WO2006028089A1 - 発光デバイスおよびその製造方法 - Google Patents
発光デバイスおよびその製造方法 Download PDFInfo
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- WO2006028089A1 WO2006028089A1 PCT/JP2005/016330 JP2005016330W WO2006028089A1 WO 2006028089 A1 WO2006028089 A1 WO 2006028089A1 JP 2005016330 W JP2005016330 W JP 2005016330W WO 2006028089 A1 WO2006028089 A1 WO 2006028089A1
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- light
- emitting device
- layer
- light emitting
- disposing
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- 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
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- 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
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
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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
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
Definitions
- the present invention relates to a white and multicolor light emitting device having high definition, excellent visibility, and a wide range of applicability, and a method for manufacturing the same.
- the light-emitting device can be used for display of personal computers, word processors, televisions, audio, video, car navigation, telephones, portable terminals, and industrial measuring instruments.
- Electroluminescent elements are thin-film, self-luminous devices that have excellent characteristics such as low drive voltage, high resolution, and high viewing angle. Therefore, various studies have been made for their practical application.
- a “three-color light emitting system” in which elements emitting light in red, green, and blue are arranged by applying an electric field is specified.
- “Color filter system” that converts red, green, and blue light through color filters that transmit light in the wavelength range, and absorbs near-ultraviolet light, blue light, blue-green light, or white light, and performs wavelength distribution conversion. Therefore, a “color conversion method” has been proposed in which a color conversion dye that emits light in the visible region is used as a filter.
- the color filter method can use a monochromatic electroluminescent element, and has fewer process steps than the color conversion method, and is said to be an advantageous method for manufacturing a large screen display. ing.
- the color filter method transmits only necessary wavelength components from white light emitted from an electroluminescent element using a color filter, and obtains desired colors such as red, green, and blue. It is a method. Therefore, the light emitted from the electroluminescent element needs to contain components in three wavelength ranges of red, green, and blue in a balanced manner.
- an electroluminescent element in which a blue light emitting layer and a green light emitting layer are sequentially laminated, and the green light emitting layer has a region containing a red pigment (see Patent Document 2).
- the green light emitting layer is produced by doping the green dye with the force produced by the aluminum chelate functioning as an electron transport layer or the chelate.
- the red light emitting region is a region where the aluminum chelate is doped with a red pigment.
- a blue light emitting layer and a green light emitting layer are laminated as the light emitting layer, and a red pigment is doped into any other layer of the electroluminescent element (see Patent Document 3).
- the green light-emitting layer is formed from an aluminum chelate.
- a red light-emitting dopant is mixed with the green light-emitting layer, light emission by the dopant is predominant.
- the amount of the dopant is reduced, a desired white color cannot be obtained. , And has disadvantages.
- the invention further includes: a light emitting layer including a host material that emits a primary color; a dopant that emits a complementary color; and a stilbene-based wavelength converting material that absorbs light emitted from the host and emits light having a longer wavelength.
- a light emitting layer including a host material that emits a primary color; a dopant that emits a complementary color; and a stilbene-based wavelength converting material that absorbs light emitted from the host and emits light having a longer wavelength.
- Patent Document 1 Japanese Patent Laid-Open No. 7-150139
- Patent Document 2 JP-A-7-142169
- Patent Document 3 JP-A-6-207170
- Patent Document 4 Japanese Unexamined Patent Publication No. 2000-243565
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-243563
- Patent Document 6 Japanese Patent Laid-Open No. 5-134112
- Patent Document 7 JP-A-7-218717
- Patent Document 8 Japanese Patent Laid-Open No. 7-306311
- Patent Document 9 JP-A-5-119306
- Patent Document 10 JP-A-7-104114
- Patent Document 11 Japanese Patent Laid-Open No. 6-300910
- Patent Document 12 JP-A-7-128519
- Patent Document 13 JP-A-8-279394
- Patent Document 14 JP-A-9 330793
- Patent Document 15 JP-A-8-27934
- Patent Document 16 Japanese Patent Laid-Open No. 5-36475
- Non-Patent Document 1 T. Ogura et al, 38th Joint Conference on Applied Physics, 31p-G-13 (19 91)
- Non-Patent Document 2 Appl. Phys. Lett., 64, 815 (1994)
- Non-Patent Document 3 The 55th Annual Conference of the Japan Society of Applied Physics, 19p-H-6 (1994)
- Non-Patent Document 4 Monthly Display, No. 3-7 (1997) Disclosure of the invention
- the object of the present invention is to obtain ideal white light emission including all three wavelength ranges of red, green and blue in a well-balanced manner, and when the luminance is changed or continuously driven.
- the light emitting device of the first embodiment of the present invention is a light emitting device including a complementary color layer, a transparent electrode, an organic light emitter and a reflective electrode on a transparent substrate, wherein the organic light emitter emits blue light.
