WO2005101915A1 - 電極基板及びその製造方法 - Google Patents
電極基板及びその製造方法 Download PDFInfo
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- WO2005101915A1 WO2005101915A1 PCT/JP2004/004971 JP2004004971W WO2005101915A1 WO 2005101915 A1 WO2005101915 A1 WO 2005101915A1 JP 2004004971 W JP2004004971 W JP 2004004971W WO 2005101915 A1 WO2005101915 A1 WO 2005101915A1
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- 235000020234 walnut Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
-
- 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]
- H10K50/17—Carrier injection layers
-
- 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
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
-
- 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
- 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
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
-
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- Electrode substrate and method of manufacturing the same
- the present invention relates to a structure of a substrate of an organic EL device and a method of manufacturing the same.
- the present invention relates to an electrode substrate used for an organic EL device using the CCM method.
- the present invention relates to a color conversion (CCM) substrate in which measures are taken against deterioration of the surface of the transparent electrode, which is the anode of the substrate.
- CCM color conversion
- organic EL Electrode
- it is being used as a color and full-color display device for information display devices and in-vehicle display devices.
- an organic EL element has a configuration in which a transparent electrode is used as an anode, an opposite electrode is used as a cathode such as A1 (aluminum), and an organic material layer is sandwiched between the two electrodes.
- a transparent electrode is used as an anode
- an opposite electrode is used as a cathode such as A1 (aluminum)
- an organic material layer is sandwiched between the two electrodes.
- the present invention particularly relates to an organic EL device to which a CCM (Color Changing Medium) method is applied.
- the CCM method is one of the methods for colorizing a display device.
- a color display device is configured using organic EL elements, for example, an organic substance that emits light of three primary colors (red, blue, and green) may be used.
- organic substances three types of organic substances (hereinafter simply referred to as organic substances) complicates the manufacturing process, so it is desirable to be able to colorize using only one type of organic substance.
- the CCM method was devised based on such a request, and the monochromatic light (for example, blue) emitted by one kind of organic matter was converted to light of another wavelength (for example, red or green) using a fluorescence conversion layer as appropriate. This is a method to create three primary colors by converting to.
- This CCM method is one of the most promising techniques for colorizing display devices, from the viewpoint of manufacturing cost and high definition (full color) of patterns.
- the CCM method there may be a case in which not only a simple fluorescence conversion layer but also a color filter is used to improve the purity of the emission color. That is, it is known that the emission color of the organic EL is changed by using a fluorescence conversion layer and one layer of Z or a color filter.
- FIG. 4 is a schematic sectional view showing a basic structure of the organic EL display device 10 using the CCM method.
- a CCM layer 14 is provided on a transparent glass substrate 12.
- the CCM layer 14 transmits the blue light emitted by the green CCM layer 14 G that emits green fluorescence, the red CCM layer 14 R that emits red fluorescence, and the blue light emitted by the organic layer 18 as it is.
- An anode 16 as a transparent electrode is laminated on the CCM layer 14.
- ITO Indium Tin Oxide
- IZO Indiumu Zinc Oxide
- An organic material layer 18 and a cathode 20 are provided in this order on the anode 16.
- the organic material layer 18 emits light when an electric field is applied, and is therefore sometimes called a light emitting layer.
- the organic EL display device 10 of the CCM type uses an organic material layer 18 that emits blue light. Then, the wavelength of the blue light is converted to green light by the green CCM layer 14G, and the wavelength is converted to red light by the red CCM layer 14R. On the other hand, the blue CCM layer 14B transmits the blue light emitted from the organic layer 18 as it is. With such a configuration, three primary colors of red, blue, and green light can be obtained.
- the CCM layer 14 actually includes a color filter to improve the color purity.
- the organic material layer 18 includes an electron injection layer and a hole injection layer. In practice, a mechanism for efficiently supplying electrons from the cathode 20 and holes from the anode 16 to the light emitting layer (organic layer 18) is also widely used.
- the structure from the anode 16 to the cathode 20 is particularly called "organic element 22". That is, the anode 16, the organic material layer 18, and the cathode 20.
- the structure from the substrate 12 to the anode 16 is referred to as an “electrode substrate” in the sense of a substrate with electrodes.
- the organic EL display device 10 can be easily manufactured by stacking the cathode and the organic substance constituting the EL element on the electrode substrate.
- the CCM layer 14 is provided between the substrate 12 and the anode 16
- the organic EL display device 10 of the CCM type can be easily formed. Is specifically referred to as a CCM board 24. That is, the electrode substrate including the substrate 12, the CCM layer 14, and the anode 16 is called a CCM substrate 24.
- the organic EL device is formed on a substrate.
- the above-described fluorescent conversion layer and one layer of Z or color filter are provided on the substrate.
- an anode is further provided on the fluorescence conversion layer and the like, and an organic material layer and a cathode are sequentially laminated in this order to form an organic EL element on the substrate.
- the substrate, the fluorescent conversion layer and / or one color filter layer laminated thereon, and the anode are also referred to as the CCM substrate 24.
- the anode 16 constituting the CCM substrate 24 a transparent electrode such as IZO (Indium Zinc Oxide) is used.
- IZO Indium Zinc Oxide
- the substrate fabrication involves a large number of steps, the substrate is easily contaminated, and a surface defect layer is easily formed on the anode surface.
- the surface of a transparent electrode such as IZO is easily damaged by an excessive cleaning step or an etching residue for patterning.
- adsorption of water on the electrode surface and precipitation of trace impurity atoms contained in the bulk of the electrode (an internal part other than the surface portion) on the surface are other causes, and a so-called poor surface layer is formed on the anode. Tend to be.
- the CCM layer fluorescence conversion layer itself is often made of resin.
- volatile gas components such as moisture from the resin may gradually contaminate the anode surface.
- the uniformity of light emission of the organic EL device decreases. Specifically, when a CCM panel (a display panel using an organic EL element using the CCM method) is formed, a reduction phenomenon of each pixel is observed.
- An organic EL display has been disclosed.
- the substrate and the CCM layer (including one color filter layer) on it are covered with an organic layer for flattening, and the organic EL element is laminated on the flattened layer.
- the organic EL element is laminated on the flattened layer.
- thermosetting resin or an ultraviolet curable resin is shown in Reference 1.
