WO2015174013A1 - Organic el element and lighting apparatus - Google Patents

Organic el element and lighting apparatus Download PDF

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Publication number
WO2015174013A1
WO2015174013A1 PCT/JP2015/002044 JP2015002044W WO2015174013A1 WO 2015174013 A1 WO2015174013 A1 WO 2015174013A1 JP 2015002044 W JP2015002044 W JP 2015002044W WO 2015174013 A1 WO2015174013 A1 WO 2015174013A1
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WIPO (PCT)
Prior art keywords
organic
substrate
electrode layer
layer
light emitting
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PCT/JP2015/002044
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French (fr)
Japanese (ja)
Inventor
真吾 寳角
哲夫 石田
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パナソニックＩｐマネジメント株式会社
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Publication of WO2015174013A1 publication Critical patent/WO2015174013A1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/06—Electrode terminals

Definitions

  • the present invention relates to an organic EL (Electro-Luminescence) element and a lighting device including the organic EL element.
  • organic EL Electro-Luminescence
  • Organic EL element is a light emitting element that can be driven with a low voltage and a low current.
  • the organic EL element has the advantages that the light emission luminance is large with respect to the supplied power and the light emission efficiency is good. For this reason, various devices using organic EL elements, such as lighting devices and display devices using organic EL elements, have been developed.
  • a transparent electrode, a light emitting layer, and a back electrode are sequentially laminated on the surface of a glass substrate. Further, the counter substrate is fixed with a spacer and an adhesive to seal the internal space. Thereby, stable light emission can be realized over a long period of time.
  • the conventional organic EL display device has a problem that the light emitting layer is insufficiently sealed because the light emitting layer is exposed in the sealed space. For this reason, when moisture or the like enters the sealed space, the light emitting layer deteriorates from the exposed portion, and the lifetime of the light emitting element is shortened.
  • the present invention provides a longer-life organic EL element and lighting device.
  • an organic EL element includes a first substrate and a second substrate which are disposed to face each other, and an organic layer provided between the first substrate and the second substrate.
  • a first electrode layer that is disposed so as to surround the organic light emitting unit and includes a sealing material that bonds the first substrate and the second substrate, wherein the organic light emitting unit is disposed to face each other.
  • an organic layer including a light emitting layer provided between the first electrode layer and the second electrode layer, and the sealing material includes a narrow portion and the narrow width A first wide portion having a larger sealing width than the first portion, and the first wide portion is provided in the vicinity of a portion of the end face of the organic layer that is not covered by the second electrode layer.
  • a longer-life organic EL element and a lighting device can be provided.
  • FIG. 1 is a schematic plan view showing an organic EL element according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing a cross section (AA cross section) of the organic EL element according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing a cross section (BB cross section) passing through the exposed portion of the organic layer according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic cross-sectional view showing a cross section (CC cross section) passing through the coating portion of the organic layer according to Embodiment 1 of the present invention.
  • FIG. 1 is a schematic plan view showing an organic EL element according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing a cross section (AA cross section) of the organic EL element according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing a cross section (BB cross section)
  • FIG. 5 is a schematic plan view showing a region (D region) in the vicinity of the boundary between the wide portion and the narrow portion of the sealing material according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic plan view showing an organic EL element according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic cross-sectional view showing a cross section (EE cross section) passing through the exposed portion of the organic layer according to the second embodiment of the present invention.
  • FIG. 8 is a schematic plan view showing a region (F region) in the vicinity of the boundary between the wide portion and the narrow portion of the sealing material according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic cross-sectional view showing a cross section passing through an exposed portion of the organic layer according to a modification of the second embodiment of the present invention.
  • FIG. 10 is a schematic plan view showing a corner portion of the organic EL element according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic sectional drawing which shows the cross section which passes along the terminal part which concerns on Embodiment 4 of this invention.
  • FIG. 12 is a schematic perspective view showing an illumination apparatus according to Embodiment 5 of the present invention.
  • FIG. 13A is a schematic cross-sectional view showing an example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention.
  • FIG. 13B is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention.
  • FIG. 13C is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention.
  • FIG. 13D is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention.
  • FIG. 1 is a schematic plan view showing an organic EL element 10 according to the present embodiment.
  • FIG. 2 is a schematic cross-sectional view showing the organic EL element 10 according to the present embodiment. Specifically, FIG. 2 shows an AA cross section of FIG.
  • the organic EL element 10 is, for example, a substantially rectangular planar light emitter.
  • the organic EL element 10 emits light in a substantially rectangular plane shape in the depth direction of the paper.
  • the organic EL element 10 includes a first substrate 100, a second substrate 110, an organic light emitting unit 120, a filler 130, and a sealing material 140.
  • the organic light emitting unit 120 includes a first electrode layer 121, an organic layer 122, a second electrode layer 123, and an insulating layer 124.
  • the organic EL element 10 includes a first terminal portion 151 and a second terminal portion 152 disposed outside the sealing material 140.
  • the first substrate 100 and the second substrate 110 are arranged to face each other. Specifically, the first substrate 100 and the second substrate 110 are arranged to face each other with a predetermined distance apart. For example, the distance between the first substrate 100 and the second substrate 110 is 6 ⁇ m to 100 ⁇ m, for example, 20 ⁇ m. Further, the first substrate 100 and the second substrate 110 are bonded by a sealing material 140.
  • the organic light emitting unit 120 is disposed between the first substrate 100 and the second substrate 110.
  • a filler 130 that covers and protects the organic light emitting unit 120 is filled between the first substrate 100 and the second substrate 110.
  • the first substrate 100 has translucency and transmits at least part of visible light.
  • a glass substrate such as soda glass or non-alkali glass, or a resin substrate made of a translucent resin material such as polycarbonate resin or acrylic resin.
  • a plate-shaped transparent substrate having a thickness of 0.03 mm to 1.2 mm can be used from the viewpoint of convenience of handling and mechanical characteristics.
  • the second substrate 110 has translucency and transmits at least part of visible light.
  • the second substrate 110 is composed of a glass substrate or a resin substrate.
  • a plate-shaped transparent substrate having a thickness of 0.03 mm to 1.2 mm can be used.
  • the second substrate 110 may have light reflectivity.
  • the second substrate 110 may be made of a metal material such as stainless steel or aluminum.
  • the plan view shape of the first substrate 100 is substantially rectangular as shown in FIG.
  • the plan view shape of the second substrate 110 is also substantially rectangular.
  • the first substrate 100 has a larger rectangle than the second substrate 110.
  • the second substrate 110 may have the same size as the first substrate 100, specifically, the same shape, or may be larger than the first substrate 100.
  • the organic light emitting unit 120 is a light emitting unit that emits light in a planar shape when a voltage is applied.
  • the first electrode layer 121, the organic layer 122, and the second electrode layer 123 are stacked on the first substrate 100 in this order.
  • the insulating layer 124 is provided so as to cover the end surface (side surface) of the organic layer 122.
  • the planar view shape of the organic light emitting unit 120 is substantially rectangular like the first substrate 100. Note that the planar shape of the organic light emitting unit 120 is smaller than that of the first substrate 100 and the second substrate 110.
  • a sealing material 140, and a first terminal portion 151 and a second terminal portion 152 are formed around the organic light emitting unit 120.
  • the first electrode layer 121 is an electrode provided on the light emitting surface side, and is provided on the first substrate 100, for example.
  • the first electrode layer 121 is, for example, an anode, and has a higher potential than the second electrode layer 123 when the organic EL element 10 emits light.
  • the first electrode layer 121 is made of a light-transmitting conductive material.
  • the first electrode layer 121 is made of a transparent conductive material that transmits at least part of visible light.
  • the first electrode layer 121 is made of, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide doped with aluminum (AZO), or the like.
  • the first electrode layer 121 may be a thin metal film such as silver or aluminum that can transmit light. Alternatively, Ag nanowires or Ag particles may be dispersed. Alternatively, as the first electrode layer 121, a conductive polymer such as PEDOT or polyaniline, a conductive polymer doped with any acceptor, or a conductive light-transmitting material such as a carbon nanotube may be used. it can.
  • the first electrode layer 121 is formed by forming a transparent conductive film on the first substrate 100 by vapor deposition, coating, sputtering, ion beam assist, or the like, and patterning the formed transparent conductive film. Is done.
  • the film thickness of the first electrode layer 121 is 60 nm to 200 nm, for example, 100 nm.
  • the organic layer 122 is provided between the first electrode layer 121 and the second electrode layer 123.
  • the organic layer 122 includes a light emitting layer, and emits light in a planar shape when a voltage is applied between the first electrode layer 121 and the second electrode layer 123.
  • the organic layer 122 includes a hole injection layer, a hole transport layer, a light emitting layer (organic EL layer), an electron transport layer, and an electron injection layer.
  • the organic layer 122 such as a light emitting layer is made of an organic material such as diamine, anthracene, or metal complex.
  • Each layer constituting the organic layer 122 is formed by an evaporation method, a spin coating method, a casting method, an ion beam assist method, or the like.
  • the film thickness of the organic layer 122 is 150 nm to 350 nm, for example, 210 nm.
  • the organic layer 122 is formed by doping the emission layer with dopant pigments of three colors of red, green, and blue.
  • the organic layer 122 may have a stacked structure of a blue hole transporting light emitting layer, a green electron transporting light emitting layer, and a red electron transporting light emitting layer.
  • the organic layer 122 may have a multi-unit structure in which red, green, and blue light-emitting units are stacked via an intermediate layer having light transmission and conductivity, and are electrically connected directly.
  • the second electrode layer 123 is an electrode provided on the side opposite to the light emitting surface, and is provided on the organic layer 122, for example.
  • the second electrode layer 123 is, for example, a cathode, and has a lower potential than the first electrode layer 121 when the organic EL element 10 emits light.
  • the second electrode layer 123 is made of a conductive material having light reflectivity.
  • the second electrode layer 123 reflects the light emitted from the organic layer 122 and emits it to the light emitting surface side.
  • the second electrode layer 123 is made of a metal material such as aluminum, silver, or magnesium, or an alloy containing at least one of these.
  • the second electrode layer 123 is formed by forming a conductive film on the organic layer 122 by an evaporation method, a coating method, a sputtering method, an ion beam assist method, GCIB (Gas Cluster Ion Beam) evaporation, or the like.
  • the film thickness of the second electrode layer 123 is 20 nm to 200 nm, for example, 100 nm.
  • the second electrode layer 123 may be made of a light-transmitting conductive material.
  • the same material as the first electrode layer 121 can be used for the second electrode layer 123.
  • the organic EL element 10 can be utilized for a window of a building or a vehicle as a double-sided light emitting type lighting device, for example.
  • the insulating layer 124 is provided so as to cover the end surface of the organic layer 122. Specifically, the insulating layer 124 is provided on the end portion of the first electrode layer 121 and on the first substrate 100 so as to cover the end face of the organic layer 122. Further, as shown in FIG. 2, the end surface of the insulating layer 124 is covered with the second electrode layer 123.
  • the end face of the organic layer 122 corresponds to a boundary portion between the light emitting region and the non-light emitting region (so-called frame) of the organic EL element 10.
  • the width of the covering portion by the second electrode layer 123 is set based on the frame width.
  • the width of the covering portion by the second electrode layer 123 is, for example, 0.05 mm or more.
  • the insulating layer 124 is made of an insulating resin material such as polyimide, for example.
  • the insulating layer 124 is formed by applying and curing an insulating resin material.
  • the insulating layer 124 may be made of an inorganic material such as a nitride film. Further, the insulating layer 124 is not necessarily provided. In other words, the end surface of the organic layer 122 may be exposed, or may be covered with the second electrode layer 123 in contact therewith.
  • the filler 130 is a member for sealing the organic light emitting unit 120.
  • the filler 130 is provided between the first substrate 100 and the second substrate 110 so as to cover and cover the organic light emitting unit 120.
  • the filler 130 is a resin material that is filled and cured in a space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140.
  • a photocurable, thermosetting, or two-component curable adhesive resin such as an epoxy resin, an acrylic resin, or a silicone resin
  • a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used.
  • the filler 130 may contain a desiccant.
  • the desiccant is, for example, a hygroscopic material having fine pores that adsorb moisture, and specifically, calcium oxide (CaO), zeolite, and the like.
  • CaO calcium oxide
  • zeolite zeolite
  • the filler 130 is formed by applying and curing a resin material.
  • the resin material is applied by a printing method such as roll coating, spin coating, screen printing, spray coating, slit coating, squeegee coating, or drawing coating using a dispenser, depending on the viscosity and film thickness of the resin material.
  • the sealing material 140 is a connection member that connects the first substrate 100 and the second substrate 110.
  • the sealing material 140 is an adhesive that bonds the first substrate 100 and the second substrate 110.
  • the sealing material 140 is disposed so as to surround the organic light emitting unit 120 along the outer periphery of the first substrate 100 in a plan view. Thereby, a space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140 can be sealed.
  • sealing material 140 for example, an epoxy resin, an acrylic resin, or a photocurable, thermosetting, or two-component curable adhesive resin such as a silicone resin can be used.
  • a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used.
  • an inorganic filler or the like may be mixed in the sealing material 140.
  • moisture content permeating from the outside can further be reduced.
  • the inorganic filler include silica, calcium hydroxide, calcium carbonate, and other resin materials.
  • the diameter (particle size) of the inorganic filler or the like mixed in the sealing material 140 is, for example, 6 ⁇ m to 100 ⁇ m.
  • the sealing material 140 for example, a material having a higher viscosity than the filler 130 is used. Thereby, the sealing material 140 functions as a dam material when the filler 130 is applied. That is, by applying the filler 130 after applying the sealing material 140, the filler 130 can be prevented from leaking out from the region surrounded by the sealing material 140.
  • FIGS. 3 to 5 show a terminal portion (extraction electrode) for supplying power to the first electrode layer 121 and the second electrode layer 123 according to the present embodiment and a detailed configuration of the sealing material 140.
  • FIG. 3 is a schematic cross-sectional view showing a cross section (cross section BB in FIG. 1) passing through the exposed portion of the organic layer 122 according to the present embodiment.
  • FIG. 4 is a schematic cross-sectional view showing a cross-section (cross-section CC in FIG. 1) passing through the covered portion of the organic layer 122 according to the present embodiment.
  • FIG. 5 is a schematic plan view showing a region (D region in FIG. 1) near the boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 according to the present embodiment.
  • the first terminal portion 151 and the second terminal portion 152 are disposed outside the sealing material 140.
  • the first terminal portion 151 and the second terminal portion 152 are provided along the peripheral edge of the first substrate 100 as shown in FIG. Specifically, in plan view, both the first terminal portion 151 and the second terminal portion 152 are provided on each of two opposite sides of the substantially rectangular first substrate 100.
  • the first terminal portion 151 and the second terminal portion 152 are arranged point-symmetrically with the center of the first substrate 100 as the center of symmetry. Thereby, the voltage drop in the surface of each of the first electrode layer 121 and the second electrode layer 123 can be suppressed, and the surface uniformity of light emission can be improved.
  • the first terminal portion 151 is electrically connected to the first electrode layer 121. Specifically, as shown in FIG. 3, the first terminal portion 151 is formed so that a part of the first electrode layer 121 extends. That is, the first terminal portion 151 is formed integrally with the first electrode layer 121.
  • the second terminal portion 152 is electrically connected to the second electrode layer 123. Specifically, as shown in FIG. 4, a portion extending from the second terminal portion 152 into the sealing space along the first substrate 100 is connected to the end portion of the second electrode layer 123.
  • the same material as the first electrode layer 121 can be used for the first terminal portion 151 and the second terminal portion 152.
  • a conductive film is formed on the first substrate 100 and patterned to form the first terminal portion 151 and the second terminal portion 152 together with the first electrode layer 121 at the same time.