- a layer and a red light emitting layer; the complementary color layer absorbs part of the light from the organic light emitter and emits green light; and emits white light from the transparent substrate side.
- it may be configured to further include at least three kinds of color filters arranged independently between the transparent substrate and the complementary color layer, and to emit multicolor light from the transparent substrate side.
- the complementary color layer may further have a function as a protective layer of the color filter.
- the transparent electrode is composed of a plurality of stripe-shaped portions extending in the first direction
- the reflective electrode is composed of a plurality of stripe-shaped portions extending in the first direction
- the first direction is the first direction.
- the transparent electrode is formed as a single unit, and the reflective electrode is connected to a plurality of switching elements in a one-to-one relationship to form a plurality of partial forces.
- the complementary color layer in this embodiment includes a matrix and at least one color conversion dye dispersed in the matrix.
- the light emitting device of the first embodiment includes a step of preparing a transparent substrate, a step of disposing a complementary color layer, a step of disposing a transparent electrode, a step of disposing an organic light emitter, And a step of disposing a reflective electrode in order.
- it may further include a step of independently disposing at least three types of color filters before disposing the complementary color layer.
- the method may further include a step of disposing a gas nolia layer before disposing the transparent electrode!
- the light emitting device includes at least a complementary color layer on a transparent substrate.
- the electrodes are bonded to face each other and emit white light from the transparent substrate side.
- it may be configured to further include at least three kinds of color filters arranged independently between the transparent substrate and the complementary color layer so as to emit multicolor light from the transparent substrate side.
- the complementary color layer may further have a function as a protective layer of the color filter.
- the transparent electrode is composed of a plurality of stripe-shaped portions extending in a first direction
- the reflective electrode is composed of a plurality of stripe-shaped portions extending in a first direction
- the first direction is the Whether the configuration intersects with the second direction, or alternatively, the transparent electrode is formed integrally
- the reflective electrode is configured with a plurality of partial forces connected to a plurality of switching elements in a one-to-one relationship. Either may be used for matrix driving.
- the complementary color layer in the present embodiment preferably includes a matrix and at least one color conversion pigment dispersed in the matrix.
- the light emitting device of the second embodiment includes a step of preparing a transparent substrate, a step of disposing a complementary color layer on the transparent substrate to form a filter laminate, and a step of preparing an element substrate.
- the filter laminate and the organic light-emitting device can be manufactured by a method comprising a step of bonding the complementary color layer and the transparent electrode so as to face each other.
- it may further include a step of independently disposing at least three kinds of color filters.
- a step of disposing a gas noria layer after disposing the complementary color layer may be further included.
- a simple process for producing a white light-emitting device that sufficiently includes components in each wavelength region with excellent luminance balance of each color and a multicolor light-emitting device using the device in combination with a color filter.
- For devices with poor brightness balance keep the brightness balance by emitting light more intensely in areas corresponding to colors with low brightness. For this reason, the lifespan of the portions corresponding to the respective colors is different, and the color shift becomes remarkable due to the long-term driving.
- FIG. 1 is a schematic cross-sectional view showing an example of the structure of a multicolor light emitting device according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing an example of the structure of a multicolor light emitting device according to a second embodiment of the present invention.
- FIG. 1 shows a schematic cross-sectional view of the multicolor light emitting device of the first embodiment of the present invention.
- the multicolor light emitting device of the present embodiment has a black matrix 2, a color filter (red: 3, green: 4, blue: 5), a complementary color layer 6, a gas barrier layer 7, a transparent electrode 8, and an organic material on a transparent substrate 1.
- a light emitter 9 and a reflective electrode 10 are laminated.
- Black matrix 2 and gas nolia layer 7 A force that is a layer that may be optionally provided is a layer that is preferably provided.
- each component will be described.
- the transparent substrate 1 in FIG. 1 is not particularly limited as long as it has excellent visible light transmittance and does not cause deterioration of the performance of the multicolor light emitting device in the process of forming the multicolor light emitting device.
- the transparent substrate 1 can be formed using a glass substrate, various plastic substrates, various films, or the like.
- the color filter (3, 4, 5) used in the multicolor light emitting device of the present invention is a layer for transmitting components in a desired wavelength range of light that has passed through the complementary color layer 6, and is one or a plurality of types. This layer may be provided.
- As the color filter it is possible to apply a flat panel display such as a liquid crystal display. In recent years, a pigment dispersion type color filter in which a pigment is dispersed in a photoresist has been widely used.
- the color filters 3, 4, and 5 are color filters having transmission bands in different wavelength ranges.
- color filter 3 is a red color filter that transmits light in the red region (wavelength range of 600 ⁇ m or more)
- color filter 4 is a green color filter that transmits light in the green region (wavelength region of 500 to 600 nm). Therefore, the color filter 6 can be a blue color filter that transmits light in the blue region (wavelength region of 400 to 550 nm).