- the organic layer component for flattening is formed by stacking a barrier layer (passivation film) made of SiOx between the organic layer for flattening and the organic EL element. It has been shown that the diffusion into the material of each layer of the device is prevented, thereby preventing the device from being deteriorated.
- a barrier layer passivation film
- this barrier layer (passivation film) is effective in preventing the diffusion of volatile components from the organic layer and the CCM layer, but has little effect on the entry of moisture and the like from portions other than the CCM layer. Conceivable.
- the present invention is an invention for realizing a method (surface protective layer) for suppressing the occurrence of such a surface defective layer.
- the purpose of the buffer layer laminated on the anode is to improve the adhesion, to improve the conductivity by inorganic materials, to use an insulating thin film layer, and to reverse the anode surface by reverse sputtering. ), Etc. This will be described sequentially below.
- Reference 2 Japanese Patent Application Laid-Open No. H10-2104683 (hereinafter referred to as Reference 2), since the crystalline state of polycrystalline ITO (Indium Tin Oxide) is different from that of an organic material, the anode and the organic material layer cannot be joined well. It has been shown that there may be a problem such as a partial junction failure, a dark spot may be generated, or heat generated in the defective junction may cause deterioration of the organic layer.
- ITO Indium Tin Oxide
- conductive bonding improvement layers metal such as Au and Pt, Mo ⁇ x, VOx, Snox, Inox, Bax Amorphous films such as metal oxides and conjugated polymers
- Reference 3 discloses a technique of interposing a layer made of a material in which the terminal of a compound conventionally used as a hole injection / transport material is substituted with a silane coupling group.
- Reference 4 Japanese Patent Application Laid-Open No. Hei 9-1204985 discloses a technique for treating the ITO electrode itself with a titanate-based coupling agent from the same viewpoint as Reference 3.
- JP-A-3-105898 (hereinafter referred to as Reference 5) usually discloses a hole transport layer or an electron made of an organic substance.
- a technique has been disclosed in which a transport layer is formed of a P-type or N-type amorphous semiconductor having a good film formation state to improve the light emission performance.
- Reference 6 In Japanese Patent Application Laid-Open No. H10-260062 (hereinafter referred to as Reference 6), a mixed layer of ITO and an inorganic semiconductor is formed instead of an expensive hole injection / transport material, and the resistivity is reduced.
- a configuration in which the resistance is set to 20 ⁇ ⁇ cm or less is disclosed. This configuration is low in cost and avoids direct connection between the organic material and the ITO, so that good results can be obtained from the viewpoint of improving the adhesion described above, and the occurrence of dark spots is suppressed.
- the formed element can be formed.
- the anode I By forming a metal oxide (RuO, MoO, VO, etc.) with a work function value larger than IT 5 of 5 to 30 nm in the TO and the hole transport layer, the anode and the hole transport layer It is trying to reduce the energy barrier between them and improve the luminous efficiency.
- a metal oxide RuO, MoO, VO, etc.
- Reference 8 Japanese Patent Application Laid-Open No. 08-031573 discloses a configuration in which a part of the anode or the entire anode is formed of a carbon thin film.
- P-type semiconductors are used as a hole transporting material in JP-A-03-210791, JP-A-03-262170, and JP-A-06-119773. Is disclosed.
- U.S. Pat. No. 5,885,905 (hereinafter referred to as Reference 9) proposes a new device configuration using a tunnel injection mechanism that improves the adhesion between a transparent electrode and an organic material or actively forms a charge barrier. Is described. .
- a nitride such as aluminum nitride is coated with a thin film of about 5 OA to form an anode and an organic material layer. A configuration provided between them is disclosed.
- Reference 11 Japanese Patent Application Laid-Open No. 11-126689 (hereinafter referred to as Reference 11), it has been determined that the cause of the leakage current or dark spot is unevenness on the anode surface, and in order to eliminate the unevenness, the anode by reverse sputtering is used. Surface treatments have been proposed. Disclosure of the invention
- the present invention has been made in view of these problems, and the objects are as follows.
- the purpose of the present invention is to remove a defective surface layer present on the anode surface of a CCM substrate and to protect the anode surface.
- the objective is to stabilize the performance of the organic EL element and thus the CCM panel, specifically to prevent a rise in drive voltage, maintain uniform light emission, and improve heat resistance.
- the present invention proposes a new configuration different from the conventional one in which an inorganic compound is laminated after removing a defective surface layer, and a new surface is formed by laminating the inorganic compound. This has the effect of preventing the occurrence of a defective layer, which is not possible with the conventional technology.
- the presence of the surface protective layer of the present invention can prevent formation of a defective surface layer on the anode.
- a barrier layer for cathode separation formed on the anode of a CCM substrate for a full-color panel it can be stored and moved without any special consideration for contamination etc.
- the present invention specifically adopts the following configuration.
- the present invention provides a substrate, an electrode made of an In atom-containing compound, and a layer located between the electrode and the substrate, wherein a wavelength of light incident on the layer is reduced.
- the present invention is characterized in that a constituent material of the substrate and / or the electrode of the above electrode substrate is a transparent material. By using such a transparent material, an electrode substrate that can be used for display means can be obtained.
- the present invention is characterized in that a reverse sputtering process is performed on the electrode surface of the electrode substrate. With such a configuration, a defective surface layer on the electrode surface can be effectively reduced, and the electrode surface and the inside can be made uniform.
- the present invention is characterized in that the reverse sputtering is reverse sputtering by inductively coupled RF plasma-assisted magnetron sputtering. According to such a configuration, it is easy to obtain a discharge gas ion having a kinetic energy that is almost equal to the removal of the defective surface layer on the anode surface, so that the defective surface layer can be removed without damaging the electrode. .
- the present invention provides the method, wherein the inorganic compound constituting the surface protective layer comprises Ba, Ca, Sr, Yb, A1, Ga, In, Li, Na, K, Cd, Mg, S i, Ta, Ge, Sb, Zn, Cs, Eu, Y, Ce, W, Zr, La, Sc, Rb, Lu, Ti, Cr, Ho, At least one metal selected from the group consisting of Cu, Er, Sm, W, Co, Se, Hi, Tm, Fe, and Nb, or a nitride, a composite oxide, a sulfide, It is characterized by being one of fluorides. According to such a configuration, a dense surface protective layer can be formed on the electrode surface.