  • the second terminal portion 152 is separated from the first electrode layer 121 and the first terminal portion 151. Specifically, insulating grooves are formed between the second terminal portion 152 and the first electrode layer 121 and between the second terminal portion 152 and the first terminal portion 151. Accordingly, the second terminal portion 152 is electrically insulated from the first electrode layer 121 and the first terminal portion 151. Note that the insulating groove may be filled with an insulating material.
  • the sealing material 140 is formed in an annular shape in plan view.
  • the sealing material 140 is a substantially rectangular frame-like body in plan view.
  • the sealing material 140 is provided in a substantially rectangular frame shape along the outer periphery of the substantially rectangular first substrate 100.
  • the sealing material 140 includes a wide portion 141 and a narrow portion 142.
  • the wide portion 141 is an example of a first wide portion having a sealing width larger than the narrow portion 142. In other words, the wide portion 141 is thicker than the narrow portion 142 in plan view.
  • the sealing width is, for example, the line width of the wide portion 141.
  • the sealing width (line width) of the wide portion 141 is, for example, 0.1 mm to 1.2 mm.
  • the narrow part 142 is a part having a sealing width smaller than the wide part 141. That is, in the sealing material 140, a portion having a relatively large sealing width is the wide portion 141, and a portion having a relatively small sealing width is the narrow portion 142.
  • the sealing width (line width) of the narrow portion 142 is, for example, 0.05 mm to 0.6 mm.
  • the wide portion 141 and the narrow portion 142 are formed, for example, by drawing and applying a resin material in a ring shape with a dispenser or the like.
  • the narrow portion 142 is formed by drawing for one line
  • the wide portion 141 is formed by drawing for two lines. That is, for example, the wide portion 141 has a sealing width approximately twice that of the narrow portion 142.
  • the line width of the wide portion 141 is thicker than the line width of the narrow portion 142, for example, approximately twice.
  • an annular frame is drawn along the outer periphery of the first substrate 100 with the resin material.
  • a line is drawn along a part of the frame so as to contact the inside or outside of the drawn frame.
  • the dropping amount is made the same in drawing the frame and drawing a line along a part of the frame.
  • the resin material After completion of drawing and after bonding the first substrate 100 and the second substrate 110, the resin material is cured by heating or light irradiation. Thereby, the wide part 141 and the narrow part 142 are formed.
  • the wide portion 141 is provided in the vicinity of the portion of the end surface of the organic layer 122 that is not covered by the second electrode layer 123 (that is, the exposed portion). Specifically, the wide portion 141 is provided on the side of the exposed portion in plan view. In other words, the wide portion 141 is formed so that the side surface of the wide portion 141 faces the exposed portion. At this time, the insulating layer 124 and the filler 130 exist between the side surface of the wide portion 141 and the end surface of the organic layer 122, and the second electrode layer 123 does not exist.
  • the wide portion 141 is disposed at a position corresponding to the first terminal portion 151.
  • the wide portion 141 is provided on the extended portion between the first electrode layer 121 and the first terminal portion 151.
  • the narrow portion 142 is provided in the vicinity of the portion of the end face of the organic layer 122 that is covered with the second electrode layer 123 (that is, the covering portion). Specifically, the narrow portion 142 is provided on the side of the covering portion in plan view. In other words, the narrow portion 142 is formed so that the side surface of the narrow portion 142 faces the covering portion. At this time, the insulating layer 124, the second electrode layer 123, and the filler 130 exist between the side surface of the narrow portion 142 and the end surface of the organic layer 122.
  • the narrow portion 142 is disposed at a position corresponding to the second terminal portion 152.
  • the narrow portion 142 is provided on the extended portion of the second terminal portion 152.
  • a step is generated on the end surface of the second electrode layer 123 in plan view as shown in FIG.
  • the boundary is provided, for example, between the first terminal unit 151 and the second terminal unit 152.
  • a boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 is provided corresponding to the boundary between the exposed portion and the covering portion of the organic layer 122.
  • the sealing material 140 is provided so that the boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 is substantially collinear with the boundary between the exposed portion and the covering portion of the organic layer 122.
  • the boundary between the wide portion 141 and the narrow portion 142 is provided between the first terminal portion 151 and the second terminal portion 152. That is, the wide portion 141 and the second terminal portion 152 are separated from each other.
  • the narrow portion 142 is provided not only on the extended portion of the second terminal portion 152 but also on the portion where the first terminal portion 151 and the second terminal portion 152 are not provided.
  • the upper and lower portions of the sealing material 140 are the narrow portions 142.
  • the end surface of the organic layer 122 is covered with the second electrode layer 123, and a narrow portion 142 is provided in the vicinity of the covering portion.
  • the moisture that enters from between the first substrate 100 and the second substrate 110 becomes a problem when the life of the organic EL element 10 is extended. Since the first substrate 100 and the second substrate 110 are made of glass having a low moisture permeability, that is, excellent in waterproofness, the moisture transmitted through the first substrate 100 and the second substrate 110 is It does not have to be taken into account.
  • moisture that enters from between the first substrate 100 and the second substrate 110 includes the sealing material 140, the filler 130, the insulating layer 124, and the second electrode layer 123 (organic layer 122). And the organic layer 122 is reached. Therefore, by increasing the distance from the sealing material 140 to the organic layer 122, the time for moisture to penetrate can be increased. For example, the widths of the insulating layer 124, the filler 130, and the sealing material 140 may be increased.
  • the organic EL element 10 is required to have a narrow frame.
  • the frame portions of the organic EL elements 10 are adjacent to each other, and the non-light-emitting region becomes large. Therefore, in order to realize a narrow frame, the distance from the sealing material 140 to the organic layer 122 cannot be simply increased.
  • the organic EL element 10 is provided between the first substrate 100 and the second substrate 110 that are disposed to face each other, and between the first substrate 100 and the second substrate 110.
  • the organic light emitting unit 120 and the sealing member 140 that bonds the first substrate 100 and the second substrate 110 are disposed so as to surround the organic light emitting unit 120, and the organic light emitting units 120 are disposed to face each other.
  • the narrow portion 142 and the wide portion 141 having a larger sealing width than the narrow portion 142 are provided, and the wide portion 141 is provided in the vicinity of a portion of the end surface of the organic layer 122 that is not covered by the second electrode layer 123. It has been.
  • the wide portion 141 is provided in the vicinity of the exposed portion of the end face of the organic layer 122 that is not covered by the second electrode layer 123, so that moisture permeates the wide portion 141.
  • the time required for this can be lengthened. Therefore, the lifetime of the organic EL element 10 can be extended.
  • the sealing material 140 becomes thicker than necessary. It is possible to suppress and realize a narrow frame. Moreover, since the sealing material 140 does not include the wide portion 141 as a whole but has the narrow portion 142, the material used as the sealing material 140 can be reduced, and the cost can be reduced. That is, the wide portion 141 is provided only in the vicinity of the exposed portion, and the narrow portion 142 is provided in other portions, so that the material can be reduced and the cost can be reduced.
  • the vicinity of the narrow portion 142 in the end face of the organic layer 122 is covered with the second electrode layer 123.
  • the end surface of the organic layer 122 is covered with the second electrode layer 123. For this reason, even if the time for moisture to penetrate the sealing material 140 is short, it takes time for the moisture that has entered the sealing space to penetrate the second electrode layer 123. Therefore, by providing the narrow portion 142 in the vicinity of the covering portion on the end face of the organic layer 122, it is possible to extend the life of the organic EL element 10 and realize a narrow frame.
  • the organic EL element 10 is further electrically connected to the first electrode layer 121 and electrically connected to the first terminal portion 151 and the second electrode layer 123 disposed outside the sealing material 140.
  • the end face of the organic layer 122 In order to provide the first terminal portion 151 connected to the first electrode layer 121, the end face of the organic layer 122 must be exposed. When the end surface of the organic layer 122 is covered with the second electrode layer 123, the second electrode layer 123 comes into contact with the first electrode layer 121 and is electrically short-circuited. For this reason, there is a portion where the end surface of the organic layer 122 is exposed in the vicinity of the first terminal portion 151, and therefore, by providing the wide portion 141 in the vicinity of the first terminal portion 151, the organic layer 122 can be appropriately formed. Can be protected. Therefore, the lifetime of the organic EL element 10 can be extended.
  • the wide portion 141 and the second terminal portion 152 are separated from each other.
  • the 2nd terminal part 152 and the wide part 141 can be arrange
  • FIG. 6 is a schematic plan view showing the organic EL element 20 according to the present embodiment.
  • FIG. 7 is a schematic cross-sectional view showing a cross-section (cross-section EE in FIG. 6) passing through the exposed portion of the organic layer 122 according to the present embodiment.
  • FIG. 8 is a schematic plan view showing a region (F region in FIG. 6) in the vicinity of the boundary between the wide portion 241 and the narrow portion 142 of the sealing material 240 according to the present embodiment.
  • the organic EL element 20 according to the present embodiment is different from the organic EL element 10 shown in FIG. 1 in that a sealing material 240 is provided instead of the sealing material 140.
  • the sealing material 240 includes a wide portion 241 instead of the wide portion 141. Below, it demonstrates focusing on a different point.
  • the wide portion 241 has a space 243 inside.
  • the space 243 is a sealed space.
  • the space 243 is provided in a substantially linear shape, for example, as shown in FIG. Specifically, it is provided in a line shape along the longitudinal direction of the wide portion 241. As shown in FIG. 7, the space 243 is provided in the central portion of the wide portion 241.
  • the wide portion 241 is formed by drawing for two lines. Specifically, first, an annular frame is drawn on the resin material along the outer periphery of the first substrate 100. Next, a line is drawn along a part of the frame at a predetermined distance inside or outside the drawn frame. That is, drawing is performed so that a part of the frame is parallel to the line. At this time, as shown in FIG. 8, the end of the line is drawn in contact with the frame. Thereby, a substantially linear space 243 having a width of a predetermined distance is formed.
  • the resin material is cured by heating or light irradiation.
  • the wide part 241 and the narrow part 142 which have the space 243 inside are formed.
  • the wide portion 241 has two narrow portions drawn apart from each other and a space between the two narrow portions.
  • the space 243 is formed with a line width of 0.05 mm to 0.5 mm.
  • the bonding of the first substrate 100 and the second substrate 110 is performed under a reduced pressure lower than atmospheric pressure, for example.
  • the vacuum state is a sufficiently reduced pressure state, for example, a state where the degree of vacuum is 0.1 Pa.
  • the space 243 is under reduced pressure (specifically, a vacuum state). Therefore, moisture that has entered the space 243 is confined in the space 243. Therefore, since it is possible to delay the entry of moisture into the sealed space, the life of the organic EL element 20 can be extended.
  • the wide portion 241 has the space 243 inside.
  • FIG. 9 is a schematic cross-sectional view showing a cross section (corresponding to the EE cross section of FIG. 6) passing through the exposed portion of the organic layer 122 according to this modification.
  • the filler 244 is filled in the space 243 of the wide portion 241 according to the second embodiment.
  • the filler 244 is made of a resin material containing a desiccant, for example.
  • the desiccant is, for example, a hygroscopic material having fine pores that adsorb moisture, and specifically, calcium oxide (CaO), zeolite, and the like.
  • As the desiccant it is preferable to use a material having a larger moisture absorption capacity.
  • the resin material is, for example, a material having a small amount of moisture permeation (moisture permeability), and specifically, an epoxy resin or the like.
  • a resin material containing a desiccant is filled in the space 243 using a dispenser or the like.
  • the filler 244 is formed by being cured by heating or light irradiation.
  • the resin material is filled in the space 243 by drawing coating, droplets, or the like.
  • the space 243 is filled with the filler 244.
  • FIG. 10 is a schematic plan view showing a corner portion of the organic EL element 30 according to the present embodiment.
  • the organic EL element 30 according to the present embodiment is different from the organic EL element 10 shown in FIG. 1 in that a sealing material 340 is provided instead of the sealing material 140.
  • the sealing material 340 further includes a wide portion 341. Below, it demonstrates focusing on a different point.
  • the wide portion 341 is provided at a corner portion of the sealing material 340.
  • the wide portion 341 is an example of a second wide portion having a sealing width larger than that of the narrow portion 142.
  • the sealing width is, for example, 0.1 mm to 0.6 mm.
  • the wide portion 341 is formed, for example, by drawing and applying a resin material with a dispenser or the like.
  • the wide portion 341 is formed by drawing for two lines or more. Specifically, after drawing an annular frame in the same manner as in the first embodiment, it is pointed inside or outside the corner of the frame. Thereby, the sealing material 340 can make the sealing width of a corner
  • the planar view shape of the organic layer 122 is substantially rectangular. For this reason, the organic layer 122 has corners in plan view. Specifically, the organic layer 122 has corner portions of approximately 90 degrees at the four corners.
  • the corner part there are more moisture intrusion routes than in other parts.
  • moisture enters from one direction, whereas moisture enters from both of the two sides constituting the approximately 90 degree corner of the organic layer 122.
  • moisture enters from two directions, from the lower side and from the right side. Therefore, the deterioration of the organic layer 122 proceeds faster than other portions.
  • the organic light emitting unit 120 is substantially rectangular in a plan view
  • the sealing material 340 is a substantially rectangular frame-like body in a plan view.
  • a wide portion 341 is provided at a corner of the body and has a larger sealing width than the narrow portion 142.
  • the sealing width of the sealing material 340 at the corner portion it is possible to delay the entry of moisture into the corner portion. Therefore, the lifetime of the organic EL element 30 can be extended.
  • the second electrode layer 123 may cover the corner portion of the organic layer 122 in this embodiment in order to further delay the intrusion of moisture at the corner portion. That is, the first terminal portion 151 is offset with respect to the first electrode layer 121. Specifically, as shown in FIG. 10, the first terminal portion 151 is arranged such that a step is formed by the first terminal portion 151 and the first electrode layer 121 in plan view.
  • a part of the wide part 341 may cover the corner part of the second electrode layer 123.
  • FIG. 11 is a schematic cross-sectional view showing a cross section passing through the terminal portion of the organic EL element 40 according to the present embodiment.
  • FIG. 11 corresponds to, for example, the BB cross section or CC cross section shown in FIG.
  • the organic EL element 40 according to the present embodiment is different from the organic EL element 10 shown in FIG. 2 in that a terminal protection unit 460 is newly provided. Below, it demonstrates focusing on a different point.
  • the terminal protection part 460 is, for example, a resin material and covers the first terminal part 151 and the second terminal part 152. Specifically, the terminal protection unit 460 is formed by applying a resin material and curing the first terminal unit 151 or the second terminal unit 152 after performing circuit mounting and terminal crimping. Circuit mounting and terminal crimping are, for example, soldering, wire bonding, silver paste application, and the like.
  • an insulating resin material can be used.
  • an epoxy resin, an acrylic resin, a silicone resin, or other photo-curing, thermosetting, or two-component curable adhesive resin can be used.
  • a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used. The resin material is applied by, for example, drawing application or droplets.
  • the distance from the sealing material 140 to the end surface of the first substrate 100 is, for example, 0.3 mm to 0.5 mm.
  • the terminal protection unit 460 is filled and cured so as to fill the space between the first substrate 100 and the second substrate 110.
  • the organic EL element 40 further includes the terminal protection unit 460 that protects the first terminal unit 151 and the second terminal unit 152.
  • the terminal protection portion 460 can suppress the ingress of moisture. Therefore, the lifetime of the organic EL element 40 can be further extended.
  • FIG. 12 is an overview perspective view showing the illumination device 50 according to the present embodiment.
  • the illuminating device 50 includes a light emitting unit 51 including a plurality of organic EL elements 10, a hanging tool 52 for installing the light emitting unit 51 on a ceiling, and a power cord 53 that connects the light emitting unit 51 and the hanging tool 52.