- each color filter is provided in accordance with the position of a pixel or sub-pixel defined by the arrangement of electrodes described later.
- a black matrix 2 that does not transmit light in the visible region is disposed in a gap formed between pixels or sub-pixels of each color filter.
- Black matrix 2 is effective in improving the contrast ratio of a multicolor light emitting device.
- the black matrix 2 in the present invention can be formed using a material which is sold for flat panel display use, like the color filter.
- the complementary color layer 6 of the present invention protects the color filter and smoothes the film surface on the color filter. In addition to the purpose of conversion, it is a layer for obtaining white light that sufficiently contains components in the three wavelength regions of red, green, and blue by converting the wavelength distribution of part of the light emitted from the organic light emitter.
- the complementary color layer 6 includes a matrix and a color conversion pigment dispersed in the matrix.
- the matrix of the complementary color layer 6 is also rich in light transmittance and forms a material force that can be disposed by a process that does not degrade the color filter. Further, since a gas barrier layer and a light emitting portion including an electrode and an organic light emitter are formed on the upper surface of the complementary color layer 6, resistance to sputtering is further required.
- the complementary color layer 6 is generally formed by a coating method in order to have the purpose of smoothing the film surface.
- materials that can be used in this case include photocurable resin and photothermal combined type curable resin. After such a material is applied, it is generally used as a matrix that has been subjected to light and Z or heat treatment to generate radical species or ionic species to be polymerized or crosslinked to be insoluble and infusible.
- the photocurable resin used or the photothermal combination type curable resin is used in an organic solvent or an alkaline solution in an uncured stage. It is desirable that it be soluble.
- the cured product of photocurable resin or photothermal combination type resin that can be used as a matrix is: (1) Acrylic polyfunctional monomers and oligomers having a plurality of acryloyl groups or methacrylic groups And a film of a composition that also has light or thermal polymerization initiator power by light or heat treatment to generate photo radicals or heat radicals, and (2) a composition comprising polyvinyl cinnamate and a sensitizer A product obtained by dimerization of a product by light or heat treatment, and (3) a film of a composition composed of a chain or cyclic olefin and bisazide to generate nitrene by light or heat treatment to crosslink with olefin.
- a film of a composition comprising a monomer having an epoxy group and a photoacid generator is subjected to light or heat treatment to generate an acid (cation) to be polymerized.
- a composition comprising a monomer having an epoxy group and a photoacid generator is subjected to light or heat treatment to generate an acid (cation) to be polymerized.
- the mixture of the acrylic polyfunctional monomer and oligomer described in (1) and the initiator can be patterned with high definition, and from the viewpoint of reliability such as solvent resistance and heat resistance. Is also preferable.
- polycarbonate PC
- PET polyethylene tele Phthalate
- Polyethersulfone Polybulutyl
- Polyphenylene ether Polyamide
- Polyetherimide Norbornene resin
- Acrylic resin Methacrylic resin
- Isobutylene Maleic anhydride copolymer resin Cyclic olefin-based resin
- Thermosetting resin such as epoxy resin, phenol resin, urethane resin, bulle ester resin, imide resin, urethane resin, urea resin, melamine resin
- a polymer hybrid formed with a compound force containing trifunctional or tetrafunctional alkoxysilane may be used.
- the thickness of the complementary color layer 6 is also an important factor. If the complementary color layer 6 is too thick, the viewing angle characteristics will be adversely affected. For example, when the display is viewed obliquely, the light emitted from the adjacent pixels V and sub-pixels will pass through and appear to be lit even when not lit.
- the complementary color layer 6 of the present invention desirably has a thickness of 3 to 15 ⁇ m, preferably 5 to 1 O / z m on the upper surface of the color filter. By having a thickness within such a range, it is possible to achieve whitening of light from the organic light emitter and at the same time maintain good viewing angle characteristics.
- the color conversion dye contained in the complementary color layer 6 has a function of transmitting part of the light emitted from the organic light emitter, absorbing part of the light, and emitting light having a wavelength different from the absorbed wavelength.
- the organic illuminant power is a green conversion dye that absorbs the blue component and emits the green component when light with blue and red components is emitted. Is desirable.
- an inorganic or organic material that absorbs blue light (400 to 5 OOnm) and emits green fluorescence or phosphorescence can be used.
- Specific green conversion dyes include, for example, 3— (2 ′ monobenzothiazolyl) -7 diethylaminocoumarin (coumarin 6), 3— (2, —benzoimidazolyl) — 7— N, N Jetylaminocoumarin (coumarin 7), 3— (2, —N-methyl-benzoimidazolyl) —7—N, N—Jetylaminocoumarin (coumarin 30), 2, 3, 5, 6-1H, 4H—tetrahydro 8 Coumarin dyes such as trifluoromethylquinolizino (9, 9a, 1-gh) coumarin (coumarin 153), Alternatively, basic yellow 51, which is a coumarin dye, and naphthalimide dyes such as Solvent Yellow 11 and Solvent Yellow 116 can be used. In addition, various dyes (direct dyes, acid dyes, basic dyes, disperse dyes, etc.) can be used as long as they have absorptivity and fluorescence in an appropriate wavelength range
- a particularly preferred embodiment of the present invention is to convert a part of the luminescence of an organic luminescent material containing components in two wavelength ranges (blue and red) to green, and white that contains components in three wavelength ranges as a whole.