- the surface protection layer is formed by a sputtering method. With such a configuration, while removing the surface defect layer of the electrode, A defective surface layer can be formed.
- the present invention is characterized in that the surface protective layer is formed by a sputtering method using inductively coupled RF plasma-assisted magnetron sputtering. With such a configuration, the surface protective layer can be effectively formed.
- the present invention is characterized in that the thickness of the surface protective layer is a value within a range of 5 to 10 OA. According to such a configuration, it is possible to prevent re-generation of the defective surface layer, and to ensure a predetermined light transmittance.
- the present invention is characterized in that the electrode is made of indium tin oxide (ITO) or indium zinc oxide (IZ). According to such a configuration, excellent light transmittance can be obtained.
- ITO indium tin oxide
- IZ indium zinc oxide
- the present invention is characterized in that the electrode is an amorphous oxide.
- ITO is usually crystalline, but it can be made amorphous by a method such as a moisture atmosphere during film formation or doping with a trace element.
- the present invention includes a driving element for driving the electrode.
- a driving element for driving the electrode.
- liquid crystal display devices and organic EL display devices in which a thin film transistor (TFT) is provided for each pixel to improve the display performance have been widely used. Therefore, by providing an electrode substrate provided with a driving element such as a TFT in advance, it becomes easy to manufacture a liquid crystal display device and an organic EL display device of the TFT type as described above.
- the present invention relates to a method for manufacturing an electrode substrate.
- the present invention provides a substrate, an electrode made of an In atom-containing compound, and a layer located between the electrode and the substrate.
- a method for manufacturing an electrode substrate including: a fluorescent conversion layer for converting the wavelength of light to be emitted; and a step of forming the fluorescent conversion layer on the substrate; Forming the electrode on the surface of the electrode, and performing a reverse sputtering process on the surface of the formed electrode, wherein the reverse sputtering process is performed on the electrode surface.
- An electrode substrate manufacturing method characterized by forming a surface protection layer made of an inorganic compound when performing a sputtering process. With such a configuration, it is possible to manufacture an electrode substrate in which a defective surface layer on the electrode is reduced.
- the state in which the defective surface layer has been removed can be maintained, and the formation of the defective surface layer can be effectively prevented.
- the present invention is characterized in that the reverse sputtering is performed using inductively coupled RF plasma-assisted magnetron sputtering. According to such a configuration, discharge gas ions having a kinetic energy just suitable for removing the defective surface layer on the anode surface can be easily obtained, so that the defective surface layer can be removed without damaging the electrode.
- a high frequency power of 50 to 200 W and a frequency of 13.56 to 10 O MHz is applied to the helical coil of the inductively coupled RF plasma assisted magnetron sputtering
- a high-frequency power of 200 to 500 W and a frequency of 13.5 to 10 O MHz is applied to the cathode of the inductively coupled RF plasma assisted magnetron sputter to cause plasma discharge, and the inductive coupling is performed.
- the method of claim 1, wherein the intensity of the magnetron magnetic field of the RF plasma assisted magnetron sputtering is set to a value within a range of 200 to 300 Gauss.
- a defective surface layer on the electrode surface can be more effectively removed.
- the present invention relating to the electrode substrate is defined as follows from the measured values by XPs.
- the present invention provides a substrate, an electrode made of an In atom-containing compound, and a layer located between the electrode and the substrate, wherein a wavelength of light incident on the layer is reduced.
- An electrode substrate having a protective layer formed thereon, wherein the measurement results of X-ray photoelectron spectroscopy on the electrode surface are as follows.
- the present invention is by X-ray photoelectron spectroscopy, represents the half width of the peak of 3 d 5 Z 2 orbital spectrum of I n atoms measured in the electrode surface in the [I n 3 d 5/2 ] h, X-ray photoelectron spectroscopy measures 3
- the half-width of the peak of the d5 / 2 orbital spectrum is represented by [In3d5 / 2 ] n
- measured on the surface means that it is measured on at least a part of the surface or one point on the surface.
- the present invention provides a substrate, an electrode made of an In atom-containing compound, and a layer located between the electrode and the substrate, wherein the layer has a fluorescence for converting a wavelength of light incident on the layer. And a conversion layer, wherein a surface protection layer made of an inorganic compound is formed on a surface of the electrode, on a surface opposite to a surface facing the fluorescence conversion layer.
- An electrode substrate characterized in that the results measured by X-ray photoelectron spectroscopy are the following measured values. '
- the present invention is by X-ray photoelectron spectroscopy, the value of the peak of 3 d 5/2 orbital scan Bae spectrum of I n atoms measured in the electrode expressed in I .n peaJk, by X-ray photoelectron spectroscopy , the value of the peak of 3 d 5/2 orbital spectrum of S n atoms measured in the electrode represented by S n peak, the ratio of each peak measured at the electrode surface (I n peak / S n peak) h , and when the ratio of each peak measured inside the electrode is represented by (I n peak / S n peak) n , ((S n peak / I n peak) h ⁇ / (Sn peak / I n peak) n ) An electrode substrate characterized by 1.5.
- the ratio between the peak value of the In atom and the peak value of the Sn atom is measured inside and outside the electrode, and the ratio between the inside and outside is limited to a value within a predetermined range. By doing so, it is possible to form an electrode substrate having no defective surface layer on the electrode.
- the electrode substrate of the present invention since the electrode having the reduced surface defect layer is used, the electrical stability is improved. Therefore, if this electrode substrate is used, for example, as the anode of an organic EL device, the effect of extending the life of the device can be obtained. Further, there is an effect that a rise in drive voltage of the organic EL element can be suppressed. Further, the heat resistance of the organic EL device can be improved.
- a driving element for driving an electrode on the electrode substrate is provided, it is possible to provide an electrode substrate suitable for manufacturing a display device of, for example, a TFT type.
- an organic EL display device is configured by using the electrode substrate of the present invention as an electrode of an organic EL device, it is possible to obtain an organic EL display device in which uneven light emission and variation in luminance are reduced and image quality is improved. . Further, it is possible to improve the reliability over time of the image quality of the organic EL display device.
- FIG. 1 is a schematic cross-sectional view illustrating a configuration of a preferred organic EL display device of the present invention.