  • a light emitting unit 51 including a plurality of organic EL elements 10
  • a hanging tool 52 for installing the light emitting unit 51 on a ceiling
  • a power cord 53 that connects the light emitting unit 51 and the hanging tool 52.
  • the light emitting unit 51 is configured by arranging a plurality of the organic EL elements 10 so as to be adjacent to each other, for example. Further, the end of the light emitting unit 51 is covered and protected by the lamp case 54.
  • the hanger 52 has a remote control light receiving unit 55 for receiving a remote control signal transmitted from a remote control (not shown) on the surface thereof.
  • the illumination device 50 according to the present embodiment includes, for example, the organic EL element 10 according to the first embodiment.
  • the illuminating device 50 which concerns on this Embodiment has an effect similar to Embodiment 1.
  • the lighting device 50 is not limited to a configuration that is suspended from the ceiling, and the same effect can be obtained even when the configuration is installed on a wall.
  • the hermetically sealing structure in which the filler 130 is filled in the space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140 is not limited thereto. Absent.
  • the structure for sealing the organic light emitting unit 120 may be in any form.
  • FIGS. 13A to 13D are diagrams showing an example of a sealing structure of an organic EL element according to a modification of the present embodiment.
  • a sheet desiccant 630 is provided instead of filling the filler 130 in the sealed space.
  • the sheet desiccant 630 is, for example, a member obtained by laminating a hygroscopic substrate from both sides with a film or the like.
  • a second substrate 610 having a main surface provided with a recess is used.
  • the second substrate 610 is made of dug glass.
  • the sheet desiccant 630 is provided in the recess of the second substrate 610.
  • a coating-type desiccant 631 is provided instead of filling the filler 130 in the sealed space.
  • the coating-type desiccant 631 is, for example, a resin containing a desiccant.
  • a second substrate 611 having a concave portion on the main surface is used instead of the second substrate 110.
  • the second substrate 611 is made of dug glass.
  • the coating-type desiccant 631 is provided in the concave portion of the second substrate 611.
  • the second substrate 611 has a shallower recess than the second substrate 610.
  • the coating type desiccant 631 is applied to the organic light emitting unit 120.
  • the coating desiccant 631 is applied to the organic light emitting unit 120 via the element protective layer 632.
  • the element protective layer 632 is an insulating protective film such as a nitride film, for example.
  • the moisture that has entered through the sealing material 140 is absorbed by the sheet desiccant 630 or the coating-type desiccant 631, so that the organic layer 122 can be prevented from deteriorating.
  • first terminal portion 151 and the second terminal portion 152 are provided on two opposing sides of a substantially rectangular shape, but the arrangement of the first terminal portion 151 and the second terminal portion 152 is provided. Is not limited to this.
  • the first terminal portion 151 and the second terminal portion 152 may be provided only on one side of a substantially rectangular shape.
  • the first terminal portion 151 may be provided on one side of the substantially rectangular shape
  • the second terminal portion 152 may be provided on the other side.
  • the wide portion 141 is formed on the left side of the sealing material 140 and the remaining portion is narrow. Part 142 is formed.
  • the first terminal portion 151 and the second terminal portion 152 may be provided on all four sides.
  • the sealing width of the wide portion 141 is approximately twice that of the narrow portion 142
  • the resin material constituting the sealing material 140 may be drawn in a ring shape to form a frame, and then the dripping amount may be changed to form a line along a part of the frame.
  • the sealing width of the wide portion 141 can be made larger than the sealing width of the narrow portion 142 and smaller than about twice the sealing width of the narrow portion 142.
  • the sealing width of the wide portion 141 can be made approximately three times or more the sealing width of the narrow portion 142.
  • the linear space 243 is formed in the central portion of the wide portion 241.
  • a plurality of spaces 243 may be formed.
  • the resin material constituting the sealing material 140 is drawn in a ring shape to form a frame, and then a line is drawn along a part of the frame with a predetermined distance, and further, the frame is separated by a predetermined distance.
  • two cleaning spaces 243 can be formed by drawing a line along a part of the frame.
  • the first terminal portion 151 and the first electrode layer 121 are integrally formed.
  • the 1st terminal part 151 and the 1st electrode layer 121 may be comprised from another member.
  • the second terminal portion 152 and the second electrode layer 123 may be integrally formed.
  • the first electrode layer 121 is an anode and the second electrode layer 123 is a cathode is shown, but the reverse may be possible. That is, the first electrode layer 121 may be a cathode and the second electrode layer 123 may be an anode.
  • planar view shape of the organic EL element 10 is rectangular has been described, but the present invention is not limited thereto.
  • the planar view shape of the organic EL element 10 may be a closed shape drawn by a straight line or a curve, such as a polygon, a circle, or an ellipse.
  • the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

Abstract

This organic EL element is provided with: a first substrate (100) and a second substrate (110), which are disposed to face each other; an organic light emitting section (120) that is disposed between the first substrate (100) and the second substrate (110); and a sealing material (140), which is disposed such that the sealing material surrounds the organic light emitting section (120), and which bonds the first substrate (100) and the second substrate (110) to each other. The organic light emitting section (120) includes: a first electrode layer (121) and a second electrode layer (123), which are disposed to face each other; and an organic layer (122), which is provided between the first electrode layer (121) and the second electrode layer (123), and which includes a light emitting layer. The sealing material (140) has a small-width section (142), and a large-width section (141) having a sealing width larger than that of the small-width section (142), and the large-width section (141) is provided close to an end surface portion of the organic layer (122), said portion not being covered with the second electrode layer (123).

Description

有機ＥＬ素子及び照明装置Organic EL element and lighting device
　本発明は、有機ＥＬ（Ｅｌｅｃｔｒｏ－Ｌｕｍｉｎｅｓｃｅｎｃｅ）素子、及び、当該有機ＥＬ素子を備える照明装置に関する。 The present invention relates to an organic EL (Electro-Luminescence) element and a lighting device including the organic EL element.
　有機ＥＬ素子は、低電圧、低電流で駆動可能な発光素子である。また、有機ＥＬ素子は、供給電力に対して発光輝度が大きく、発光効率が良いという利点がある。このため、従来、有機ＥＬ素子を用いた様々なデバイス、例えば、有機ＥＬ素子を用いた照明装置及び表示装置などが開発されている。 Organic EL element is a light emitting element that can be driven with a low voltage and a low current. In addition, the organic EL element has the advantages that the light emission luminance is large with respect to the supplied power and the light emission efficiency is good. For this reason, various devices using organic EL elements, such as lighting devices and display devices using organic EL elements, have been developed.
　例えば、特許文献１に記載の有機ＥＬ表示装置では、ガラス基板の表面に透明電極、発光層、背面電極が順に積層されている。また、対向基板がスペーサ及び接着剤で固定されて内部空間が封止されている。これにより、長期にわたって安定した発光を実現しうる。 For example, in the organic EL display device described in Patent Document 1, a transparent electrode, a light emitting layer, and a back electrode are sequentially laminated on the surface of a glass substrate. Further, the counter substrate is fixed with a spacer and an adhesive to seal the internal space. Thereby, stable light emission can be realized over a long period of time.
特開２００３－３１７９３４号公報JP 2003-317934 A
　しかしながら、上記従来の有機ＥＬ表示装置では、発光層が封止空間内に露出しているため、発光層の封止性が不十分であるという課題がある。このため、封止空間内に水分などが浸入した場合に、露出した部分から発光層が劣化し、発光素子としての寿命が短くなる。 However, the conventional organic EL display device has a problem that the light emitting layer is insufficiently sealed because the light emitting layer is exposed in the sealed space. For this reason, when moisture or the like enters the sealed space, the light emitting layer deteriorates from the exposed portion, and the lifetime of the light emitting element is shortened.
　そこで、本発明は、より長寿命な有機ＥＬ素子及び照明装置を提供する。 Therefore, the present invention provides a longer-life organic EL element and lighting device.
　上記課題を解決するため、本発明の一態様に係る有機ＥＬ素子は、互いに対向配置された第１基板及び第２基板と、前記第１基板と前記第２基板との間に設けられた有機発光部と、前記有機発光部を囲むように配置され、前記第１基板と前記第２基板とを接着する封止材とを備え、前記有機発光部は、互いに対向配置された第１電極層及び第２電極層と、前記第１電極層と前記第２電極層との間に設けられた、発光層を含む有機層とを含み、前記封止材は、幅狭部と、前記幅狭部より封止幅が大きい第１幅広部とを有し、前記第１幅広部は、前記有機層の端面のうち前記第２電極層によって覆われていない部分の近傍に設けられている。 In order to solve the above-described problem, an organic EL element according to one embodiment of the present invention includes a first substrate and a second substrate which are disposed to face each other, and an organic layer provided between the first substrate and the second substrate. A first electrode layer that is disposed so as to surround the organic light emitting unit and includes a sealing material that bonds the first substrate and the second substrate, wherein the organic light emitting unit is disposed to face each other. And an organic layer including a light emitting layer provided between the first electrode layer and the second electrode layer, and the sealing material includes a narrow portion and the narrow width A first wide portion having a larger sealing width than the first portion, and the first wide portion is provided in the vicinity of a portion of the end face of the organic layer that is not covered by the second electrode layer.
　本発明によれば、より長寿命な有機ＥＬ素子及び照明装置を提供することができる。 According to the present invention, a longer-life organic EL element and a lighting device can be provided.
図１は、本発明の実施の形態１に係る有機ＥＬ素子を示す概略平面図である。FIG. 1 is a schematic plan view showing an organic EL element according to Embodiment 1 of the present invention. 図２は、本発明の実施の形態１に係る有機ＥＬ素子の断面（Ａ－Ａ断面）を示す概略断面図である。FIG. 2 is a schematic cross-sectional view showing a cross section (AA cross section) of the organic EL element according to Embodiment 1 of the present invention. 図３は、本発明の実施の形態１に係る有機層の露出部分を通る断面（Ｂ－Ｂ断面）を示す概略断面図である。FIG. 3 is a schematic cross-sectional view showing a cross section (BB cross section) passing through the exposed portion of the organic layer according to Embodiment 1 of the present invention. 図４は、本発明の実施の形態１に係る有機層の被覆部分を通る断面（Ｃ－Ｃ断面）を示す概略断面図である。FIG. 4 is a schematic cross-sectional view showing a cross section (CC cross section) passing through the coating portion of the organic layer according to Embodiment 1 of the present invention. 図５は、本発明の実施の形態１に係る封止材の幅広部と幅狭部との境界近傍の領域（Ｄ領域）を示す概略平面図である。FIG. 5 is a schematic plan view showing a region (D region) in the vicinity of the boundary between the wide portion and the narrow portion of the sealing material according to Embodiment 1 of the present invention. 図６は、本発明の実施の形態２に係る有機ＥＬ素子を示す概略平面図である。FIG. 6 is a schematic plan view showing an organic EL element according to Embodiment 2 of the present invention. 図７は、本発明の実施の形態２に係る有機層の露出部分を通る断面（Ｅ－Ｅ断面）を示す概略断面図である。FIG. 7 is a schematic cross-sectional view showing a cross section (EE cross section) passing through the exposed portion of the organic layer according to the second embodiment of the present invention. 図８は、本発明の実施の形態２に係る封止材の幅広部と幅狭部との境界近傍の領域（Ｆ領域）を示す概略平面図である。FIG. 8 is a schematic plan view showing a region (F region) in the vicinity of the boundary between the wide portion and the narrow portion of the sealing material according to Embodiment 2 of the present invention. 図９は、本発明の実施の形態２の変形例に係る有機層の露出部分を通る断面を示す概略断面図である。FIG. 9 is a schematic cross-sectional view showing a cross section passing through an exposed portion of the organic layer according to a modification of the second embodiment of the present invention. 図１０は、本発明の実施の形態３に係る有機ＥＬ素子の角部分を示す概略平面図である。FIG. 10 is a schematic plan view showing a corner portion of the organic EL element according to Embodiment 3 of the present invention. 図１１は、本発明の実施の形態４に係る端子部を通る断面を示す概略断面図である。FIG. 11: is a schematic sectional drawing which shows the cross section which passes along the terminal part which concerns on Embodiment 4 of this invention. 図１２は、本発明の実施の形態５に係る照明装置を示す概観斜視図である。FIG. 12 is a schematic perspective view showing an illumination apparatus according to Embodiment 5 of the present invention. 図１３Ａは、本発明の実施の形態の変形例に係る有機ＥＬ素子の封止構造の一例を示す概略断面図である。FIG. 13A is a schematic cross-sectional view showing an example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention. 図１３Ｂは、本発明の実施の形態の変形例に係る有機ＥＬ素子の封止構造の別の一例を示す概略断面図である。FIG. 13B is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention. 図１３Ｃは、本発明の実施の形態の変形例に係る有機ＥＬ素子の封止構造の別の一例を示す概略断面図である。FIG. 13C is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention. 図１３Ｄは、本発明の実施の形態の変形例に係る有機ＥＬ素子の封止構造の別の一例を示す概略断面図である。FIG. 13D is a schematic cross-sectional view showing another example of a sealing structure of an organic EL element according to a modification of the embodiment of the present invention.
　以下では、本発明の実施の形態に係る有機ＥＬ素子及び照明装置について、図面を用いて詳細に説明する。なお、以下に説明する実施の形態は、いずれも本発明の好ましい一具体例を示すものである。したがって、以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置及び接続形態などは、一例であり、本発明を限定する趣旨ではない。よって、以下の実施の形態における構成要素のうち、本発明の最上位概念を示す独立請求項に記載されていない構成要素については、任意の構成要素として説明される。 Hereinafter, the organic EL element and the illumination device according to the embodiment of the present invention will be described in detail with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangements, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.
　また、各図は、模式図であり、必ずしも厳密に図示されたものではない。また、各図において、同じ構成部材については同じ符号を付している。 Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected about the same structural member.
　（実施の形態１）
　［有機ＥＬ素子］
　まず、実施の形態１に係る有機ＥＬ素子について、図１及び図２を用いて説明する。図１は、本実施の形態に係る有機ＥＬ素子１０を示す概略平面図である。図２は、本実施の形態に係る有機ＥＬ素子１０を示す概略断面図である。具体的には、図２は、図１のＡ－Ａ断面を示している。 (Embodiment 1)
[Organic EL device]
First, the organic EL element according to Embodiment 1 will be described with reference to FIGS. FIG. 1 is a schematic plan view showing an organic EL element 10 according to the present embodiment. FIG. 2 is a schematic cross-sectional view showing the organic EL element 10 according to the present embodiment. Specifically, FIG. 2 shows an AA cross section of FIG.
　図１に示すように、有機ＥＬ素子１０は、例えば、略矩形の平面発光体である。有機ＥＬ素子１０は、例えば、紙面奥行方向に略矩形の面状に発光する。 As shown in FIG. 1, the organic EL element 10 is, for example, a substantially rectangular planar light emitter. For example, the organic EL element 10 emits light in a substantially rectangular plane shape in the depth direction of the paper.
　図２に示すように、有機ＥＬ素子１０は、第１基板１００と、第２基板１１０と、有機発光部１２０と、充填材１３０と、封止材１４０とを備える。また、有機発光部１２０は、第１電極層１２１と、有機層１２２と、第２電極層１２３と、絶縁層１２４とを備える。また、図１に示すように、有機ＥＬ素子１０は、封止材１４０の外側に配置された第１端子部１５１及び第２端子部１５２を備える。 As shown in FIG. 2, the organic EL element 10 includes a first substrate 100, a second substrate 110, an organic light emitting unit 120, a filler 130, and a sealing material 140. The organic light emitting unit 120 includes a first electrode layer 121, an organic layer 122, a second electrode layer 123, and an insulating layer 124. As shown in FIG. 1, the organic EL element 10 includes a first terminal portion 151 and a second terminal portion 152 disposed outside the sealing material 140.