- the types and amounts of color conversion dyes that can be used in the complementary color layer 6 largely depend on the emission spectrum of the organic light emitter, the absorption Z fluorescence spectrum of each dye, the film thickness of the complementary color layer 6, and the like.
- the balance should be adjusted so that the sum of the light transmitted from the organic light emitter through the complementary color layer 6 and the light emission of the complementary color layer force becomes the target white spectrum. Is possible.
- the gas nolia layer 7 is a layer intended to prevent moisture and Z or oxygen derived from a layer formed thereunder from reaching the organic light emitter and deteriorating the organic light emitter.
- the gas barrier layer 7 has high transparency in the visible region (transmittance of 50% or more in the range of 400 to 700 nm), a glass transition temperature (Tg) of 100 ° C or more, and a film hardness of pencil hardness of 2H or more.
- Tg glass transition temperature
- a material force that does not deteriorate the function of the color filter and the Z or complementary color layer 6 is also formed.
- imide-modified silicone resin see Patent Documents 6 to 8
- inorganic metal compounds such as acrylic, polyimide, silicone resin, etc.
- Patent Documents 9 and 10 Atalylate monomer Z oligomer Z polymer Resin resin with one reactive bur group, Resist resin resin (refer to Patent Documents 11 to 14), formed by sol-gel method And photo-curable resin such as inorganic compounds (see Non-Patent Document 4 and Patent Document 15), fluorine-based resin (see Patent Documents 14 and 16), and Z or thermosetting resin.
- the formation method is not particularly limited. For example, it can be formed by a conventional method such as a dry method (sputtering method, vapor deposition method, CVD method, etc.) or a wet method (spin coating method, roll coating method, casting method, etc.).
- the gas nolia layer 7 is electrically insulative and resistant to gases and organic solvents. It has noria properties, has high transparency in the visible range (transmittance of 50% or more in the range of 400 to 800 nm), and preferably has a pencil hardness of 2H or more as the hardness to withstand the film forming conditions of the electrode formed thereon. It may be formed using a material having film hardness. As such materials, for example, materials such as inorganic oxides such as SiO 2, SiN 3, SiN 2 O 3, AIO 3, TiO 2, TaO 3 and ZnO, and inorganic nitrides can be used. Even when the gas noria layer 7 is formed using these inorganic materials, it can be formed by a conventional method such as sputtering, CVD, vacuum deposition, dipping, or sol-gel without any particular restrictions.
- the gas barrier layer 7 may be a single layer of the aforementioned material or may be a laminated structure of a plurality of layers formed of the aforementioned material.
- the gas barrier layer 7 When the gas barrier layer 7 is provided in the multicolor light emitting device of the present embodiment, it is necessary to consider the influence on the viewing angle characteristics as in the case of the complementary color layer 6. When the gas barrier layer 7 that is too thick is formed, the optical path length from when the light emitted from the organic light emitter passes through the gas barrier layer 7 and reaches the complementary color layer 6 or the color filter is increased. As a result, when the multicolor light emitting device is viewed from an oblique direction, light leakage (optical crosstalk) to adjacent sub-pixels or sub-pixels occurs.
- the ratio of the light emission amount of adjacent pixels or subpixels due to optical crosstalk to the light emission amount of the original pixels or subpixels is required to be sufficiently small. It is.
- the thickness of the gas nolia layer 7 is preferably 0.1 to 5 ⁇ m.
- the transparent electrode 8 is made of a conductive metal oxide such as SnO, InO, ITO, IZO, ZnO:
- the transparent electrode 8 preferably has a transmittance of 50% or more, more preferably 85% or more with respect to light having a wavelength of 400 to 800 nm.
- the transparent electrode 8 is usually 50 nm or more, preferably 50 ⁇ ! It is desirable to have a thickness in the range of ⁇ 1 ⁇ m, more preferably in the range of 100 to 300 nm.
- the reflective electrode 10 is preferably formed using a highly reflective metal, amorphous alloy, or microcrystalline alloy.
- High reflectivity metals include Al, Ag, Mo, W, Ni, Cr and the like.
- High reflectivity amorphous alloys include NiP, NiB, CrP and CrB.
- High reflectivity Microcrystalline alloys include NiAl.
- other alloys for example, MgZAg alloy
- the reflective electrode 10 can be formed by any method known in the art such as vapor deposition and notching.