- FIG. 2 is a schematic diagram of a graph showing a spectrum when an In-containing compound was inspected by XPS.
- FIG. 3 is a schematic cross-sectional view illustrating a configuration of an organic EL display device according to a second embodiment.
- FIG. 4 is a schematic cross-sectional view of a conventional CCM type organic EL display device.
- FIG. 1 is a schematic diagram showing a cross section showing the configuration of such an organic EL display device 100.
- a feature of the present embodiment is that a surface protective layer 1 ⁇ 2 made of an inorganic compound or an organic compound is provided on the anode 156. . Then, the organic material layer 18 is laminated on the surface protective layer 102.
- the organic layer 18 is a portion that controls light emission, and is therefore also called a light-emitting layer.
- an organic substance is a compound in many cases, it is sometimes referred to as an organic compound layer.
- the organic layer 18 has at least a recombination region and a light-emitting region.
- the organic material layer 18 may be referred to as an organic EL element layer.
- a layer such as a hole injection layer, an electron injection layer, an organic semiconductor layer, an electron barrier layer, and an adhesion improving layer may be provided in addition to the organic material layer 18 (light emitting layer). Is also good.
- a plurality of layers including the hole injection layer and the like are generally called an organic material layer 1518. Then, the cathode 20 is formed on the organic material layer 18 composed of the plurality of layers.
- the organic EL display device 100 In the present embodiment, an example of the organic EL display device 100 is shown, but this organic EL display device corresponds to an example of the “light emitting device” in the claims. Since the organic EL itself is a light emitting element, it constitutes a light emitting device having a function of emitting light. In Embodiment 0, the organic EL display device 100 will be described as an example of the light emitting device. However, the “light emitting device” of the present invention is not limited to the organic EL display device.
- a typical configuration example (variation) of the organic EL display device 100 shown in the present embodiment is shown. Of course, it is not limited to this.
- the basic layer structure of the organic EL display device 100 is as follows.
- the organic EL element 122 has the following variations.
- Transparent electrode anode
- surface protective layer / light-emitting layer / electrode (cathode)
- the feature of this embodiment is the surface protection layer 102 included in the organic EL device 122.
- the surface of a transparent electrode such as ITO is damaged by excessive cleaning in a cleaning process or etching residue for pattern jung.
- the following so-called poor surface layers are formed due to the adsorption of water on the surface, the precipitation of trace impurity atoms contained in the walnut, and the like.
- the organic material is layered on the anode with a defective surface layer, and the device performance that could be originally obtained cannot be secured due to a decrease in the charge injection property at the interface. It is thought that there are many cases.
- the defective surface layer according to the present embodiment includes, for example, one that meets one of the following requirements.
- Sn which is a dopant, must be deposited on the surface.
- IZO the deficiency of Zn is mentioned.
- Oxidation vacancies which are also dopants, should be missing on the surface (ie, having too many oxygen atoms).
- ⁇ Trace impurities (nitrogen, etc.) contained in balta are deposited on the surface. Due to the presence of such a surface defect layer, the conductivity (hole injecting property) decreases, and It has the function of emitting longer wavelength fluorescence. For example, it converts blue light into green light or red light. Note that, in addition to the CCM layer 14, a color filter may be included to improve color reproducibility.
- Each CCM layer 14 is preferably arranged corresponding to the light emitting region of the organic EL element 122, for example, the position of the intersection of the anode 16 and the cathode 20.
- the anode 16 and the cathode 20 are arranged in a stripe shape with respect to the display surface, and both are provided on the display plane so as to be orthogonal to each other. Then, the organic material layer 18 at the position where the anode 16 and the cathode 20 overlap on the plane (intersecting position) emits light. This superimposed position (intersecting position) corresponds to “one pixel” on the display plane.
- the organic layer 18 (organic EL light emitting layer) emits light at the intersection of the anode 16 and the cathode 20, the light is received by each CCM layer 14 Thus, it becomes possible to extract light of different colors (wavelengths) to the outside.
- the organic EL element 122 emits blue light and can be converted into green and red light by the CCM layer 14, the organic EL element 122 composed of one kind of organic material layer 18 can be used. Even so, it is preferable because three primary colors of blue, green, and red light can be obtained, and a full-color display is possible.
- the material of the CCM layer 14 is not particularly limited.
- it is composed of a fluorescent dye or a fluorescent dye and a binder resin.
- a typical example of the CCM layer 14 composed of a fluorescent dye and a binder resin may be a solid state in which the fluorescent dye is dissolved or dispersed in a pigment resin and a binder resin.
- Describing a specific fluorescent dye as a fluorescent dye that converts violet light from near-ultraviolet light into blue light emission in the organic EL device 122, 1,4-bis (2-methylstyryl) benzene (Bis— Examples include stilbene dyes such as MBS) and trans-1,4'-diphenylstilbene (DPS), and coumarin dyes such as 7-hydroxy-4-methylcoumarin (coumarin 4).
- the fluorescent dye for converting blue, blue-green or white light emission into green light emission in the organic EL element 122 is, for example, 2, 3, 5, 6-1H, 4H-
- Tetrahydrol 8 Trifluoromethylquinolizino (9,9a, 1—gh) Tamarin (coumarin 153), 3— (2'-benzothiazolyl) 17-Jetylamino coumarin (coumarin 6), 3- (2'-benzimidazolyl) 1-7—N, N-Diethylaminocoumarin (coumarin 7) and other coumarin dyes, other basic coumarin dyes such as basic yellow 51, sonoleven toy yellow 11, sonoleven toy And naphthalimid dyes such as Yellow 116.
- a fluorescent dye for converting light emission from blue to green or white light emission from the organic EL element 122 to light emission from orange to red for example, 4-dicyanomethylene-12-methyl- 6- (p-dimethylaminostillyl) -14H pyran (DCM) and other cyanine dyes, 1-ethyl-2- (4-1 (p-dimethylaminoaminophenyl) 1-1,3-buta-geninole) pyridinium perchlorene Pyridine dyes such as (pyridine 1); rhodamine dyes such as rhodamine B and rhodamine 6G; and oxazine dyes.
- DCM 4-dicyanomethylene-12-methyl- 6- (p-dimethylaminostillyl) -14H pyran
- DCM 4-dicyanomethylene-12-methyl- 6- (p-dimethylaminostillyl) -14H pyran
- other cyanine dyes 1-ethyl-2- (4-1 (
- various dyes can also be selected as fluorescent dyes if they have fluorescence.