　［基板］
　第１基板１００及び第２基板１１０は、互いに対向配置されている。具体的には、第１基板１００と第２基板１１０とは、所定の距離を離間して互いに対向するように配置されている。例えば、第１基板１００と第２基板１１０との距離は、６μｍ～１００μｍであり、一例として２０μｍである。また、第１基板１００と第２基板１１０とは、封止材１４０によって接着されている。 [substrate]
The first substrate 100 and the second substrate 110 are arranged to face each other. Specifically, the first substrate 100 and the second substrate 110 are arranged to face each other with a predetermined distance apart. For example, the distance between the first substrate 100 and the second substrate 110 is 6 μm to 100 μm, for example, 20 μm. Further, the first substrate 100 and the second substrate 110 are bonded by a sealing material 140.
　第１基板１００と第２基板１１０との間には、有機発光部１２０が配置されている。また、第１基板１００と第２基板１１０との間には、有機発光部１２０を覆って保護する充填材１３０が充填されている。 The organic light emitting unit 120 is disposed between the first substrate 100 and the second substrate 110. In addition, a filler 130 that covers and protects the organic light emitting unit 120 is filled between the first substrate 100 and the second substrate 110.
　第１基板１００は、透光性を有し、可視光の少なくとも一部を透過する。例えば、ソーダガラス、無アルカリガラスなどのガラス基板、又は、ポリカーボネート樹脂、アクリル樹脂などの透光性樹脂材料からなる樹脂基板である。例えば、第１基板１００としては、取り扱いの利便性と機械特性とから、厚さが０．０３ｍｍ～１．２ｍｍの板状の透明基板を用いることができる。 The first substrate 100 has translucency and transmits at least part of visible light. For example, a glass substrate such as soda glass or non-alkali glass, or a resin substrate made of a translucent resin material such as polycarbonate resin or acrylic resin. For example, as the first substrate 100, a plate-shaped transparent substrate having a thickness of 0.03 mm to 1.2 mm can be used from the viewpoint of convenience of handling and mechanical characteristics.
　第２基板１１０は、透光性を有し、可視光の少なくとも一部を透過する。例えば、第２基板１１０は、ガラス基板又は樹脂基板から構成される。例えば、第２基板１１０としては、第１基板１００と同様に、厚さが０．０３ｍｍ～１．２ｍｍの板状の透明基板を用いることができる。あるいは、第２基板１１０は、光反射性を有してもよい。第２基板１１０は、ステンレス、アルミニウムなどの金属材料から構成されてもよい。 The second substrate 110 has translucency and transmits at least part of visible light. For example, the second substrate 110 is composed of a glass substrate or a resin substrate. For example, as the second substrate 110, similarly to the first substrate 100, a plate-shaped transparent substrate having a thickness of 0.03 mm to 1.2 mm can be used. Alternatively, the second substrate 110 may have light reflectivity. The second substrate 110 may be made of a metal material such as stainless steel or aluminum.
　第１基板１００の平面視形状は、図１に示すように、略矩形である。同様に、第２基板１１０の平面視形状も略矩形である。本実施の形態に係る有機ＥＬ素子１０では、第１基板１００が第２基板１１０より大きい矩形である。なお、第２基板１１０は、第１基板１００と同一の大きさ、具体的には、同一の形状でもよく、あるいは、第１基板１００より大きくてもよい。 The plan view shape of the first substrate 100 is substantially rectangular as shown in FIG. Similarly, the plan view shape of the second substrate 110 is also substantially rectangular. In the organic EL element 10 according to the present embodiment, the first substrate 100 has a larger rectangle than the second substrate 110. The second substrate 110 may have the same size as the first substrate 100, specifically, the same shape, or may be larger than the first substrate 100.
　［有機発光部］
　有機発光部１２０は、電圧が印加された場合に平面状に発光する発光部である。第１電極層１２１と、有機層１２２と、第２電極層１２３とは、この順で第１基板１００上に積層されている。また、絶縁層１２４は、有機層１２２の端面（側面）を覆うように設けられている。 [Organic light emitting part]
The organic light emitting unit 120 is a light emitting unit that emits light in a planar shape when a voltage is applied. The first electrode layer 121, the organic layer 122, and the second electrode layer 123 are stacked on the first substrate 100 in this order. The insulating layer 124 is provided so as to cover the end surface (side surface) of the organic layer 122.
　図１に示すように、有機発光部１２０の平面視形状は、第１基板１００と同様に略矩形である。なお、有機発光部１２０の平面視形状は、第１基板１００及び第２基板１１０より小さい。有機発光部１２０の周囲に封止材１４０、並びに、第１端子部１５１及び第２端子部１５２が形成される。 As shown in FIG. 1, the planar view shape of the organic light emitting unit 120 is substantially rectangular like the first substrate 100. Note that the planar shape of the organic light emitting unit 120 is smaller than that of the first substrate 100 and the second substrate 110. A sealing material 140, and a first terminal portion 151 and a second terminal portion 152 are formed around the organic light emitting unit 120.
　第１電極層１２１は、発光面側に設けられた電極であり、例えば、第１基板１００上に設けられる。第１電極層１２１は、例えば、陽極であり、有機ＥＬ素子１０の発光時には、第２電極層１２３よりも高い電位になる。 The first electrode layer 121 is an electrode provided on the light emitting surface side, and is provided on the first substrate 100, for example. The first electrode layer 121 is, for example, an anode, and has a higher potential than the second electrode layer 123 when the organic EL element 10 emits light.
　第１電極層１２１は、透光性を有する導電性材料から構成される。例えば、第１電極層１２１は、可視光の少なくとも一部を透過する透明の導電性材料から構成される。第１電極層１２１は、例えば、酸化インジウムスズ（ＩＴＯ）、酸化インジウム亜鉛（ＩＺＯ）、アルミニウムをドープした酸化亜鉛（ＡＺＯ）などから構成される。 The first electrode layer 121 is made of a light-transmitting conductive material. For example, the first electrode layer 121 is made of a transparent conductive material that transmits at least part of visible light. The first electrode layer 121 is made of, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide doped with aluminum (AZO), or the like.
　なお、第１電極層１２１は、光を透過できる程度に薄膜の銀、アルミニウムなどの金属薄膜でもよい。あるいは、Ａｇナノワイヤ又はＡｇ粒子を分散させてもよい。あるいは、第１電極層１２１としては、ＰＥＤＯＴ、ポリアニリンなどの導電性高分子、若しくは、任意のアクセプタなどでドープした導電性高分子、又は、カーボンナノチューブなどの導電性光透過性材料を用いることもできる。 The first electrode layer 121 may be a thin metal film such as silver or aluminum that can transmit light. Alternatively, Ag nanowires or Ag particles may be dispersed. Alternatively, as the first electrode layer 121, a conductive polymer such as PEDOT or polyaniline, a conductive polymer doped with any acceptor, or a conductive light-transmitting material such as a carbon nanotube may be used. it can.
　例えば、第１電極層１２１は、蒸着法、塗布法、スパッタリング法又はイオンビームアシスト法などによって透明導電膜を第１基板１００上に成膜し、成膜した透明導電膜をパターニングすることで形成される。例えば、第１電極層１２１の膜厚は、６０ｎｍ～２００ｎｍであり、一例として、１００ｎｍである。 For example, the first electrode layer 121 is formed by forming a transparent conductive film on the first substrate 100 by vapor deposition, coating, sputtering, ion beam assist, or the like, and patterning the formed transparent conductive film. Is done. For example, the film thickness of the first electrode layer 121 is 60 nm to 200 nm, for example, 100 nm.
　有機層１２２は、第１電極層１２１及び第２電極層１２３の間に設けられる。有機層１２２は、発光層を含み、第１電極層１２１及び第２電極層１２３の間に電圧が印加されることで、面状に発光する。 The organic layer 122 is provided between the first electrode layer 121 and the second electrode layer 123. The organic layer 122 includes a light emitting layer, and emits light in a planar shape when a voltage is applied between the first electrode layer 121 and the second electrode layer 123.
　具体的には、有機層１２２は、正孔注入層、正孔輸送層、発光層（有機ＥＬ層）、電子輸送層及び電子注入層を含んでいる。発光層などの有機層１２２は、例えば、ジアミン、アントラセン、金属錯体などの有機材料から構成される。有機層１２２を構成する各層は、蒸着法、スピンコート法、キャスト法、又は、イオンビームアシスト法などにより形成される。例えば、有機層１２２の膜厚は、１５０ｎｍ～３５０ｎｍであり、一例として、２１０ｎｍである。 Specifically, the organic layer 122 includes a hole injection layer, a hole transport layer, a light emitting layer (organic EL layer), an electron transport layer, and an electron injection layer. The organic layer 122 such as a light emitting layer is made of an organic material such as diamine, anthracene, or metal complex. Each layer constituting the organic layer 122 is formed by an evaporation method, a spin coating method, a casting method, an ion beam assist method, or the like. For example, the film thickness of the organic layer 122 is 150 nm to 350 nm, for example, 210 nm.
　例えば、発光色が白色の場合には、有機層１２２は、発光層中に赤色、緑色、青色の３色のドーパント色素をドーピングして形成される。あるいは、有機層１２２は、青色正孔輸送性発光層と緑色電子輸送性発光層と赤色電子輸送性発光層との積層構造を有してもよい。また、有機層１２２は、赤色、緑色、青色の発光ユニットが光透過性及び導電性を有する中間層を介して積層され、電気的に直接的に接続したマルチユニット構造にしてもよい。 For example, when the emission color is white, the organic layer 122 is formed by doping the emission layer with dopant pigments of three colors of red, green, and blue. Alternatively, the organic layer 122 may have a stacked structure of a blue hole transporting light emitting layer, a green electron transporting light emitting layer, and a red electron transporting light emitting layer. The organic layer 122 may have a multi-unit structure in which red, green, and blue light-emitting units are stacked via an intermediate layer having light transmission and conductivity, and are electrically connected directly.
　第２電極層１２３は、発光面とは反対側に設けられた電極であり、例えば、有機層１２２上に設けられる。第２電極層１２３は、例えば、陰極であり、有機ＥＬ素子１０の発光時には、第１電極層１２１よりも低い電位になる。 The second electrode layer 123 is an electrode provided on the side opposite to the light emitting surface, and is provided on the organic layer 122, for example. The second electrode layer 123 is, for example, a cathode, and has a lower potential than the first electrode layer 121 when the organic EL element 10 emits light.
　第２電極層１２３は、光反射性を有する導電性材料から構成される。第２電極層１２３は、有機層１２２から発せられた光を反射し、発光面側に出射させる。第２電極層１２３は、例えば、アルミニウム、銀若しくはマグネシウム、又は、これらの少なくとも１種類を含む合金などの金属材料から構成される。例えば、第２電極層１２３は、蒸着法、塗布法、スパッタリング法、イオンビームアシスト法又はＧＣＩＢ（Ｇａｓ　Ｃｌｕｓｔｅｒ　Ｉｏｎ　Ｂｅａｍ）蒸着などによって導電膜を有機層１２２上に成膜することで形成される。例えば、第２電極層１２３の膜厚は、２０ｎｍ～２００ｎｍであり、一例として、１００ｎｍである。 The second electrode layer 123 is made of a conductive material having light reflectivity. The second electrode layer 123 reflects the light emitted from the organic layer 122 and emits it to the light emitting surface side. The second electrode layer 123 is made of a metal material such as aluminum, silver, or magnesium, or an alloy containing at least one of these. For example, the second electrode layer 123 is formed by forming a conductive film on the organic layer 122 by an evaporation method, a coating method, a sputtering method, an ion beam assist method, GCIB (Gas Cluster Ion Beam) evaporation, or the like. For example, the film thickness of the second electrode layer 123 is 20 nm to 200 nm, for example, 100 nm.
　なお、第２電極層１２３は、透光性を有する導電性材料から構成されてもよい。例えば、第２電極層１２３としては、第１電極層１２１と同じ材料を利用することができる。この場合、第２基板１１０も光透過性材料で構成されていれば、有機ＥＬ素子１０は、両面発光型の照明装置として、例えば、建物又は車両の窓などに利用することができる。 Note that the second electrode layer 123 may be made of a light-transmitting conductive material. For example, the same material as the first electrode layer 121 can be used for the second electrode layer 123. In this case, if the 2nd board | substrate 110 is also comprised with the light transmissive material, the organic EL element 10 can be utilized for a window of a building or a vehicle as a double-sided light emitting type lighting device, for example.
　絶縁層１２４は、有機層１２２の端面を覆うように設けられている。具体的には、絶縁層１２４は、有機層１２２の端面を覆うように、第１電極層１２１の端部上と第１基板１００上とに設けられる。また、図２に示すように、絶縁層１２４の端面は、第２電極層１２３によって覆われている。 The insulating layer 124 is provided so as to cover the end surface of the organic layer 122. Specifically, the insulating layer 124 is provided on the end portion of the first electrode layer 121 and on the first substrate 100 so as to cover the end face of the organic layer 122. Further, as shown in FIG. 2, the end surface of the insulating layer 124 is covered with the second electrode layer 123.
　なお、有機層１２２の端面は、有機ＥＬ素子１０の発光領域と非発光領域（いわゆる額縁）との境界部分に相当する。第２電極層１２３による被覆部の幅は、額縁幅に基づいて設定される。第２電極層１２３による被覆部の幅は、例えば、０．０５ｍｍ以上である。 Note that the end face of the organic layer 122 corresponds to a boundary portion between the light emitting region and the non-light emitting region (so-called frame) of the organic EL element 10. The width of the covering portion by the second electrode layer 123 is set based on the frame width. The width of the covering portion by the second electrode layer 123 is, for example, 0.05 mm or more.
　絶縁層１２４は、例えば、ポリイミドなどの絶縁性樹脂材料から構成される。例えば、絶縁層１２４は、絶縁性樹脂材料を塗布し、硬化することで形成される。なお、絶縁層１２４は、窒化膜などの無機材料から構成されてもよい。また、絶縁層１２４は、設けられていなくてもよい。言い換えると、有機層１２２の端面は、露出していてもよく、あるいは、第２電極層１２３によって接触して覆われていてもよい。 The insulating layer 124 is made of an insulating resin material such as polyimide, for example. For example, the insulating layer 124 is formed by applying and curing an insulating resin material. The insulating layer 124 may be made of an inorganic material such as a nitride film. Further, the insulating layer 124 is not necessarily provided. In other words, the end surface of the organic layer 122 may be exposed, or may be covered with the second electrode layer 123 in contact therewith.
　［充填材］
　充填材１３０は、有機発光部１２０を封止するための部材である。例えば、充填材１３０は、有機発光部１２０を接触して覆うように第１基板１００と第２基板１１０との間に設けられる。具体的には、充填材１３０は、第１基板１００と第２基板１１０と封止材１４０とに囲まれた空間に充填されて硬化した樹脂材料である。 [Filler]
The filler 130 is a member for sealing the organic light emitting unit 120. For example, the filler 130 is provided between the first substrate 100 and the second substrate 110 so as to cover and cover the organic light emitting unit 120. Specifically, the filler 130 is a resin material that is filled and cured in a space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140.
　充填材１３０としては、例えば、エポキシ系樹脂、アクリル系樹脂、又は、シリコーン樹脂などの光硬化性、熱硬化性又は二液硬化性の接着性樹脂を用いることができる。あるいは、充填材１３０としては、ポリエチレン、ポリプロピレンなどの酸変性物からなる熱可塑性の接着性樹脂などを用いてもよい。 As the filler 130, for example, a photocurable, thermosetting, or two-component curable adhesive resin such as an epoxy resin, an acrylic resin, or a silicone resin can be used. Alternatively, as the filler 130, a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used.