- one of the transparent electrode 8 and the reflective electrode 10 can be used as an anode, and the other can be used as a cathode.
- the transparent electrode 8 can be used as an anode
- the reflective electrode 10 can be used as a cathode.
- Each of the transparent electrode 8 and the reflective electrode 10 may be formed from a plurality of stripe-shaped partial electrodes, and the noisy matrix drive may be performed. In this case, the extending direction of the stripe-shaped partial electrode of the transparent electrode 8 intersects with the extending direction of the stripe-shaped partial electrode of the reflective electrode 10 and is preferably orthogonal.
- a plurality of switching elements may be provided separately, and the reflective electrode 10 may be configured from a plurality of partial electrodes corresponding one-to-one to the plurality of switching elements to perform active matrix driving.
- the transparent electrode 8 is formed as an integral electrode.
- the organic light emitter 9 is sandwiched between the transparent electrode 8 and the reflective electrode 10 and includes at least an organic light emitting layer. If necessary, it has a structure in which a hole injection layer, a hole transport layer, an electron transport layer, and / or an electron injection layer are interposed. More specifically, for example, the following structures can be mentioned.
- the anode is preferably the transparent electrode 8 and the cathode is preferably the reflective electrode 10.
- phthalocyanines (Pc) including copper phthalocyanine (CuPc) and the like
- indanthrene compounds, and the like can be used.
- the hole transport layer should be formed using a material having a triarylamine partial structure, a force rubazole partial structure, or an oxadiazole partial structure (eg, TPD, a-NPD, PBD, m-MTDATA, etc.). Can do.
- a material having a triarylamine partial structure, a force rubazole partial structure, or an oxadiazole partial structure eg, TPD, a-NPD, PBD, m-MTDATA, etc.
- Materials for the electron injection layer include alkali metals such as Li, Na, K, and Cs, alkaline earth metals such as Ba and Sr, alloys containing them, rare earth metals, and fluorides of these metals. Forces that can be used It is not limited to them. In the configuration of the present invention, it is preferable to provide an electron injection layer from the viewpoint of improving the electron injection efficiency.
- the film thickness of the electron injection layer can be appropriately selected in consideration of the driving voltage, transparency, and the like, but in the normal case, it is preferably lOnm or less.
- an aluminum quinolinol complex doped with an alkali metal and an alkaline earth metal may be used.
- Materials for the electron transport layer include oxadiazole derivatives such as PBD and TPOB;
- Triazole derivatives such as TAZ; Triazine derivatives; Feruquinoxalines; Thiophene derivatives such as BMB-2T and BMB-3 ⁇ ; Aluminum complexes such as aluminum tris (8 quinolinolato) (A1 q) can be used .
- the organic light emitting layer of the present invention is composed of two layers, a blue light emitting layer and a red light emitting layer.
- the blue and red light emitting layers are composed of a hosted one-punt system in which a dopant is doped in a host material.
- the host material for the blue and red light emitting layers may be used as a common material, which is preferable from the viewpoint of simplifying the process.
- the host material that can be used is an aluminum chelate complex, 4, 4, monobis (2, 2 diphenyl) biphenyl (DPVBi), 2, 5 bis (5-tert butyl 2 benzo) Xazolyl) thiophene (BBOT) and the like.
- Blue light-emitting dopants that can be used in the blue light-emitting layer are perylene, 2, 5, 8, 11-tetra-tert-butylperylene (TBP), 4, 4, bis [2— ⁇ 4 (N, N diphenyl- Ruamino) Fuel ⁇ Bull] Bi-Fuel (DPAVB i) etc.
- the blue light emitting dopant is added in an amount of 0.1 to 5% by weight based on the total weight of the blue light emitting layer.
- the red light-emitting dopant used in the red light-emitting layer is 4 (dicyanomethylene) 2-methyl 6- (p dimethylaminostyryl) 4H pyran (DCM 1), 4 disianomethylene-2-methyl-6- —Hil—Bul) 4H —Pyran (DCM2), [2— (2 propyl) 1 6— [2— (2, 3, 6, 7—Tetrahydro 1, 2, 2, 7, 7—Tetramethyl 1 H, 5H benzo [ij] quinolidine 1-9-yl) 1]] 4H-pyran 4 ylidene] -propanedi-tolyl (DCJT1) and other 4-disyanmethylene pyran compounds, 4, 4 difluoro 1,3 , 5, 7-tetraphenyl 4 borah 3a, 4a diaza s In
- the amount of the red dopant is increased in order to increase the intensity of the red light component, the intensity of the blue light component is decreased. The reverse is also true.
- the amount of red dopant added should be within a range of 1 to 2 times the amount of blue dopant added. Is preferred.
- either the blue light emitting layer or the red light emitting layer may be on the anode side.
- a blue dopant is added to the host that is the material of the hole transport layer to add blue.