- the fluorescent dye is kneaded in advance into a pigment resin such as polymethacrylic acid ester, polyvinyl chloride, vinyl acetate vinyl acetate copolymer, alkyd resin, aromatic sulfonamide resin, urea resin, melanin resin, and benzoguanamine resin. May be used as a material.
- a pigment resin such as polymethacrylic acid ester, polyvinyl chloride, vinyl acetate vinyl acetate copolymer, alkyd resin, aromatic sulfonamide resin, urea resin, melanin resin, and benzoguanamine resin. May be used as a material.
- the binder resin is preferably a transparent material (having a light transmittance of 50% or more in visible light).
- transparent resins polymers
- polymers such as polymethyl methacrylate, polyatarylate, polycarbonate, polyvinyl alcohol, polyvinylinolepyrrolidone, hydroxyshethyl cellulose, and carboxymethyl cellulose are exemplified.
- a photosensitive resin to which the photolithography method can be applied in order to separate and arrange the fluorescent medium two-dimensionally.
- an acrylic acid-based, methacrylic acid-based, polyvinyl cinnamate-based, or ring rubber-based photocurable resist material having a reactive bur group can be used.
- a printing method is used, a printing ink (medium) using a transparent resin is selected.
- polyvinyl chloride resin for example, polyvinyl chloride resin,
- Lamin resin phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin monomer, oligomer, polymer, polymethyl methacrylate, poly atalylate, polycarbonate, polyvinyl chloride Transparent resins such as / real cornole, polyvinylinolepyrrolidone, hydroxystigresenolose and carboxymethylcellulose can be used.
- the CCM layer 14 is mainly composed of a fluorescent dye, it is preferable to form the film by a vacuum evaporation or sputtering method through a mask capable of obtaining a desired pattern of the CCM layer 14.
- the CCM layer 14 is made of a fluorescent dye and a resin
- the fluorescent dye, the resin and an appropriate solvent are mixed, dispersed or solubilized to form a liquid, and the liquid is spin-coated
- a film is formed by a method such as roll coating or a casting method, and then patterned into a desired pattern of the CCM layer 14 by a photolithography method, or patterned into a desired pattern by a method such as screen printing. It is preferable to form the CCM layer 14.
- the thickness of the CCM layer 14 is not particularly limited as long as it sufficiently receives (absorbs) the light emitted from the organic EL element 122 and does not interfere with the function of generating fluorescence.
- the thickness is preferably from 0 nm to 1,000 ⁇ m, more preferably from 0.1 ⁇ ⁇ ) to 500 ⁇ m, and still more preferably from 5 m to 100 ⁇ m.
- the reason for this is that if the thickness of the CCM layer 14 is less than 10 nm, the mechanical strength may be reduced or it may be difficult to laminate. On the other hand, when the thickness of the CCM layer 14 exceeds 1 mm, the light transmittance is significantly reduced, and the amount of light 5 that can be extracted to the outside is reduced, or it may be difficult to reduce the thickness of the organic EL light emitting device. That's why.
- the passivation film can prevent the volatile components from the resin film such as the CCM layer 14 underneath from coming into contact with the organic EL element 122, and can prevent visible light.
- Specific materials include transparent inorganic substances.
- ⁇ , ⁇ ,, ⁇ , ⁇ , ⁇ , ⁇ , ⁇ , nnn-Zn SnZn copper (CuIn), gold, platinum, and copper.
- transparent inorganic substances having a large work function such as a single kind of radiation or a combination of two or more kinds.
- the film is formed at a low temperature (200 ° C. or less) and at a low film forming rate so that the CCM layer 14 is not deteriorated.
- Evaporation, CVD, ion plating and the like are preferred.
- the thickness of the passivation film can be selected from the range of 0.01 ⁇ m to 100 ⁇ m depending on the definition of the organic EL element 122.
- the film thickness is in the range of 0.055 to 10 ⁇ 111, and more preferably, 0.1 ⁇ to 1 Atm. If the film thickness is less than 0.01 ⁇ , the volatile components cannot be blocked sufficiently. If the film thickness is larger than 100 m, the light of the organic EL element 122 is diffused and the desired CCM layer 14 is incident. Obstruction, visibility may be reduced (color bleeding, color mixing, viewing angle dependence).
- the organic EL display device 100 has the above-mentioned inorganic compound layer (surface protective layer 102) formed on the anode 16 included in the CCM substrate 124, and further has an organic EL layer thereon.
- An organic layer 18 (also referred to as an organic compound layer), which is a central material of the element 122, is laminated.
- the organic material layer 18 has at least a recombination region and a light-emitting region. The recombination region and the light emitting region are often present in a light emitting layer having a light emitting function. Therefore, in the present embodiment, only the light emitting layer may be used as the organic material layer 18.
- An organic layer 18 may include an adhesion improving layer and the like.
- a cathode 20 is formed on these organic layers 18.
- the portion from the anode 16 (transparent electrode) to the cathode 20 is referred to as an organic EL element 122. That is, in brief, the organic EL display device 100 is one in which the organic EL element 122 is formed on a substrate 12 made of glass or the like. In the present embodiment, these layers will be described from the next section, taking the following configuration already described as an organic EL element as an example.
- Transparent electrode anode
- Z surface protective layer Z hole injection layer
- Z light emitting layer Z electron injection layer
- Z electrode negative electrode
- the configuration in which the organic material layer 18 is composed of a hole injection layer / a light emitting layer and an electron injection layer is described as an example.
- an organic layer 18 composed of a single light emitting layer may be employed.
- Typical anode 16 materials include ITO (Indium Tin Oxide) and IZO, which have a large work function (4 eV or more).
- the anode 16 can be formed by forming a thin film from these electrode substances by a method such as an evaporation method or a sputtering method.
- the transmittance of the anode 16 with respect to the light emission be greater than 10%.
- the sheet resistance of the anode 16 is preferably several hundreds ⁇ or less ( ⁇ / m 2 ).
- the thickness of the anode 16 depends on the material, but is usually 11011111 to 1 // 111, 10 nrr! The preferred range is ⁇ 200 nm.
- a substrate electrode is used as the anode 16.