　また、充填材１３０は、乾燥剤を含んでいてもよい。乾燥剤は、例えば、水分を吸着する微細孔を有する吸湿材料であり、具体的には、酸化カルシウム（ＣａＯ）、ゼオライトなどである。乾燥剤としては、より吸湿容量の大きな材料を用いることが好ましい。 Further, the filler 130 may contain a desiccant. The desiccant is, for example, a hygroscopic material having fine pores that adsorb moisture, and specifically, calcium oxide (CaO), zeolite, and the like. As the desiccant, it is preferable to use a material having a larger moisture absorption capacity.
　充填材１３０は、樹脂材料を塗布し、硬化することで形成される。例えば、樹脂材料の粘度及び膜厚に応じて、ロールコート、スピンコート、スクリーン印刷、スプレーコート、スリットコート、スキージ塗布などの印刷法、又は、ディスペンサによる描画塗布などによって樹脂材料が塗布される。 The filler 130 is formed by applying and curing a resin material. For example, the resin material is applied by a printing method such as roll coating, spin coating, screen printing, spray coating, slit coating, squeegee coating, or drawing coating using a dispenser, depending on the viscosity and film thickness of the resin material.
　［封止材］
　封止材１４０は、第１基板１００と第２基板１１０とを接続する接続部材である。例えば、封止材１４０は、第１基板１００と第２基板１１０とを接着する接着剤である。封止材１４０は、図１に示すように、平面視において第１基板１００の外周に沿って有機発光部１２０を囲むように配置される。これにより、第１基板１００と、第２基板１１０と、封止材１４０とに囲まれた空間を封止することができる。 [Encapsulant]
The sealing material 140 is a connection member that connects the first substrate 100 and the second substrate 110. For example, the sealing material 140 is an adhesive that bonds the first substrate 100 and the second substrate 110. As shown in FIG. 1, the sealing material 140 is disposed so as to surround the organic light emitting unit 120 along the outer periphery of the first substrate 100 in a plan view. Thereby, a space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140 can be sealed.
　封止材１４０としては、例えば、エポキシ系樹脂、アクリル系樹脂、又は、シリコーン樹脂などの光硬化性、熱硬化性又は二液硬化性の接着性樹脂を用いることができる。あるいは、封止材１４０としては、ポリエチレン、ポリプロピレンなどの酸変性物からなる熱可塑性の接着性樹脂などを用いてもよい。 As the sealing material 140, for example, an epoxy resin, an acrylic resin, or a photocurable, thermosetting, or two-component curable adhesive resin such as a silicone resin can be used. Alternatively, as the sealing material 140, a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used.
　なお、封止材１４０には、無機フィラーなどを混入してもよい。これにより、外部から浸入する水分の透過率をさらに下げることができる。無機フィラーは、例えば、シリカ、水酸化カルシウム、炭酸カルシウム、その他樹脂材料などである。封止材１４０に混入される無機フィラーなどの直径（粒径）は、例えば、６μｍ～１００μｍである。 Note that an inorganic filler or the like may be mixed in the sealing material 140. Thereby, the transmittance | permeability of the water | moisture content permeating from the outside can further be reduced. Examples of the inorganic filler include silica, calcium hydroxide, calcium carbonate, and other resin materials. The diameter (particle size) of the inorganic filler or the like mixed in the sealing material 140 is, for example, 6 μm to 100 μm.
　封止材１４０としては、例えば、充填材１３０よりも粘度が高い材料を用いる。これにより、封止材１４０は、充填材１３０を塗布する際のダム材として機能する。つまり、封止材１４０を塗布した後に充填材１３０を塗布することで、充填材１３０が封止材１４０で囲まれた領域から外方へ漏れ出ないようにすることができる。 As the sealing material 140, for example, a material having a higher viscosity than the filler 130 is used. Thereby, the sealing material 140 functions as a dam material when the filler 130 is applied. That is, by applying the filler 130 after applying the sealing material 140, the filler 130 can be prevented from leaking out from the region surrounded by the sealing material 140.
　［端子部］
　続いて、本実施の形態に係る第１電極層１２１及び第２電極層１２３に給電するための端子部（引き出し電極）と、封止材１４０の詳細な構成とについて、図３～図５を用いて説明する。 [Terminal part]
Subsequently, FIGS. 3 to 5 show a terminal portion (extraction electrode) for supplying power to the first electrode layer 121 and the second electrode layer 123 according to the present embodiment and a detailed configuration of the sealing material 140. FIG. It explains using.
　図３は、本実施の形態に係る有機層１２２の露出部分を通る断面（図１のＢ－Ｂ断面）を示す概略断面図である。また、図４は、本実施の形態に係る有機層１２２の被覆部分を通る断面（図１のＣ－Ｃ断面）を示す概略断面図である。また、図５は、本実施の形態に係る封止材１４０の幅広部１４１と幅狭部１４２との境界近傍の領域（図１のＤ領域）を示す概略平面図である。 FIG. 3 is a schematic cross-sectional view showing a cross section (cross section BB in FIG. 1) passing through the exposed portion of the organic layer 122 according to the present embodiment. FIG. 4 is a schematic cross-sectional view showing a cross-section (cross-section CC in FIG. 1) passing through the covered portion of the organic layer 122 according to the present embodiment. FIG. 5 is a schematic plan view showing a region (D region in FIG. 1) near the boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 according to the present embodiment.
　第１端子部１５１及び第２端子部１５２は、封止材１４０より外側に配置される。例えば、第１端子部１５１及び第２端子部１５２は、図１に示すように、第１基板１００の周端に沿って設けられる。具体的には、平面視において、略矩形の第１基板１００の互いに対向する２つの辺のそれぞれに、第１端子部１５１及び第２端子部１５２の両方が設けられている。例えば、第１端子部１５１及び第２端子部１５２は、第１基板１００の中心を対称の中心とする点対称に配置されている。これにより、第１電極層１２１及び第２電極層１２３それぞれの面内での電圧降下を抑制し、発光の面均一性を向上させることができる。 The first terminal portion 151 and the second terminal portion 152 are disposed outside the sealing material 140. For example, the first terminal portion 151 and the second terminal portion 152 are provided along the peripheral edge of the first substrate 100 as shown in FIG. Specifically, in plan view, both the first terminal portion 151 and the second terminal portion 152 are provided on each of two opposite sides of the substantially rectangular first substrate 100. For example, the first terminal portion 151 and the second terminal portion 152 are arranged point-symmetrically with the center of the first substrate 100 as the center of symmetry. Thereby, the voltage drop in the surface of each of the first electrode layer 121 and the second electrode layer 123 can be suppressed, and the surface uniformity of light emission can be improved.
　第１端子部１５１は、第１電極層１２１に電気的に接続されている。具体的には、図３に示すように、第１端子部１５１は、第１電極層１２１の一部が延伸するように形成されている。つまり、第１端子部１５１は、第１電極層１２１と一体に形成されている。 The first terminal portion 151 is electrically connected to the first electrode layer 121. Specifically, as shown in FIG. 3, the first terminal portion 151 is formed so that a part of the first electrode layer 121 extends. That is, the first terminal portion 151 is formed integrally with the first electrode layer 121.
　第２端子部１５２は、第２電極層１２３に電気的に接続されている。具体的には、図４に示すように、第２端子部１５２から第１基板１００に沿って封止空間内に延伸した部分が、第２電極層１２３の端部に接続されている。 The second terminal portion 152 is electrically connected to the second electrode layer 123. Specifically, as shown in FIG. 4, a portion extending from the second terminal portion 152 into the sealing space along the first substrate 100 is connected to the end portion of the second electrode layer 123.
　例えば、第１端子部１５１及び第２端子部１５２としては、第１電極層１２１と同一の材料を用いることができる。具体的には、第１基板１００上に導電膜を成膜し、パターニングすることで、第１電極層１２１とともに、第１端子部１５１及び第２端子部１５２を同時に形成する。 For example, the same material as the first electrode layer 121 can be used for the first terminal portion 151 and the second terminal portion 152. Specifically, a conductive film is formed on the first substrate 100 and patterned to form the first terminal portion 151 and the second terminal portion 152 together with the first electrode layer 121 at the same time.
　図５に示すように、第２端子部１５２は、第１電極層１２１及び第１端子部１５１と離間している。具体的には、第２端子部１５２と第１電極層１２１との間、及び、第２端子部１５２と第１端子部１５１との間には、絶縁溝が形成されている。これにより、第２端子部１５２と、第１電極層１２１及び第１端子部１５１とを電気的に絶縁している。なお、絶縁溝には、絶縁材料が充填されていてもよい。 As shown in FIG. 5, the second terminal portion 152 is separated from the first electrode layer 121 and the first terminal portion 151. Specifically, insulating grooves are formed between the second terminal portion 152 and the first electrode layer 121 and between the second terminal portion 152 and the first terminal portion 151. Accordingly, the second terminal portion 152 is electrically insulated from the first electrode layer 121 and the first terminal portion 151. Note that the insulating groove may be filled with an insulating material.
　［幅広部と幅狭部］
　図１に示すように、封止材１４０は、平面視において環状に形成されている。例えば、封止材１４０は、平面視において略矩形の枠状体である。具体的には、封止材１４０は、略矩形の第１基板１００の外周に沿って略矩形の枠状に設けられている。封止材１４０は、図１に示すように、幅広部１４１と、幅狭部１４２とを有する。 [Wide part and narrow part]
As shown in FIG. 1, the sealing material 140 is formed in an annular shape in plan view. For example, the sealing material 140 is a substantially rectangular frame-like body in plan view. Specifically, the sealing material 140 is provided in a substantially rectangular frame shape along the outer periphery of the substantially rectangular first substrate 100. As illustrated in FIG. 1, the sealing material 140 includes a wide portion 141 and a narrow portion 142.
　幅広部１４１は、封止幅が幅狭部１４２より大きい第１幅広部の一例である。言い換えると、幅広部１４１は、平面視における厚さが幅狭部１４２より分厚い。封止幅は、例えば、幅広部１４１の線幅である。幅広部１４１の封止幅（線幅）は、例えば、０．１ｍｍ～１．２ｍｍである。 The wide portion 141 is an example of a first wide portion having a sealing width larger than the narrow portion 142. In other words, the wide portion 141 is thicker than the narrow portion 142 in plan view. The sealing width is, for example, the line width of the wide portion 141. The sealing width (line width) of the wide portion 141 is, for example, 0.1 mm to 1.2 mm.
　幅狭部１４２は、封止幅が幅広部１４１より小さい部分である。つまり、封止材１４０のうち、相対的に封止幅が大きい部分が幅広部１４１であり、相対的に封止幅が小さい部分が幅狭部１４２である。幅狭部１４２の封止幅（線幅）は、例えば、０．０５ｍｍ～０．６ｍｍである。 The narrow part 142 is a part having a sealing width smaller than the wide part 141. That is, in the sealing material 140, a portion having a relatively large sealing width is the wide portion 141, and a portion having a relatively small sealing width is the narrow portion 142. The sealing width (line width) of the narrow portion 142 is, for example, 0.05 mm to 0.6 mm.
　幅広部１４１及び幅狭部１４２は、例えば、ディスペンサなどによって環状に樹脂材料を描画塗布することで形成される。例えば、幅狭部１４２は、１ライン分の描画によって形成され、幅広部１４１は、２ライン分の描画によって形成される。つまり、例えば、幅広部１４１は、封止幅が幅狭部１４２の略２倍である。言い換えると、幅広部１４１の線幅が幅狭部１４２の線幅より厚く、例えば、略２倍である。 The wide portion 141 and the narrow portion 142 are formed, for example, by drawing and applying a resin material in a ring shape with a dispenser or the like. For example, the narrow portion 142 is formed by drawing for one line, and the wide portion 141 is formed by drawing for two lines. That is, for example, the wide portion 141 has a sealing width approximately twice that of the narrow portion 142. In other words, the line width of the wide portion 141 is thicker than the line width of the narrow portion 142, for example, approximately twice.
　具体的には、まず、樹脂材料を第１基板１００の外周に沿って環状の枠を描画する。次に、描画した枠の内側又は外側に接するように、枠の一部に沿って線を描画する。このとき、枠の描画と、枠の一部に沿った線の描画とにおいて、滴下量を同じにする。 Specifically, first, an annular frame is drawn along the outer periphery of the first substrate 100 with the resin material. Next, a line is drawn along a part of the frame so as to contact the inside or outside of the drawn frame. At this time, the dropping amount is made the same in drawing the frame and drawing a line along a part of the frame.
　描画終了後、かつ、第１基板１００と第２基板１１０とを貼り合わせた後に、加熱、又は、光照射することで樹脂材料を硬化する。これにより、幅広部１４１と幅狭部１４２とが形成される。 After completion of drawing and after bonding the first substrate 100 and the second substrate 110, the resin material is cured by heating or light irradiation. Thereby, the wide part 141 and the narrow part 142 are formed.
　図３に示すように、幅広部１４１は、有機層１２２の端面のうち第２電極層１２３によって覆われていない部分（すなわち、露出部）の近傍に設けられる。具体的には、幅広部１４１は、平面視において、露出部の側方に設けられる。言い換えると、幅広部１４１の側面が露出部に対向するように、幅広部１４１が形成される。このとき、幅広部１４１の側面と有機層１２２の端面との間には、絶縁層１２４及び充填材１３０が存在し、第２電極層１２３は存在しない。 As shown in FIG. 3, the wide portion 141 is provided in the vicinity of the portion of the end surface of the organic layer 122 that is not covered by the second electrode layer 123 (that is, the exposed portion). Specifically, the wide portion 141 is provided on the side of the exposed portion in plan view. In other words, the wide portion 141 is formed so that the side surface of the wide portion 141 faces the exposed portion. At this time, the insulating layer 124 and the filler 130 exist between the side surface of the wide portion 141 and the end surface of the organic layer 122, and the second electrode layer 123 does not exist.
　具体的には、幅広部１４１は、第１端子部１５１に対応する位置に配置される。例えば、図１及び図３に示すように、幅広部１４１は、第１電極層１２１と第１端子部１５１との間の延伸部分上に設けられる。 Specifically, the wide portion 141 is disposed at a position corresponding to the first terminal portion 151. For example, as shown in FIGS. 1 and 3, the wide portion 141 is provided on the extended portion between the first electrode layer 121 and the first terminal portion 151.
　一方で、図４に示すように、幅狭部１４２は、有機層１２２の端面のうち第２電極層１２３によって覆われている部分（すなわち、被覆部）の近傍に設けられる。具体的には、幅狭部１４２は、平面視において、被覆部の側方に設けられる。言い換えると、幅狭部１４２の側面が被覆部に対向するように、幅狭部１４２が形成される。このとき、幅狭部１４２の側面と有機層１２２の端面との間には、絶縁層１２４、第２電極層１２３及び充填材１３０が存在する。 On the other hand, as shown in FIG. 4, the narrow portion 142 is provided in the vicinity of the portion of the end face of the organic layer 122 that is covered with the second electrode layer 123 (that is, the covering portion). Specifically, the narrow portion 142 is provided on the side of the covering portion in plan view. In other words, the narrow portion 142 is formed so that the side surface of the narrow portion 142 faces the covering portion. At this time, the insulating layer 124, the second electrode layer 123, and the filler 130 exist between the side surface of the narrow portion 142 and the end surface of the organic layer 122.
　具体的には、幅狭部１４２は、第２端子部１５２に対応する位置に配置される。例えば、図１及び図４に示すように、幅狭部１４２は、第２端子部１５２の延伸部分上に設けられる。 Specifically, the narrow portion 142 is disposed at a position corresponding to the second terminal portion 152. For example, as shown in FIGS. 1 and 4, the narrow portion 142 is provided on the extended portion of the second terminal portion 152.