- a red light emitting layer may be formed by adding a red dopant into a host which is a material of an electron transport layer that may form a color light emitting layer.
- FIG. 2 shows a schematic cross-sectional view of the multicolor light emitting device of the second embodiment of the present invention.
- the multicolor light emitting device of the present embodiment includes a filter laminate having a structure of the gas nolia layer 7 or less of the device of the first embodiment, a reflective electrode 10, an organic light emitter 9, and a transparent electrode 8 on an element substrate 11.
- the organic light-emitting devices in which the layers are stacked in this order have a structure in which the reflective electrode 10 and the complementary color layer 6 (gas nolia layer 7 if present) are opposed to each other.
- the bonding can be performed using the adhesive Z outer peripheral sealing layer 12.
- the transparent substrate 1, the black matrix 2, and the filter laminate in the present embodiment As the color filter (red: 3, green: 4, blue: 5), the complementary color layer 6, and the gas barrier layer 7, those similar to those described in the first embodiment can be used. Also in this embodiment, the black matrix 2 and the gas noble layer 7 are layers that may be optionally provided, and are preferably provided.
- an insulating substrate having strength such as glass or plastic, or a substrate in which an insulating thin film is formed on a semiconductive substrate or a conductive substrate can be used.
- a flexible film formed from a resin such as polyolefin, acrylic resin, polyester resin, or polyimide resin may be used as the element substrate 11.
- a switching element such as a TFT may be provided on the element substrate 11.
- the organic light emitting device in the present embodiment is a laminate of the transparent electrode 8Z organic light emitter 9Z reflective electrode 10 of the first embodiment except that the stacking order is the reflective electrode 10Z organic light emitter 9Z transparent electrode 8. Has the same structure as the body. Each constituent layer can be the same as that described in the first embodiment.
- the organic light emitting device of this embodiment is particularly advantageous when performing force active matrix driving, which can be configured to perform passive matrix driving as in the first embodiment. This is because the light emitted from the organic light emitter 9 is not extracted to the element substrate 11 side, and thus the light is not blocked by the switching element provided on the element substrate 11.
- the laminate of the filter and the organic light emitting element can be bonded using the adhesive Z outer periphery sealing layer 12.
- the adhesive Z outer periphery sealing layer 12 can be formed using a material such as an ultraviolet curable adhesive.
- the adhesion Z outer periphery sealing layer 12 may include a spacer such as glass beads or silica beads having a diameter of 20 to 60 ⁇ m, preferably 35 to 55 ⁇ m. The spacer defines the bonding distance between the filter stack and the organic light emitting element, and bears the pressure applied for bonding.
- Bonding is performed by applying an adhesive Z outer sealing layer 12 material such as an ultraviolet curable adhesive to the periphery of the filter stack or the organic light emitting device, and the complementary color layer 6 or gas barrier layer 7 of the filter stack. (If present) and the transparent electrode 8 of the organic light-emitting device are arranged to face each other, and then the adhesive Z outer periphery sealing layer 12 material is cured. [0057] In a white light emitting element having a blue light emitting layer and a red light emitting layer according to the prior art, the light emission intensity in the green region is insufficient.
- an adhesive Z outer sealing layer 12 material such as an ultraviolet curable adhesive
- the light emitting devices of the first and second embodiments of the present invention perform color conversion in the complementary color layer 6 to compensate the intensity of the green region. Therefore, it is possible to maintain a good balance of red, green and blue components, and to suppress local deterioration of the illuminant accompanying driving.
- the complementary color layer 6 with a function as a protective layer of the color filter, a conventional color filter type device that does not increase the number of process steps can be modified and applied.
- the light emitting devices of the first and second embodiments can be formed.
- the complementary color layer 6 is a layer in which at least one color conversion dye is dispersed in the matrix, it can be formed using a known and simple wet process.
- a 0.5 ⁇ m-thick SiO film is deposited on the complementary color layer using a sputtering method
- a noria layer was formed.
- An RF-planar magnetron type device was used as the sputtering device, and SiO was used as the target.
- Ar is used as the sputtering gas, and the substrate temperature during formation is 8
- ITO was deposited on the entire surface of the gas barrier layer by sputtering.
- resist OFRP-800 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- ITO was deposited on the entire surface of the gas barrier layer by sputtering.
- resist OFRP-800 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- ITO was deposited on the entire surface of the gas barrier layer by sputtering.
- resist OFRP-800 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- a photolithography method to obtain a transparent electrode having a width of 4 mm, a length of 50 mm, and a film thickness of lOOnm.
- the substrate on which the transparent electrode is formed is mounted in a resistance heating vapor deposition apparatus, and the hole injection layer, the hole transport layer, the blue light emitting layer, the red light emitting layer, and the electron transport layer are sequentially formed without breaking the vacuum.