- an amorphous oxide as a material of the anode 16 and obtain good etching characteristics.
- the above-mentioned ITO is usually crystalline, but it can be made amorphous by forming a moisture atmosphere during film formation or by doping a trace element.
- a general formula (I) is used as a light-emitting material (host material).
- each of Y 1 to Y 4 is a hydrogen molecule, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 8 carbon atoms, substituted or unsubstituted. It represents an aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted cyclohexyl group, a substituted or unsubstituted aryloxy group having 6 to 18 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms.
- the substituent is an aryl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 8 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, and an acyl group having 1 to 6 carbon atoms.
- substituents may be single or plural.
- ⁇ 1 to ⁇ 4 may be the same or different from each other, and Y1 and ⁇ 2 and ⁇ 3 and ⁇ 4 are bonded to a mutually substituted group to form a substituted or unsubstituted saturated group.
- a membered ring or a substituted ring may form an unsubstituted saturated six-membered ring.
- Ar represents a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, which may be single-substituted or plurally substituted, and the bonding portion may be any of ortho, para and meta.
- Y 1 to Y 4 are each an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 8 carbon atoms, a substituted or unsubstituted naphthyl group, a biphenyl group. , A cyclohexyl group or an aryloxy group.
- distilarylane-based compounds include the following.
- Another preferable light-emitting material includes a metal complex of 8-hydroxyquinoline or a derivative thereof. Specifically, it is a metal chelate oxanoide compound containing a chelate of oxine (generally 8-quinolinol or 8-hydroxyquinoline). Such compounds exhibit high levels of performance and are easily formed in thin film form. Examples of this oxanoid compound satisfy the following structural formula.
- Mt represents a metal
- n is an integer of 1 to 3
- Z is an independent atom at each position, and atoms necessary for completing at least two or more fused aromatic rings. Is shown.
- the metal represented by Mt can be a monovalent, divalent or trivalent metal, for example, an alkali metal such as lithium, sodium, or potassium, or an alkali metal such as magnesium or calcium.
- Earth metal or earth metal such as boron or aluminum.
- any of the monovalent, divalent or trivalent metals known to be useful chelating compounds can be used.
- Z represents an atom at least one of two or more fused aromatic rings forms a heterocyclic ring composed of azole or azine.
- another different ring can be added to the above-mentioned condensed aromatic ring.
- the number of atoms represented by Z is preferably maintained at 18 or less.
- specific examples of chelated oxanoide compounds include tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis (benzo-18-quinolinol) zinc, and bis (2-methyl-8-quinolinolate).
- Tris (8-quinolinol) indium Tris (5-methyl-8_quinolinol) Aluminum-lithium, 8-Quinolinol lithium, Tris (5-Chloro-8-quinolinol) Gallium, Bis (5-Chloro-8-) Quinolino) canolesium, 5,7-dichlonole 8—quinolino phenolic minimum, tris (5,7—dipromo 8—hydroxy quinolinol ⁇ ) phenolic miniature.
- the metal complex of fujunolato-substituted 8-hydroxyquinoline described in Japanese Patent Application Laid-Open No. 5-198378 is preferable as a blue light-emitting material.
- Specific examples of the metal complex of the fulerate-substituted 8-hydroxyquinoline include bis (2-methyl-18-quinolinolate) (phenolate) aluminum (III), bis (2-methyl-8-quinolinolate) (o-cresolate) ) Aluminum (III), bis (2-methyl-18-quinolinolate) (m-cresolate) aluminum (III), bis (2-methyl-8-quinolinolate) (p-cresolate) aluminum (III), bis ( 2-Methyl-8-quinolinolate) (0-phenylphenolate) aluminum (III), bis (2-methyl_8-quinolinolate) (m-phenylphenolate) aluminum (III), bis (2-) Methyl-8-quinolinolate) (p-feuylphenolate) aluminum (III), bis (2-
- the light emitting layer when white light is emitted, the light-emitting layer often has a two-layer structure. These are called a first light emitting layer and a second light emitting layer.
- a preferable first light-emitting layer is a green fluorescent dye containing 0.2 to 3% by weight of the above oxanoide compound. A small amount may be added.
- the green fluorescent dyes added here are coumarin-based and quinacridone-based.
- the element having the first light-emitting layer can realize high efficiency green light emission of 5 to 20 (1 / w).
- a compound obtained by adding 0.2 to 3% by weight of rubrene and a derivative thereof, a dicyanopyran derivative, and a perylene derivative to an oxanoide compound is used. These devices can emit light with high efficiency of 3 to 10 (lm / w). An orange color is possible even if green and red fluorescent dyes are added simultaneously.
- coumarin and a dicyanopyran dye, quinacridone and a perylene dye, and coumarin and a perylene dye may be preferably used simultaneously.
- Another particularly preferred first emissive layer is a polyarylene biene derivative. This can output green or orange with high efficiency.
- the second light emitting layer used in the present embodiment various known blue light emitting materials can be used.
- distyryl arylene derivatives, tris styryl arylene derivatives, and aryloxylated quinolylate metal complexes are blue light-emitting materials that can emit blue light with high efficiency and high purity.
- the polymer include a polyparaphenylenediline derivative.
- the light emitting layer in the organic EL element used in the present embodiment may be formed by thinning the film by a known method such as a vapor deposition method, a spin coating method, a casting method, and an LB method.
- a molecular deposition film refers to a thin film formed by depositing the compound from a gaseous state or a film formed by solidifying the compound from a molten state or a liquid state.
- this molecular deposition film can be distinguished from the thin film (molecule accumulation film) formed by the LB method by the difference in the aggregation structure and the higher-order structure, and the resulting functional difference.
- the light emitting layer can be formed by dissolving in a solvent together with a binder such as a resin to form a solution, and then thinning the solution by spin coating or the like.
- the thickness of the light emitting layer formed in this manner is not particularly limited and can be appropriately selected according to the situation, but is preferably 1 nm to 10 ⁇ m, and particularly preferably 5 nm to 5 ⁇ m. 111).
- the hole injection layer is not an essential component as the organic EL display device 100,
- This hole injection layer is a layer that assists the injection of holes into the light emitting layer, and has a high hole mobility and a small ionization energy of usually 5.5 eV or less.
- a material that transports holes to the light emitting layer with a lower electric field is preferable, and the mobility of holes is at least 10 4 to 10 6 VZcm when an electric field is applied.