　有機層１２２の露出部と被覆部との境界では、図５に示すように、平面視において、第２電極層１２３の端面に段差が生じている。境界は、例えば、第１端子部１５１と第２端子部１５２との間に設けられる。 At the boundary between the exposed portion and the covering portion of the organic layer 122, a step is generated on the end surface of the second electrode layer 123 in plan view as shown in FIG. The boundary is provided, for example, between the first terminal unit 151 and the second terminal unit 152.
　また、有機層１２２の露出部と被覆部との境界に対応して、封止材１４０の幅広部１４１と幅狭部１４２との境界が設けられる。例えば、封止材１４０の幅広部１４１と幅狭部１４２との境界が、有機層１２２の露出部と被覆部との境界と略同一直線上になるように、封止材１４０が設けられる。例えば、幅広部１４１と幅狭部１４２との境界が第１端子部１５１と第２端子部１５２との間に設けられる。つまり、幅広部１４１と第２端子部１５２とは離間している。 Also, a boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 is provided corresponding to the boundary between the exposed portion and the covering portion of the organic layer 122. For example, the sealing material 140 is provided so that the boundary between the wide portion 141 and the narrow portion 142 of the sealing material 140 is substantially collinear with the boundary between the exposed portion and the covering portion of the organic layer 122. For example, the boundary between the wide portion 141 and the narrow portion 142 is provided between the first terminal portion 151 and the second terminal portion 152. That is, the wide portion 141 and the second terminal portion 152 are separated from each other.
　なお、本実施の形態では、幅狭部１４２は、第２端子部１５２の延伸部分上だけでなく、第１端子部１５１及び第２端子部１５２が設けられていない部分にも設けられている。例えば、図１に示す概略平面図において、封止材１４０の紙面上側及び下側の部分が幅狭部１４２である。具体的には、図２に示すＡ－Ａ断面においても、有機層１２２の端面は第２電極層１２３によって覆われており、この被覆部の近傍に幅狭部１４２が設けられている。 In the present embodiment, the narrow portion 142 is provided not only on the extended portion of the second terminal portion 152 but also on the portion where the first terminal portion 151 and the second terminal portion 152 are not provided. . For example, in the schematic plan view shown in FIG. 1, the upper and lower portions of the sealing material 140 are the narrow portions 142. Specifically, also in the AA cross section shown in FIG. 2, the end surface of the organic layer 122 is covered with the second electrode layer 123, and a narrow portion 142 is provided in the vicinity of the covering portion.
　［効果など］
　有機ＥＬ素子１０の寿命を長くするためには、有機層１２２を水分から保護する必要がある。具体的には、水分が有機層１２２に到達するのに要する時間が長くなる程、有機層１２２の劣化の進行が遅くなり、有機ＥＬ素子１０の寿命を長くすることができる。 [Effects, etc.]
In order to extend the lifetime of the organic EL element 10, it is necessary to protect the organic layer 122 from moisture. Specifically, the longer the time required for moisture to reach the organic layer 122, the slower the deterioration of the organic layer 122, and the longer the life of the organic EL element 10.
　ここで、水分の浸入経路に注目すると、第１基板１００と第２基板１１０との間から浸入する水分が、有機ＥＬ素子１０の長寿命化を実現する際に問題となる。なお、第１基板１００及び第２基板１１０は、水分の透過性の低い、すなわち、防水性に優れたガラスなどで構成されているので、第１基板１００及び第２基板１１０を透過する水分は考慮に入れなくてもよい。 Here, when attention is paid to the moisture intrusion route, the moisture that enters from between the first substrate 100 and the second substrate 110 becomes a problem when the life of the organic EL element 10 is extended. Since the first substrate 100 and the second substrate 110 are made of glass having a low moisture permeability, that is, excellent in waterproofness, the moisture transmitted through the first substrate 100 and the second substrate 110 is It does not have to be taken into account.
　図２に示すように、第１基板１００と第２基板１１０との間から浸入する水分は、封止材１４０と、充填材１３０と、絶縁層１２４と、第２電極層１２３（有機層１２２の端面の被覆部の場合）とを浸透して、有機層１２２に到達する。したがって、封止材１４０から有機層１２２までの距離を長くすることで、水分が浸透する時間を長くすることができる。例えば、絶縁層１２４、充填材１３０及び封止材１４０の幅を大きくすればよい。 As shown in FIG. 2, moisture that enters from between the first substrate 100 and the second substrate 110 includes the sealing material 140, the filler 130, the insulating layer 124, and the second electrode layer 123 (organic layer 122). And the organic layer 122 is reached. Therefore, by increasing the distance from the sealing material 140 to the organic layer 122, the time for moisture to penetrate can be increased. For example, the widths of the insulating layer 124, the filler 130, and the sealing material 140 may be increased.
　ところで、近年は、有機ＥＬ素子１０には、狭額縁化が求められる。特に、複数の有機ＥＬ素子１０を並べて配置する場合には、有機ＥＬ素子１０の額縁部分が互いに隣接し、非発光領域が大きくなる。したがって、狭額縁化を実現するためには、封止材１４０から有機層１２２までの距離を単純に大きくすることはできない。 Incidentally, in recent years, the organic EL element 10 is required to have a narrow frame. In particular, when the plurality of organic EL elements 10 are arranged side by side, the frame portions of the organic EL elements 10 are adjacent to each other, and the non-light-emitting region becomes large. Therefore, in order to realize a narrow frame, the distance from the sealing material 140 to the organic layer 122 cannot be simply increased.
　そこで、上述したように、本実施の形態に係る有機ＥＬ素子１０は、互いに対向配置された第１基板１００及び第２基板１１０と、第１基板１００と第２基板１１０との間に設けられた有機発光部１２０と、有機発光部１２０を囲むように配置され、第１基板１００と第２基板１１０とを接着する封止材１４０とを備え、有機発光部１２０は、互いに対向配置された第１電極層１２１及び第２電極層１２３と、第１電極層１２１と第２電極層１２３との間に設けられた、発光層を含む有機層１２２とを含み、封止材１４０は、幅狭部１４２と、幅狭部１４２より封止幅が大きい幅広部１４１とを有し、幅広部１４１は、有機層１２２の端面のうち第２電極層１２３によって覆われていない部分の近傍に設けられている。 Therefore, as described above, the organic EL element 10 according to the present embodiment is provided between the first substrate 100 and the second substrate 110 that are disposed to face each other, and between the first substrate 100 and the second substrate 110. The organic light emitting unit 120 and the sealing member 140 that bonds the first substrate 100 and the second substrate 110 are disposed so as to surround the organic light emitting unit 120, and the organic light emitting units 120 are disposed to face each other. Including a first electrode layer 121 and a second electrode layer 123, and an organic layer 122 including a light emitting layer provided between the first electrode layer 121 and the second electrode layer 123, and the sealing material 140 has a width The narrow portion 142 and the wide portion 141 having a larger sealing width than the narrow portion 142 are provided, and the wide portion 141 is provided in the vicinity of a portion of the end surface of the organic layer 122 that is not covered by the second electrode layer 123. It has been.
　例えば、図３に示すように、有機層１２２の端面のうち第２電極層１２３によって覆われていない露出部の近傍に幅広部１４１が設けられているので、水分が幅広部１４１を浸透するのに要する時間を長くすることができる。したがって、有機ＥＬ素子１０の寿命を長くすることができる。 For example, as shown in FIG. 3, the wide portion 141 is provided in the vicinity of the exposed portion of the end face of the organic layer 122 that is not covered by the second electrode layer 123, so that moisture permeates the wide portion 141. The time required for this can be lengthened. Therefore, the lifetime of the organic EL element 10 can be extended.
　また、露出部の近傍に封止幅が大きい幅広部１４１を設け、他の部分には、封止幅が小さい幅狭部１４２を設けることで、必要以上に封止材１４０が太くなることを抑制し、狭額縁化を実現することもできる。また、封止材１４０は、全体が幅広部１４１で構成されずに、幅狭部１４２を有するので、封止材１４０として利用する材料を削減することができ、コストを削減することもできる。つまり、露出部の近傍のみに幅広部１４１を設け、その他の部分には幅狭部１４２を設けることで、材料を削減し、コストを削減することができる。 Further, by providing the wide portion 141 having a large sealing width in the vicinity of the exposed portion and providing the narrow portion 142 having a small sealing width in the other portion, the sealing material 140 becomes thicker than necessary. It is possible to suppress and realize a narrow frame. Moreover, since the sealing material 140 does not include the wide portion 141 as a whole but has the narrow portion 142, the material used as the sealing material 140 can be reduced, and the cost can be reduced. That is, the wide portion 141 is provided only in the vicinity of the exposed portion, and the narrow portion 142 is provided in other portions, so that the material can be reduced and the cost can be reduced.
　また、例えば、有機層１２２の端面のうち幅狭部１４２の近傍部分は、第２電極層１２３によって覆われている。 Also, for example, the vicinity of the narrow portion 142 in the end face of the organic layer 122 is covered with the second electrode layer 123.
　例えば、図４に示すように、有機層１２２の端面のうち第２電極層１２３によって覆われている。このため、水分が封止材１４０を浸透する時間が短くても、封止空間内に浸入した水分は第２電極層１２３を浸透するのに時間を要する。したがって、有機層１２２の端面の被覆部近傍に幅狭部１４２を設けることで、有機ＥＬ素子１０の寿命を長くし、かつ、狭額縁化を実現することができる。 For example, as shown in FIG. 4, the end surface of the organic layer 122 is covered with the second electrode layer 123. For this reason, even if the time for moisture to penetrate the sealing material 140 is short, it takes time for the moisture that has entered the sealing space to penetrate the second electrode layer 123. Therefore, by providing the narrow portion 142 in the vicinity of the covering portion on the end face of the organic layer 122, it is possible to extend the life of the organic EL element 10 and realize a narrow frame.
　また、例えば、有機ＥＬ素子１０は、さらに、第１電極層１２１に電気的に接続され、封止材１４０の外側に配置された第１端子部１５１と、第２電極層１２３に電気的に接続され、封止材１４０の外側に配置された第２端子部１５２とを備え、幅広部１４１は、第１端子部１５１の近傍に設けられ、幅狭部１４２は、第２端子部１５２の近傍に設けられる。 Further, for example, the organic EL element 10 is further electrically connected to the first electrode layer 121 and electrically connected to the first terminal portion 151 and the second electrode layer 123 disposed outside the sealing material 140. And a second terminal portion 152 disposed outside the sealing material 140, the wide portion 141 is provided in the vicinity of the first terminal portion 151, and the narrow portion 142 is the second terminal portion 152 of the second terminal portion 152. It is provided in the vicinity.
　第１電極層１２１に接続する第１端子部１５１を設けるためには、有機層１２２の端面が露出せざるを得なくなる。有機層１２２の端面を第２電極層１２３で覆うと、第２電極層１２３が第１電極層１２１に接触し、電気的に短絡する。このため、第１端子部１５１の近傍には、有機層１２２の端面が露出している部分が存在するので、第１端子部１５１の近傍に幅広部１４１を設けることで、適切に有機層１２２を保護することができる。したがって、有機ＥＬ素子１０の寿命を長くすることができる。 In order to provide the first terminal portion 151 connected to the first electrode layer 121, the end face of the organic layer 122 must be exposed. When the end surface of the organic layer 122 is covered with the second electrode layer 123, the second electrode layer 123 comes into contact with the first electrode layer 121 and is electrically short-circuited. For this reason, there is a portion where the end surface of the organic layer 122 is exposed in the vicinity of the first terminal portion 151, and therefore, by providing the wide portion 141 in the vicinity of the first terminal portion 151, the organic layer 122 can be appropriately formed. Can be protected. Therefore, the lifetime of the organic EL element 10 can be extended.
　また、例えば、幅広部１４１と第２端子部１５２とは、離間している。 Also, for example, the wide portion 141 and the second terminal portion 152 are separated from each other.
　これにより、第２端子部１５２と幅広部１４１とを適切に配置することができ、狭額縁化を実現し、また、デザイン性を高めることができる。 Thereby, the 2nd terminal part 152 and the wide part 141 can be arrange | positioned appropriately, a narrow frame can be implement | achieved and design property can be improved.
　（実施の形態２）
　続いて、実施の形態２に係る有機ＥＬ素子について、図６～図８を用いて説明する。 (Embodiment 2)
Next, the organic EL element according to Embodiment 2 will be described with reference to FIGS.
　図６は、本実施の形態に係る有機ＥＬ素子２０を示す概略平面図である。図７は、本実施の形態に係る有機層１２２の露出部分を通る断面（図６のＥ－Ｅ断面）を示す概略断面図である。図８は、本実施の形態に係る封止材２４０の幅広部２４１と幅狭部１４２との境界近傍の領域（図６のＦ領域）を示す概略平面図である。 FIG. 6 is a schematic plan view showing the organic EL element 20 according to the present embodiment. FIG. 7 is a schematic cross-sectional view showing a cross-section (cross-section EE in FIG. 6) passing through the exposed portion of the organic layer 122 according to the present embodiment. FIG. 8 is a schematic plan view showing a region (F region in FIG. 6) in the vicinity of the boundary between the wide portion 241 and the narrow portion 142 of the sealing material 240 according to the present embodiment.
　本実施の形態に係る有機ＥＬ素子２０は、図１に示す有機ＥＬ素子１０と比較して、封止材１４０の代わりに封止材２４０を備える点が異なっている。具体的には、封止材２４０は、幅広部１４１の代わりに、幅広部２４１を備える。以下では、異なる点を中心に説明する。 The organic EL element 20 according to the present embodiment is different from the organic EL element 10 shown in FIG. 1 in that a sealing material 240 is provided instead of the sealing material 140. Specifically, the sealing material 240 includes a wide portion 241 instead of the wide portion 141. Below, it demonstrates focusing on a different point.
　幅広部２４１は、図６及び図７に示すように、内部に空間２４３を有する。空間２４３は、密閉空間である。 As shown in FIGS. 6 and 7, the wide portion 241 has a space 243 inside. The space 243 is a sealed space.
　空間２４３は、例えば、図６に示すように、略線状に設けられている。具体的には、幅広部２４１の長手方向に沿った線状に設けられている。空間２４３は、図７に示すように、幅広部２４１の中央部分に設けられている。 The space 243 is provided in a substantially linear shape, for example, as shown in FIG. Specifically, it is provided in a line shape along the longitudinal direction of the wide portion 241. As shown in FIG. 7, the space 243 is provided in the central portion of the wide portion 241.
　例えば、実施の形態１と同様に、幅広部２４１は、２ライン分の描画によって形成される。具体的には、まず、樹脂材料を第１基板１００の外周に沿って環状の枠を描画する。次に、描画した枠の内側又は外側に、所定距離だけ離間させて、枠の一部に沿って線を描画する。つまり、枠の一部と線とが平行になるように描画する。なお、このとき、図８に示すように、線の端部は、枠に接するように描画する。これにより、所定距離の幅を有する略線状の空間２４３が形成される。 For example, as in the first embodiment, the wide portion 241 is formed by drawing for two lines. Specifically, first, an annular frame is drawn on the resin material along the outer periphery of the first substrate 100. Next, a line is drawn along a part of the frame at a predetermined distance inside or outside the drawn frame. That is, drawing is performed so that a part of the frame is parallel to the line. At this time, as shown in FIG. 8, the end of the line is drawn in contact with the frame. Thereby, a substantially linear space 243 having a width of a predetermined distance is formed.
　描画終了後、かつ、第１基板１００と第２基板１１０とを貼り合わせた後に、加熱、又は、光照射することで樹脂材料を硬化する。これにより、内部に空間２４３を有する幅広部２４１と幅狭部１４２とが形成される。なお、言い換えれば、幅広部２４１は、互いに離間して描画された２本の幅狭部と、２本の幅狭部の間の空間とを有する。例えば、空間２４３は、０．０５ｍｍ～０．５ｍｍの線幅で形成される。 After completion of drawing and after bonding the first substrate 100 and the second substrate 110, the resin material is cured by heating or light irradiation. Thereby, the wide part 241 and the narrow part 142 which have the space 243 inside are formed. In other words, the wide portion 241 has two narrow portions drawn apart from each other and a space between the two narrow portions. For example, the space 243 is formed with a line width of 0.05 mm to 0.5 mm.