- a film was formed. During film formation, the internal pressure of the vacuum chamber was reduced to 1 ⁇ 10_4 Pa.
- As the hole injection layer copper phthalocyanine (CuPc) having a thickness of lOOnm was laminated.
- As the hole transport layer 4,4, -bis [N- (1-naphthyl) -N-phenylamino] biphenyl ( ⁇ -NPD) having a thickness of 20 ⁇ m was laminated.
- a blue light-emitting layer having a thickness of lOnm was laminated using DPVBi as the host material and DPAVBi as the dopant.
- the amount of DPAVBi added was 5% by mass based on the total weight of the blue light emitting layer.
- a red light emitting layer having a thickness of 30 nm was laminated using DPVBi as the host material and DCM1 as the dopant.
- the amount of DCM1 added was 3% by weight based on the total weight of the red light emitting layer.
- MgZAg mass ratio 10Z1
- a reflective electrode having a width of 4 mm, a length of 50 mm, and a film thickness of 200 nm.
- the obtained laminate is moved into a glove box in a dry nitrogen atmosphere (both oxygen concentration and moisture concentration is 10 ppm or less) and sealed with sealing glass and UV curable adhesive. A light emitting device was obtained.
- black matrix material (CK—7001: manufactured by Fuji Film ARCH)
- red color filter material (CR—7001: manufactured by Fuji Film ARCH)
- green color filter material (CG-7001: Fuji Film ARCH)
- blue color film A black matrix and power filter (red, green, and blue) were formed using a filter material (CB-7001: manufactured by Fuji Film ARCH).
- the thickness of the green color filter was 2 ⁇ m, and the thickness of the other layers was 1 ⁇ m.
- Each color filter was formed so that a set of red, green, and blue sub-pixels arranged in the horizontal direction was a pixel.
- the size of each sub-pixel is 300 m in length x 100 m in width, and the interval between adjacent sub-pixels is 30 m in the vertical direction and 10 m in the horizontal direction. Therefore, one pixel had dimensions of 300 m in length and 320 m in width, and the interval between adjacent pixels was 30 m in the vertical direction and 10 m in the horizontal direction.
- 50 pixels in the vertical direction and 50 pixels in the horizontal direction were arranged to form a total of 2500 pixels.
- a complementary color layer and a gas barrier layer were formed on the black matrix and the color filter according to the same method as in Example 1.
- a transparent electrode was formed on the gas barrier layer according to the same method as in Example 1 except that the shape was changed to a plurality of stripe shapes extending in the vertical direction having a width of 100 m and a distance of 10 m.
- a hole injection layer, a hole transport layer, a blue light emitting layer, a red light emitting layer, and an electron transport layer were formed in the same manner as in Example 1.
- a reflective electrode was formed according to the same method as in Example 1 except that the shape was changed to a plurality of stripe shapes extending in the lateral direction with a width of 300 / ⁇ and a distance of 30 m using a mask. Finally, sealing was performed in the same manner as in Example 1 to obtain a multicolor light emitting device.
- the host material of the red light emitting layer is Alq and the dopant is changed to DCM2.
- Example 2 was repeated to obtain a multicolor light emitting device.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/574,497 US20070290612A1 (en) | 2004-09-07 | 2005-09-06 | Light Emitting Device and Method for Producing Same |
JP2006535761A JPWO2006028089A1 (ja) | 2004-09-07 | 2005-09-06 | 発光デバイスおよびその製造方法 |
GB0703117A GB2432972B (en) | 2004-09-07 | 2005-09-06 | Light-emitting device and method for producing same |
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JP2004260211 | 2004-09-07 | ||
JP2004-260211 | 2004-09-07 |
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WO2006028089A1 true WO2006028089A1 (ja) | 2006-03-16 |
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PCT/JP2005/016330 WO2006028089A1 (ja) | 2004-09-07 | 2005-09-06 | 発光デバイスおよびその製造方法 |
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US (1) | US20070290612A1 (ja) |