- a hole injecting material There is no particular limitation on such a hole injecting material as long as it has the above-mentioned preferable properties.
- a material commonly used as a hole charge transporting material or an EL element Any of the known materials used for the hole injection layer can be selected and used.
- JP-A-54-59143 JP-A-55-52063, JP-A-55-5-2064, JP-A-55-46760, JP-A-55-85495 JP-A-57-111350, JP-A-57-148749, JP-A-2- Japanese Patent Application Laid-Open (JP-A) No. 311591, Japanese Patent Application Laid-Open No. Sho 56-46234, and stilbene derivatives (Japanese Patent Application Laid-Open No. Sho 61-210363, Japanese Patent Application Laid-Open No. 61-22845) No. 1, No. 61-14642, No. 61-72525, No. 62-47646, No. 6'2-36667, No. 62-10652, No. 62-30255, 60-93
- the above-mentioned materials can be used, but porphyrin compounds (those disclosed in JP-A-63-29556965), aromatic tertiary amine compounds and stilamine compounds (U.S. Pat. No. 4,127,412, JP-A-53-27033, JP-A-54-58445, JP-A-54-149)
- porphyrin compounds include porphine, 1,10,15,20-tetraphenylene 21 H, 23 H-porphine copper (11), 1,10,15,20-tetraphenylene 21 H, 23 H-porphine zinc (II), 5, 10, 15, 20-tetrakis (pentafluorophenyl) 21H, 23 H-porphine, silicon phthalocyanine-oxide, aluminum phthalocyanine chloride, phthalocyanine (metal-free) And dilithium phthalocyanine, copper tetramethyl phthalocyanine, the same phthalocyanine, chromium phthalocyanine, zinc phthalocyanine, n, phthalocyanine, titanium phthalocyanine oxide, Mg phthalocyanine, copper octamethyl phthalocyanine, and the like.
- aromatic tertiary amine compounds and styrylamine compounds include N, N, N ', N'-tetraphenyl 4,4' diaminophenyl and N, N'-diphenyl.
- NPD 4,4,1-bis [N- (1-naphthyl) -1N-phenylamino] biphenyl
- JP-A-4-308688 4,4,1-bis [N- (1-naphthyl) -1N-phenylamino] biphenyl
- Inorganic compounds such as P-type Si and p-type SiC can also be used as a material for the hole injection layer.
- the hole injection layer can be formed by thinning the above-mentioned compound by a known method such as a vacuum evaporation method, a spin coating method, a casting method, and an LB method.
- the thickness of the hole injection layer is not particularly limited, but is usually 5 nm to 5 ⁇ .
- the hole injection layer may be composed of one or more of the above-described materials, or may be a layer obtained by laminating a hole injection layer made of a compound different from the hole injection layer. It may be.
- the organic semiconductor layer is a layer that assists hole injection or electron injection into the light emitting layer, and preferably has a conductivity of 10-10 S / cm or more.
- conductive oligomers such as thiophene-containing oligomers and arylamine-containing oligomers
- conductive dendrimers such as arylamine-containing dendrimers
- the electron injection layer is a layer that assists the injection of electrons into the light emitting layer, has a large electron transfer
- the adhesion improving layer is made of a material that has particularly good adhesion to the cathode in the electron injection layer.
- Layer As a material used for the electron injection layer, for example, a metal complex of 8-hydroxyquinoline or a derivative thereof, or an oxadiazole derivative is preferably used. In addition, as a material used for the adhesion improving layer, a metal complex of 8-hydroxyquinoline or a derivative thereof is particularly preferable.
- metal complex of 8-hydroxyquinoline or a derivative thereof include a metal chelate oxanoid compound containing a chelate of oxine (generally, 8-quinolinol or 8-hydroxyquinoline).
- oxadiazole derivatives include those represented by the following general formulas (11), (III) and (IV).
- Ar 10 to Ar 13 each represent a substituted or unsubstituted aryl group, and Ar 10 and Ar 11 and Ar 12 and Ar 13 may be the same or different from each other.
- Ar 14 may represent a substituted or unsubstituted arylene group.
- the aryl group includes a phenyl group, a biphenyl group, an anthranyl group, a perylenyl group, a pyrenyl group, and the like.
- the arylene group includes a phenylene group, a naphthylene group, a biphenylene group, an anthracenylene group, and a ureyl group.
- the electron transfer compound is preferably a thin film-forming compound. Specific examples of the electron transfer compound include a compound represented by the following formula.
- the cathode 20 a metal, an alloy, an electrically conductive compound, and a mixture thereof having a low work function (4 eV or less) as an electrode material are used.
- the electrode substance include sodium, sodium mono-potassium alloy, magnesium, lithium, magnesium 'silver alloy, aluminum / aluminum oxide (A 1 ⁇ 3), aluminum-lithium alloy, indium, rare earth metals can be mentioned.
- the cathode 20 can be formed by forming a thin film of these electrode substances by a method such as evaporation or sputtering. Further, the sheet resistance of the cathode 20 is preferably several hundreds or less, and the film thickness can be usually selected from 10 nm to 1 ⁇ , and particularly preferably in the range of 50 to 200 nm.
- the anode 16 or the cathode In the organic EL device used in the present embodiment, the anode 16 or the cathode
- one of the two is transparent or translucent. This is because if the material is transparent or translucent, light is transmitted, so that the efficiency of extracting light is good.
- the electrode laminated on the substrate 12 side is called a substrate electrode. Therefore, the anode 16 already described above is a substrate electrode.
- the method for laminating the substrate electrodes is not particularly limited, but includes, for example, an evaporation method, a sputtering method, an ion plating method, an electron beam evaporation method, a CVD method (CVD: Chemical Vapor Deposition), MO Dry film forming methods such as CVD (MOC VD: Metalorganic CVD) and plasma CVD are preferable.
- the anode 16 is also laminated by such a lamination method. . b.
- the layers are stacked by a method similar to the method described in “(7) Light-emitting layer” above.
- the electrode facing the substrate electrode is called a counter electrode. Therefore, the cathode 20 already described above is a counter electrode.
- the counter electrode is also laminated in the same manner as the substrate electrode.
- the surface protection layer 102 is provided on the anode 16 on the CCM substrate 124 (sometimes referred to as a CCM electrode substrate).