　なお、第１基板１００と第２基板１１０との貼り合わせは、例えば、大気圧より低い減圧下で行われる。例えば、真空貼り合わせ装置の真空槽を真空状態にした後で、第１基板１００と第２基板１１０とを貼り合わせる。真空状態とは、十分な減圧状態であり、例えば、真空度が０．１Ｐａの状態である。 Note that the bonding of the first substrate 100 and the second substrate 110 is performed under a reduced pressure lower than atmospheric pressure, for example. For example, after the vacuum chamber of the vacuum bonding apparatus is evacuated, the first substrate 100 and the second substrate 110 are bonded together. The vacuum state is a sufficiently reduced pressure state, for example, a state where the degree of vacuum is 0.1 Pa.
　したがって、空間２４３は、減圧下（具体的には、真空状態）である。このため、空間２４３に浸入した水分は、空間２４３内に閉じ込められる。したがって、水分が封止空間内に浸入するのを遅らせることができるので、有機ＥＬ素子２０の寿命を長くすることができる。 Therefore, the space 243 is under reduced pressure (specifically, a vacuum state). Therefore, moisture that has entered the space 243 is confined in the space 243. Therefore, since it is possible to delay the entry of moisture into the sealed space, the life of the organic EL element 20 can be extended.
　以上のように、本実施の形態に係る有機ＥＬ素子２０では、幅広部２４１は、内部に空間２４３を有する。 As described above, in the organic EL element 20 according to the present embodiment, the wide portion 241 has the space 243 inside.
　これにより、幅広部２４１を浸透した水分が空間２４３に閉じ込められるため、水分が封止空間内に浸入するのを遅らせることができる。したがって、有機ＥＬ素子２０の寿命を長くすることができる。 Thereby, since the water permeating through the wide part 241 is confined in the space 243, it is possible to delay the ingress of the water into the sealed space. Therefore, the lifetime of the organic EL element 20 can be extended.
　（変形例）
　ここで、実施の形態２の変形例について、図９を用いて説明する。図９は、本変形例に係る有機層１２２の露出部分を通る断面（図６のＥ－Ｅ断面に相当）を示す概略断面図である。 (Modification)
Here, a modification of the second embodiment will be described with reference to FIG. FIG. 9 is a schematic cross-sectional view showing a cross section (corresponding to the EE cross section of FIG. 6) passing through the exposed portion of the organic layer 122 according to this modification.
　本変形例に係る有機ＥＬ素子２１では、実施の形態２に係る幅広部２４１の空間２４３に充填材２４４が充填されている。充填材２４４は、例えば、乾燥剤を含む樹脂材料から構成される。乾燥剤は、例えば、水分を吸着する微細孔を有する吸湿材料であり、具体的には、酸化カルシウム（ＣａＯ）、ゼオライトなどである。乾燥剤としては、より吸湿容量の大きな材料を用いることが好ましい。樹脂材料は、例えば、水分透過量（透湿量）などの少ない材料であり、具体的には、エポキシ樹脂などである。 In the organic EL element 21 according to this modification, the filler 244 is filled in the space 243 of the wide portion 241 according to the second embodiment. The filler 244 is made of a resin material containing a desiccant, for example. The desiccant is, for example, a hygroscopic material having fine pores that adsorb moisture, and specifically, calcium oxide (CaO), zeolite, and the like. As the desiccant, it is preferable to use a material having a larger moisture absorption capacity. The resin material is, for example, a material having a small amount of moisture permeation (moisture permeability), and specifically, an epoxy resin or the like.
　例えば、上述したように空間２４３を形成した後、第１基板１００と第２基板１１０とを貼り合わせる前に、ディスペンサなどを用いて空間２４３内に乾燥剤を含む樹脂材料を充填する。その後、加熱、又は、光照射によって硬化されることで、充填材２４４が形成される。例えば、樹脂材料は、描画塗布、液滴などによって空間２４３内に充填される。 For example, after forming the space 243 as described above, before the first substrate 100 and the second substrate 110 are bonded together, a resin material containing a desiccant is filled in the space 243 using a dispenser or the like. Thereafter, the filler 244 is formed by being cured by heating or light irradiation. For example, the resin material is filled in the space 243 by drawing coating, droplets, or the like.
　以上のように、本実施の形態の変形例に係る有機ＥＬ素子２１では、空間２４３には、充填材２４４が充填されている。 As described above, in the organic EL element 21 according to the modification of the present embodiment, the space 243 is filled with the filler 244.
　これにより、例えば、充填材２４４内に乾燥剤を含めることで、空間２４３内に浸入した水分を吸着することができる。したがって、封止空間内に水分が浸入するのをより遅らせることができるので、有機ＥＬ素子２１の寿命をさらに長くすることができる。 Thereby, for example, by including a desiccant in the filler 244, moisture that has entered the space 243 can be adsorbed. Therefore, since it is possible to further delay the entry of moisture into the sealed space, the life of the organic EL element 21 can be further extended.
　（実施の形態３）
　続いて、実施の形態３に係る有機ＥＬ素子３０について、図１０を用いて説明する。図１０は、本実施の形態に係る有機ＥＬ素子３０の角部分を示す概略平面図である。 (Embodiment 3)
Next, the organic EL element 30 according to Embodiment 3 will be described with reference to FIG. FIG. 10 is a schematic plan view showing a corner portion of the organic EL element 30 according to the present embodiment.
　本実施の形態に係る有機ＥＬ素子３０は、図１に示す有機ＥＬ素子１０と比較して、封止材１４０の代わりに、封止材３４０を備える点が異なっている。具体的には、封止材３４０は、さらに、幅広部３４１を備える。以下では、異なる点を中心に説明する。 The organic EL element 30 according to the present embodiment is different from the organic EL element 10 shown in FIG. 1 in that a sealing material 340 is provided instead of the sealing material 140. Specifically, the sealing material 340 further includes a wide portion 341. Below, it demonstrates focusing on a different point.
　幅広部３４１は、封止材３４０の角（コーナー）部に設けられる。幅広部３４１は、封止幅が幅狭部１４２より大きい第２幅広部の一例である。封止幅は、例えば、０．１ｍｍ～０．６ｍｍである。 The wide portion 341 is provided at a corner portion of the sealing material 340. The wide portion 341 is an example of a second wide portion having a sealing width larger than that of the narrow portion 142. The sealing width is, for example, 0.1 mm to 0.6 mm.
　幅広部３４１は、例えば、ディスペンサなどによって樹脂材料を描画塗布することで形成される。例えば、幅広部３４１は、２ライン以上分の描画によって形成される。具体的には、実施の形態１と同様に環状の枠を描画した後、枠の角の内側又は外側に点描する。これにより、封止材３４０は、角部分の封止幅を他より大きくすることができる。 The wide portion 341 is formed, for example, by drawing and applying a resin material with a dispenser or the like. For example, the wide portion 341 is formed by drawing for two lines or more. Specifically, after drawing an annular frame in the same manner as in the first embodiment, it is pointed inside or outside the corner of the frame. Thereby, the sealing material 340 can make the sealing width of a corner | angular part larger than others.
　本実施の形態では、有機層１２２の平面視形状は、略矩形である。このため、有機層１２２は、平面視において角が形成されている。具体的には、有機層１２２は、四隅に略９０度の角部を有する。 In the present embodiment, the planar view shape of the organic layer 122 is substantially rectangular. For this reason, the organic layer 122 has corners in plan view. Specifically, the organic layer 122 has corner portions of approximately 90 degrees at the four corners.
　角部分では、水分の浸入経路が他の部分より多い。例えば、有機層１２２の辺の中央部分では、一方向から水分が浸入するのに対して、有機層１２２の略９０度の角を構成する２辺の双方から水分が浸入する。例えば、図１０に示すように紙面上における右下の角部分では、下側からと右側からとの２方向から水分が浸入する。したがって、有機層１２２の劣化が他の部分より早く進行する。 In the corner part, there are more moisture intrusion routes than in other parts. For example, in the central portion of the side of the organic layer 122, moisture enters from one direction, whereas moisture enters from both of the two sides constituting the approximately 90 degree corner of the organic layer 122. For example, as shown in FIG. 10, in the lower right corner portion on the paper surface, moisture enters from two directions, from the lower side and from the right side. Therefore, the deterioration of the organic layer 122 proceeds faster than other portions.
　そこで、本実施の形態に係る有機ＥＬ素子３０では、有機発光部１２０は、平面視において略矩形であり、封止材３４０は、平面視において略矩形の枠状体であり、さらに、枠状体の角部に設けられた、幅狭部１４２より封止幅が大きい幅広部３４１を有する。 Therefore, in the organic EL element 30 according to the present embodiment, the organic light emitting unit 120 is substantially rectangular in a plan view, and the sealing material 340 is a substantially rectangular frame-like body in a plan view. A wide portion 341 is provided at a corner of the body and has a larger sealing width than the narrow portion 142.
　これにより、角部分での封止材３４０の封止幅を大きくすることで、角部分への水分の浸入を遅らせることができる。したがって、有機ＥＬ素子３０の寿命を長くすることができる。 Thus, by increasing the sealing width of the sealing material 340 at the corner portion, it is possible to delay the entry of moisture into the corner portion. Therefore, the lifetime of the organic EL element 30 can be extended.
　なお、上述したように、角部分での水分の浸入をさらに遅らせるため、本実施の形態では、有機層１２２の角部分を第２電極層１２３が覆っていてもよい。つまり、第１端子部１５１は、第１電極層１２１に対してオフセット配置されている。具体的には、図１０に示すように、第１端子部１５１と第１電極層１２１とによって平面視において段差が形成されるように、第１端子部１５１が配置されている。 Note that, as described above, the second electrode layer 123 may cover the corner portion of the organic layer 122 in this embodiment in order to further delay the intrusion of moisture at the corner portion. That is, the first terminal portion 151 is offset with respect to the first electrode layer 121. Specifically, as shown in FIG. 10, the first terminal portion 151 is arranged such that a step is formed by the first terminal portion 151 and the first electrode layer 121 in plan view.
　また、図１０に示すように、幅広部３４１の一部が第２電極層１２３の角部を覆っていてもよい。 Further, as shown in FIG. 10, a part of the wide part 341 may cover the corner part of the second electrode layer 123.
　（実施の形態４）
　続いて、実施の形態４に係る有機ＥＬ素子４０について、図１１を用いて説明する。図１１は、本実施の形態に係る有機ＥＬ素子４０の端子部を通る断面を示す概略断面図である。図１１は、例えば、図１に示すＢ－Ｂ断面又はＣ－Ｃ断面に相当する。 (Embodiment 4)
Next, the organic EL element 40 according to Embodiment 4 will be described with reference to FIG. FIG. 11 is a schematic cross-sectional view showing a cross section passing through the terminal portion of the organic EL element 40 according to the present embodiment. FIG. 11 corresponds to, for example, the BB cross section or CC cross section shown in FIG.
　本実施の形態に係る有機ＥＬ素子４０は、図２に示す有機ＥＬ素子１０と比較して、新たに、端子保護部４６０を備える点が異なっている。以下では、異なる点を中心に説明する。 The organic EL element 40 according to the present embodiment is different from the organic EL element 10 shown in FIG. 2 in that a terminal protection unit 460 is newly provided. Below, it demonstrates focusing on a different point.
　端子保護部４６０は、例えば、樹脂材料であり、第１端子部１５１及び第２端子部１５２を覆っている。具体的には、端子保護部４６０は、第１端子部１５１又は第２端子部１５２に回路実装及び端子圧着などの施工を施した後、樹脂材料を塗布し、硬化させることで形成される。回路実装及び端子圧着は、例えば、半田付け、ワイヤーボンディング、銀ペーストの塗布などである。 The terminal protection part 460 is, for example, a resin material and covers the first terminal part 151 and the second terminal part 152. Specifically, the terminal protection unit 460 is formed by applying a resin material and curing the first terminal unit 151 or the second terminal unit 152 after performing circuit mounting and terminal crimping. Circuit mounting and terminal crimping are, for example, soldering, wire bonding, silver paste application, and the like.
　端子保護部４６０としては、絶縁性の樹脂材料を用いることができ、例えば、エポキシ系樹脂、アクリル系樹脂、又は、シリコーン樹脂などの光硬化性、熱硬化性又は二液硬化性の接着性樹脂を用いることができる。あるいは、端子保護部４６０としては、ポリエチレン、ポリプロピレンなどの酸変性物からなる熱可塑性の接着性樹脂などを用いてもよい。樹脂材料は、例えば、描画塗布、液滴などによって塗布される。 As the terminal protection unit 460, an insulating resin material can be used. For example, an epoxy resin, an acrylic resin, a silicone resin, or other photo-curing, thermosetting, or two-component curable adhesive resin. Can be used. Alternatively, as the terminal protection unit 460, a thermoplastic adhesive resin made of an acid-modified product such as polyethylene or polypropylene may be used. The resin material is applied by, for example, drawing application or droplets.
　封止材１４０から第１基板１００の端面までの距離は、例えば、０．３ｍｍ～０．５ｍｍである。端子保護部４６０は、第１基板１００と第２基板１１０との間を埋めるように充填され、硬化されて形成される。 The distance from the sealing material 140 to the end surface of the first substrate 100 is, for example, 0.3 mm to 0.5 mm. The terminal protection unit 460 is filled and cured so as to fill the space between the first substrate 100 and the second substrate 110.
　以上のように、本実施の形態に係る有機ＥＬ素子４０は、さらに、第１端子部１５１及び第２端子部１５２を保護する端子保護部４６０を備える。 As described above, the organic EL element 40 according to the present embodiment further includes the terminal protection unit 460 that protects the first terminal unit 151 and the second terminal unit 152.
　これにより、第１端子部１５１及び第２端子部１５２を保護するためだけでなく、端子保護部４６０は、水分の浸入を抑制することもできる。したがって、有機ＥＬ素子４０の寿命をより長くすることができる。 Thus, not only to protect the first terminal portion 151 and the second terminal portion 152 but also the terminal protection portion 460 can suppress the ingress of moisture. Therefore, the lifetime of the organic EL element 40 can be further extended.
　（実施の形態５）
　続いて、実施の形態５に係る照明装置について、図１２を用いて説明する。 (Embodiment 5)
Next, the lighting apparatus according to Embodiment 5 will be described with reference to FIG.
　図１２は、本実施の形態に係る照明装置５０を示す概観斜視図である。 FIG. 12 is an overview perspective view showing the illumination device 50 according to the present embodiment.
　図１２に示す照明装置５０は、例えば、有機ＥＬ素子１０を備える。例えば、照明装置５０は、複数の有機ＥＬ素子１０からなる発光部５１と、発光部５１を天井に設置するための吊具５２と、発光部５１と吊具５２とを繋ぐ電源コード５３とを備える。 12 includes, for example, the organic EL element 10. For example, the illuminating device 50 includes a light emitting unit 51 including a plurality of organic EL elements 10, a hanging tool 52 for installing the light emitting unit 51 on a ceiling, and a power cord 53 that connects the light emitting unit 51 and the hanging tool 52. Prepare.
　発光部５１は、例えば、複数の有機ＥＬ素子１０が互いに隣接するように複数並べて構成される。また、発光部５１は、その端部が灯具ケース５４で覆われて保護される。吊具５２は、その表面にリモコン（図示せず）から送信されたリモコン信号を受信するためのリモコン受光部５５を有する。 The light emitting unit 51 is configured by arranging a plurality of the organic EL elements 10 so as to be adjacent to each other, for example. Further, the end of the light emitting unit 51 is covered and protected by the lamp case 54. The hanger 52 has a remote control light receiving unit 55 for receiving a remote control signal transmitted from a remote control (not shown) on the surface thereof.