JP (1) | JPWO2006028089A1 (ja) |
KR (1) | KR20070049638A (ja) |
CN (1) | CN101010990A (ja) |
GB (1) | GB2432972B (ja) |
TW (1) | TW200621083A (ja) |
WO (1) | WO2006028089A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007178978A (ja) * | 2005-12-28 | 2007-07-12 | Samsung Sdi Co Ltd | カラーフィルタ基板,およびカラーフィルタ基板を利用した有機発光表示装置 |
US8409727B2 (en) | 2005-12-28 | 2013-04-02 | Samsung Display Co., Ltd. | Color filter array and organic light-emitting display device using the same |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100670368B1 (ko) * | 2005-12-08 | 2007-01-16 | 삼성에스디아이 주식회사 | 실런트 및 이를 갖는 유기 발광 디스플레이 장치 |
KR100771607B1 (ko) * | 2005-12-21 | 2007-10-31 | 엘지전자 주식회사 | 유기 el 디스플레이 |
JP2008210788A (ja) * | 2007-02-02 | 2008-09-11 | Toppan Printing Co Ltd | 有機el素子 |
US20100194672A1 (en) * | 2007-09-21 | 2010-08-05 | Image & Materials, Inc. | Color filter, method of fabricating the same and display device |
TWI477824B (zh) * | 2011-12-27 | 2015-03-21 | Asahi Kasei E Materials Corp | Optical substrate and light emitting device |
CN104583363B (zh) * | 2012-08-23 | 2018-09-21 | 飞利浦灯具控股公司 | 稳定化波长转换元件 |
CN102867920A (zh) * | 2012-08-28 | 2013-01-09 | 李崇 | 白色oled发光体 |
CN102856350B (zh) * | 2012-08-28 | 2016-01-06 | 江苏三月光电科技有限公司 | 全色oled显示器 |
JP2014170091A (ja) * | 2013-03-04 | 2014-09-18 | Sony Corp | 表示装置、表示駆動方法、表示装置の製造方法、および電子機器 |
JP2015170620A (ja) * | 2014-03-04 | 2015-09-28 | 株式会社東芝 | 固体撮像装置 |
KR102193201B1 (ko) * | 2018-04-25 | 2020-12-21 | 문대식 | 디스플레이 장치 |
CN109088010B (zh) * | 2018-08-24 | 2020-08-28 | 云南大学 | 一种银镁合金电极和一种有机发光二极管 |
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JPH10255983A (ja) * | 1997-03-13 | 1998-09-25 | Idemitsu Kosan Co Ltd | 表示素子 |
JP2004103534A (ja) * | 2002-07-03 | 2004-04-02 | Fuji Electric Holdings Co Ltd | 有機elディスプレイおよびその製造方法 |
JP2004220907A (ja) * | 2003-01-15 | 2004-08-05 | Dainippon Printing Co Ltd | 有機elディスプレイおよびディスプレイ用透明電極基板 |
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US7233104B2 (en) * | 2002-03-15 | 2007-06-19 | Idemitsu Kosan Co., Ltd. | Color emission device |
US7063900B2 (en) * | 2002-12-23 | 2006-06-20 | General Electric Company | White light-emitting organic electroluminescent devices |
CN1817064B (zh) * | 2003-07-02 | 2010-12-01 | 松下电器产业株式会社 | 发光元件以及显示装置 |
-
2005
- 2005-07-13 TW TW094123774A patent/TW200621083A/zh unknown
- 2005-09-06 GB GB0703117A patent/GB2432972B/en not_active Expired - Fee Related
- 2005-09-06 CN CNA200580029505XA patent/CN101010990A/zh active Pending
- 2005-09-06 WO PCT/JP2005/016330 patent/WO2006028089A1/ja active Application Filing
- 2005-09-06 US US11/574,497 patent/US20070290612A1/en not_active Abandoned
- 2005-09-06 KR KR1020077003295A patent/KR20070049638A/ko not_active Application Discontinuation
- 2005-09-06 JP JP2006535761A patent/JPWO2006028089A1/ja not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10255983A (ja) * | 1997-03-13 | 1998-09-25 | Idemitsu Kosan Co Ltd | 表示素子 |
JP2004103534A (ja) * | 2002-07-03 | 2004-04-02 | Fuji Electric Holdings Co Ltd | 有機elディスプレイおよびその製造方法 |
JP2004220907A (ja) * | 2003-01-15 | 2004-08-05 | Dainippon Printing Co Ltd | 有機elディスプレイおよびディスプレイ用透明電極基板 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007178978A (ja) * | 2005-12-28 | 2007-07-12 | Samsung Sdi Co Ltd | カラーフィルタ基板,およびカラーフィルタ基板を利用した有機発光表示装置 |
JP2011014551A (ja) * | 2005-12-28 | 2011-01-20 | Samsung Mobile Display Co Ltd | カラーフィルタ基板,およびカラーフィルタ基板を利用した有機発光表示装置 |
JP2012119331A (ja) * | 2005-12-28 | 2012-06-21 | Samsung Mobile Display Co Ltd | カラーフィルタ基板,およびカラーフィルタ基板を利用した有機発光表示装置 |
US8409727B2 (en) | 2005-12-28 | 2013-04-02 | Samsung Display Co., Ltd. | Color filter array and organic light-emitting display device using the same |
Also Published As
Publication number | Publication date |
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US20070290612A1 (en) | 2007-12-20 |
GB0703117D0 (en) | 2007-03-28 |
GB2432972A (en) | 2007-06-06 |
CN101010990A (zh) | 2007-08-01 |
GB2432972B (en) | 2008-01-09 |
JPWO2006028089A1 (ja) | 2008-05-08 |
TW200621083A (en) | 2006-06-16 |
KR20070049638A (ko) | 2007-05-11 |
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