　以上のように、本実施の形態に係る照明装置５０は、例えば、実施の形態１に係る有機ＥＬ素子１０を備える。このため、本実施の形態に係る照明装置５０は、実施の形態１と同様の効果を奏する。すなわち、有機ＥＬ素子１０の寿命を長くすることができ、長寿命の照明装置５０を実現することができる。 As described above, the illumination device 50 according to the present embodiment includes, for example, the organic EL element 10 according to the first embodiment. For this reason, the illuminating device 50 which concerns on this Embodiment has an effect similar to Embodiment 1. FIG. That is, the lifetime of the organic EL element 10 can be extended, and the long-life lighting device 50 can be realized.
　なお、照明装置５０は、天井に吊り下げられる構成に限らず、壁に設置される構成であっても同等の効果を得ることができる。 The lighting device 50 is not limited to a configuration that is suspended from the ceiling, and the same effect can be obtained even when the configuration is installed on a wall.
　（その他）
　以上、本発明に係る有機ＥＬ素子及び照明装置について、上記実施の形態及びその変形例に基づいて説明したが、本発明は、上記の実施の形態に限定されるものではない。 (Other)
As mentioned above, although the organic EL element and the illuminating device according to the present invention have been described based on the above embodiment and the modifications thereof, the present invention is not limited to the above embodiment.
　例えば、上記の実施の形態では、第１基板１００と第２基板１１０と封止材１４０とによって囲まれる空間内に充填材１３０を充填する密封封止構造を採用しているが、これに限らない。有機発光部１２０を封止する構造は、いかなる形態でもよい。以下では、図１３Ａ～図１３Ｄを用いて、封止構造の例をいくつか説明する。図１３Ａ～図１３Ｄは、本実施の形態の変形例に係る有機ＥＬ素子の封止構造の一例を示す図である。 For example, in the above-described embodiment, the hermetically sealing structure in which the filler 130 is filled in the space surrounded by the first substrate 100, the second substrate 110, and the sealing material 140 is not limited thereto. Absent. The structure for sealing the organic light emitting unit 120 may be in any form. Hereinafter, some examples of the sealing structure will be described with reference to FIGS. 13A to 13D. 13A to 13D are diagrams showing an example of a sealing structure of an organic EL element according to a modification of the present embodiment.
　例えば、図１３Ａに示す有機ＥＬ素子６０では、封止空間内に充填材１３０が充填される代わりに、シート乾燥剤６３０が設けられている。シート乾燥剤６３０は、例えば、吸湿性を有する基材を両面からフィルムなどでラミネートした部材である。 For example, in the organic EL element 60 shown in FIG. 13A, a sheet desiccant 630 is provided instead of filling the filler 130 in the sealed space. The sheet desiccant 630 is, for example, a member obtained by laminating a hygroscopic substrate from both sides with a film or the like.
　また、第２基板１１０の代わりに、主面に凹部が設けられた第２基板６１０が用いられている。例えば、第２基板６１０は、掘り込みガラスから構成される。シート乾燥剤６３０は、第２基板６１０の凹部に設けられている。 Further, in place of the second substrate 110, a second substrate 610 having a main surface provided with a recess is used. For example, the second substrate 610 is made of dug glass. The sheet desiccant 630 is provided in the recess of the second substrate 610.
　また、図１３Ｂに示す有機ＥＬ素子６１では、封止空間内に充填材１３０が充填される代わりに、塗布型乾燥剤６３１が設けられている。塗布型乾燥剤６３１は、例えば、乾燥剤入りの樹脂などである。 Further, in the organic EL element 61 shown in FIG. 13B, a coating-type desiccant 631 is provided instead of filling the filler 130 in the sealed space. The coating-type desiccant 631 is, for example, a resin containing a desiccant.
　また、第２基板１１０の代わりに、主面に凹部が設けられた第２基板６１１が用いられている。例えば、第２基板６１１は、掘り込みガラスから構成される。塗布型乾燥剤６３１は、第２基板６１１の凹部に設けられている。なお、第２基板６１１は、第２基板６１０に比べて、凹部の深さが浅い。 Further, instead of the second substrate 110, a second substrate 611 having a concave portion on the main surface is used. For example, the second substrate 611 is made of dug glass. The coating-type desiccant 631 is provided in the concave portion of the second substrate 611. The second substrate 611 has a shallower recess than the second substrate 610.
　また、図１３Ｃに示す有機ＥＬ素子６２では、塗布型乾燥剤６３１が有機発光部１２０に塗布されている。また、図１３Ｄに示す有機ＥＬ素子６３では、塗布型乾燥剤６３１が素子保護層６３２を介して有機発光部１２０に塗布されている。素子保護層６３２は、例えば、窒化膜などの絶縁性の保護膜である。 Further, in the organic EL element 62 shown in FIG. 13C, the coating type desiccant 631 is applied to the organic light emitting unit 120. In the organic EL element 63 shown in FIG. 13D, the coating desiccant 631 is applied to the organic light emitting unit 120 via the element protective layer 632. The element protective layer 632 is an insulating protective film such as a nitride film, for example.
　これにより、封止材１４０を介して浸入した水分は、シート乾燥剤６３０又は塗布型乾燥剤６３１に吸収されるので、有機層１２２が劣化するのを抑制することができる。 Thereby, the moisture that has entered through the sealing material 140 is absorbed by the sheet desiccant 630 or the coating-type desiccant 631, so that the organic layer 122 can be prevented from deteriorating.
　また、上記の実施の形態では、第１端子部１５１と第２端子部１５２とをそれぞれ、略矩形の対向する２つの辺に設けたが、第１端子部１５１及び第２端子部１５２の配置は、これに限らない。 In the above embodiment, the first terminal portion 151 and the second terminal portion 152 are provided on two opposing sides of a substantially rectangular shape, but the arrangement of the first terminal portion 151 and the second terminal portion 152 is provided. Is not limited to this.
　例えば、第１端子部１５１及び第２端子部１５２は、略矩形の一辺にのみ設けてもよい。あるいは、略矩形の一辺に第１端子部１５１を設け、他辺に第２端子部１５２を設けてもよい。例えば、図１において紙面左側に第１端子部１５１を設け、紙面右側に第２端子部１５２を設けた場合は、封止材１４０の左側に幅広部１４１が形成され、残りの部分に幅狭部１４２が形成される。また、第１端子部１５１及び第２端子部１５２を４辺全てに設けてもよい。 For example, the first terminal portion 151 and the second terminal portion 152 may be provided only on one side of a substantially rectangular shape. Alternatively, the first terminal portion 151 may be provided on one side of the substantially rectangular shape, and the second terminal portion 152 may be provided on the other side. For example, in FIG. 1, when the first terminal portion 151 is provided on the left side of the drawing and the second terminal portion 152 is provided on the right side of the drawing, the wide portion 141 is formed on the left side of the sealing material 140 and the remaining portion is narrow. Part 142 is formed. Further, the first terminal portion 151 and the second terminal portion 152 may be provided on all four sides.
　また、上記の実施の形態では、幅広部１４１の封止幅が幅狭部１４２の略２倍である例について示したが、これに限らない。例えば、封止材１４０を構成する樹脂材料を環状に描画して枠を形成した後、滴下量を変更して枠の一部に沿った線を形成してもよい。これにより、幅広部１４１の封止幅を、幅狭部１４２の封止幅より大きく、幅狭部１４２の封止幅の略２倍より小さくすることができる。また、枠の一部に沿った線を複数描画することで、幅広部１４１の封止幅を、幅狭部１４２の封止幅の略３倍以上にすることもできる。 In the above embodiment, the example in which the sealing width of the wide portion 141 is approximately twice that of the narrow portion 142 has been described, but the present invention is not limited thereto. For example, the resin material constituting the sealing material 140 may be drawn in a ring shape to form a frame, and then the dripping amount may be changed to form a line along a part of the frame. As a result, the sealing width of the wide portion 141 can be made larger than the sealing width of the narrow portion 142 and smaller than about twice the sealing width of the narrow portion 142. Further, by drawing a plurality of lines along a part of the frame, the sealing width of the wide portion 141 can be made approximately three times or more the sealing width of the narrow portion 142.
　また、上記の実施の形態では、幅広部２４１の中央部分に線状の空間２４３を形成したが、複数の空間２４３が形成されてもよい。具体的には、封止材１４０を構成する樹脂材料を環状に描画して枠を形成した後、所定距離だけ離間させて枠の一部に沿って線を描画し、さらに、所定距離だけ離間させて枠の一部に沿って線を描画することで、２つの洗浄の空間２４３を形成することができる。 In the above-described embodiment, the linear space 243 is formed in the central portion of the wide portion 241. However, a plurality of spaces 243 may be formed. Specifically, the resin material constituting the sealing material 140 is drawn in a ring shape to form a frame, and then a line is drawn along a part of the frame with a predetermined distance, and further, the frame is separated by a predetermined distance. Thus, two cleaning spaces 243 can be formed by drawing a line along a part of the frame.
　また、上記の実施の形態では、第１端子部１５１と第１電極層１２１とを一体形成したが、これに限らない。第１端子部１５１と第１電極層１２１とは、別部材から構成されてもよい。また、第２端子部１５２と第２電極層１２３とが一体に形成されてもよい。 In the above embodiment, the first terminal portion 151 and the first electrode layer 121 are integrally formed. However, the present invention is not limited to this. The 1st terminal part 151 and the 1st electrode layer 121 may be comprised from another member. Further, the second terminal portion 152 and the second electrode layer 123 may be integrally formed.
　また、例えば、上記の実施の形態では、第１電極層１２１が陽極で、第２電極層１２３が陰極である例について示したが、逆でもよい。すなわち、第１電極層１２１が陰極で、第２電極層１２３が陽極でもよい。 For example, in the above-described embodiment, an example in which the first electrode layer 121 is an anode and the second electrode layer 123 is a cathode is shown, but the reverse may be possible. That is, the first electrode layer 121 may be a cathode and the second electrode layer 123 may be an anode.
　また、例えば、上記の実施の形態では、有機ＥＬ素子１０の平面視形状が矩形である例について示したが、これに限らない。例えば、有機ＥＬ素子１０の平面視形状は、多角形、円形又は楕円形などの、直線若しくは曲線で描かれた閉じた形状でもよい。 In addition, for example, in the above-described embodiment, the example in which the planar view shape of the organic EL element 10 is rectangular has been described, but the present invention is not limited thereto. For example, the planar view shape of the organic EL element 10 may be a closed shape drawn by a straight line or a curve, such as a polygon, a circle, or an ellipse.
　その他、各実施の形態に対して当業者が思いつく各種変形を施して得られる形態や、本発明の趣旨を逸脱しない範囲で各実施の形態における構成要素及び機能を任意に組み合わせることで実現される形態も本発明に含まれる。 In addition, the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.
１０、２０、２１、３０、４０、６０、６１、６２、６３　有機ＥＬ素子
５０　照明装置
１００　第１基板
１１０、６１０、６１１　第２基板
１２０　有機発光部
１２１　第１電極層
１２２　有機層
１２３　第２電極層
１２４　絶縁層
１３０、２４４　充填材
１４０、２４０、３４０　封止材
１４１、２４１、３４１　幅広部
１４２　幅狭部
１５１　第１端子部
１５２　第２端子部
２４３　空間 10, 20, 21, 30, 40, 60, 61, 62, 63 Organic EL element 50 Illuminating device 100 First substrate 110, 610, 611 Second substrate 120 Organic light emitting unit 121 First electrode layer 122 Organic layer 123 Second Electrode layer 124 Insulating layer 130, 244 Filler 140, 240, 340 Sealant 141, 241, 341 Wide part 142 Narrow part 151 First terminal part 152 Second terminal part 243 Space

Claims (8)

  1. 　互いに対向配置された第１基板及び第２基板と、
    　前記第１基板と前記第２基板との間に設けられた有機発光部と、
    　前記有機発光部を囲むように配置され、前記第１基板と前記第２基板とを接着する封止材とを備え、
    　前記有機発光部は、
    　互いに対向配置された第１電極層及び第２電極層と、
    　前記第１電極層と前記第２電極層との間に設けられた、発光層を含む有機層とを含み、
    　前記封止材は、
    　幅狭部と、
    　前記幅狭部より封止幅が大きい第１幅広部とを有し、
    　前記第１幅広部は、前記有機層の端面のうち前記第２電極層によって覆われていない部分の近傍に設けられている
    　有機ＥＬ素子。     A first substrate and a second substrate disposed opposite to each other;
    An organic light emitting unit provided between the first substrate and the second substrate;
    A sealing material that is disposed so as to surround the organic light emitting unit, and that bonds the first substrate and the second substrate;
    The organic light emitting unit is
    A first electrode layer and a second electrode layer disposed opposite to each other;
    An organic layer including a light emitting layer provided between the first electrode layer and the second electrode layer;
    The sealing material is
    A narrow part,
    A first wide portion having a larger sealing width than the narrow portion,
    The first wide portion is provided in the vicinity of a portion of the end face of the organic layer that is not covered with the second electrode layer.
  2. 　前記有機層の端面のうち前記幅狭部の近傍部分は、前記第２電極層によって覆われている
    　請求項１に記載の有機ＥＬ素子。     The organic EL element according to claim 1, wherein a portion of the end face of the organic layer in the vicinity of the narrow portion is covered with the second electrode layer.
  3. 　前記有機ＥＬ素子は、さらに、
    　前記第１電極層に電気的に接続され、前記封止材の外側に配置された第１端子部と、
    　前記第２電極層に電気的に接続され、前記封止材の外側に配置された第２端子部とを備え、
    　前記第１幅広部は、前記第１端子部の近傍に設けられ、
    　前記幅狭部は、前記第２端子部の近傍に設けられる
    　請求項１又は２に記載の有機ＥＬ素子。     The organic EL element further includes:
    A first terminal portion electrically connected to the first electrode layer and disposed outside the sealing material;
    A second terminal portion electrically connected to the second electrode layer and disposed outside the sealing material;
    The first wide portion is provided in the vicinity of the first terminal portion,
    The organic EL element according to claim 1, wherein the narrow portion is provided in the vicinity of the second terminal portion.
  4. 　前記第１幅広部と前記第２端子部とは、離間している
    　請求項３に記載の有機ＥＬ素子。     The organic EL element according to claim 3, wherein the first wide portion and the second terminal portion are separated from each other.
  5. 　前記第１幅広部は、内部に空間を有する
    　請求項１～４のいずれか１項に記載の有機ＥＬ素子。     The organic EL element according to claim 1, wherein the first wide portion has a space inside.
  6. 　前記空間には、充填材が充填されている
    　請求項５に記載の有機ＥＬ素子。     The organic EL element according to claim 5, wherein the space is filled with a filler.
  7. 　前記有機発光部は、平面視において略矩形であり、
    　前記封止材は、平面視において略矩形の枠状体であり、さらに、前記枠状体の角部に設けられた、前記幅狭部より封止幅が大きい第２幅広部を有する
    　請求項１～６のいずれか１項に記載の有機ＥＬ素子。     The organic light emitting unit is substantially rectangular in plan view,
    The sealing material is a substantially rectangular frame-like body in a plan view, and further includes a second wide portion provided at a corner of the frame-like body and having a sealing width larger than the narrow portion. 7. The organic EL device according to any one of 1 to 6.
  8. 　請求項１～７のいずれか１項に記載の有機ＥＬ素子を備える照明装置。 An illumination device comprising the organic EL element according to any one of claims 1 to 7.
PCT/JP2015/002044 2014-05-12 2015-04-13 Organic el element and lighting apparatus WO2015174013A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014098436 2014-05-12
JP2014-098436 2014-05-12

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