- the CCM substrate 124 sometimes referred to as a CCM electrode substrate.
- V259 BK (manufactured by Nippon Steel Chemical Co., Ltd.) as a material for black matrix (BM) is spin-coated on a 102 mmX 13 3 mmX 1.1 mm support substrate (OA 2 glass: manufactured by Nippon Electric Glass Co., Ltd.). Exposure to UV light to form a pattern, 2
- the resultant was baked (baked) at 200 ° C. to form a black matrix (pattern having a thickness of 1.).
- V259B (manufactured by Nippon Steel Chemical Co., Ltd.) is spin-coated to obtain 320 rectangular (90 m line, 240 m gap) stripe patterns.
- a photomask like this align with the BM, expose to ultraviolet light, develop with 2% sodium carbonate aqueous solution, bake (bake) at 200 ° C, and apply the blue color filter (film thickness 5 m) pattern was formed.
- V255G produced by Nippon Steel Chemical Co., Ltd.
- V255G produced by Nippon Steel Chemical Co., Ltd.
- 320 strips 90 ⁇ line, 240 zm gap.
- photomask that can be used, align with the BM, expose to ultraviolet light, develop with 2% sodium carbonate aqueous solution, bake (bake) at 200 ° C, green next to the blue color filter A pattern of color filters (film thickness 1.5 ⁇ m) was formed.
- red color filter As a material for the red color filter, V259R (manufactured by Nippon Steel Chemical Co., Ltd.) was spin-coated, and a rectangular (90 ⁇ m line, 240 / m gear gap) stripe pattern was 3 2 Through a photomask such as that obtained above, it was aligned with the BM and exposed to ultraviolet light to form a red color filter (film thickness 1.5 ⁇ ) pattern between the blue color filter and the green color filter.
- V259R manufactured by Nippon Steel Chemical Co., Ltd.
- This ink is spin-coated on the substrate, exposed to ultraviolet light on the green color filter, developed with a 2% aqueous solution of sodium carbonate, baked at 200 ° C, and baked on the green color filter. Then, a green conversion film pattern (thickness ⁇ ⁇ ) was formed.
- coumarin 6 0.53 g
- basic violet 11 1.5 g
- rhodamine 6G 1.5 g
- acryl-based negative photoresist V2559 PA, solid content concentration 50%: manufactured by Nippon Steel Chemical Co., Ltd.
- This ink is spin-coated on the previous substrate, and ultraviolet light is applied on the red color filter.
- thermosetting resin V259PH: Nippon Steel Chemical Co., Ltd.
- V259PH Nippon Steel Chemical Co., Ltd.
- the water vapor transmission rate was less than 0.1 g / m 2 ⁇ day.
- IZO indium zinc oxide
- a positive resist (HPR204: manufactured by Fuji Film Arch) is applied on this substrate via a photomask that forms a stripe pattern with a 1590 m line and a 20 m gap.
- the resist pattern is aligned with the color filter pattern, exposed to ultraviolet light, developed with TMAH (tetramethylammonium hydroxide) developer, beta-treated (baked) at 130 ° C, and the resist pattern is removed. Obtained.
- the exposed portion of IZO was etched using an IZO etchant composed of a 5% oxalic acid aqueous solution.
- the resist is treated with a stripping solution containing ethanolamine as a main component (N303: manufactured by Changsheng Sangyo) to obtain an IZO pattern (lower electrode: 16 anodes, 9600 lines).
- a stripping solution containing ethanolamine as a main component N303: manufactured by Changsheng Sangyo
- a negative resist (V259PA: manufactured by Nippon Steel Chemical Co., Ltd.) is spin-coated, exposed to ultraviolet light, and developed with a developing solution of TMAH (tetramethylammonium 5-hydroxide). did.
- TMAH tetramethylammonium 5-hydroxide
- beta sintering was performed at 180 ° C. to cover the edges of the ITO so that the opening of IZO was 70 ⁇ 290 ⁇ .
- a negative resist ZPN 110: manufactured by Nippon Zeon
- a 20 ⁇ line and a 310 m gap are applied.
- Baking was carried out after exposure to ultraviolet light, and further after exposure through a photomask that would form a lip pattern.
- the negative resist was developed with a developing solution of TMAH (tetramethylammonium hydroxide) to form a second interlayer insulating film (partition) of an organic film orthogonal to the IZO stripe.
- TMAH tetramethylammonium hydroxide
- Si 2 was formed by inductively coupled RF plasma-assisted magnetron sputtering (hereinafter referred to as “helical sputtering”). The detailed procedure is as follows. '
- the cleaned substrate was set in a sputtering chamber and evacuated.
- the distance from the target S io 2 to the substrate is 30 cm.
- the substrate was moved inside an organic vapor deposition system (made by Nippon Vacuum Technology), and the substrate was fixed to a substrate holder.
- the organic vapor deposition apparatus is provided with a heating port made of molybdenum.
- Each molybdenum heating port is pre-filled with various materials.
- hole injection materials 4, 4 ', 4 "tris [N— (3-methylphenyl) -1-N-phenylamino] triphenyl / reamine (MTDATA), 4,4,1-bis [N_ ( 1-naphthyl) 1-N-phenylenamino] biphenyl (NPD) 4,4'-bis (2,2- ⁇ phenylvinyl) biphenyl (DPVB i
- the dopant is 1,4-bis [4- (N, N-diphenylaminostyrylbenzene)] (DPAVB), and the electron injecting material is Tris ( 8—Quinolinol) Aluminum (Alq) and Li are charged, and A1 is charged as the cathode 20.
- MTDATA was formed at a deposition rate of 0.1 to 0.3 nm / sec to obtain a film thickness of 60 nm. Further, NPD was deposited at a deposition rate of 0.1 to 0.3 nm / sec to obtain a film thickness of 20 nm.
- DPVBi and DPAVB were co-deposited at a deposition rate of 0.1 to 0.311111 seconds and a deposition rate of 0.03 to 0.05 nm / sec, respectively, to obtain a film thickness of 50 nm.
- A1q was deposited at a deposition rate of 0.1 to 0.3 nm / sec to obtain a film thickness of 20 nm. Furthermore, Alq and Li were co-evaporated at 0.1 to 0.3 nm / sec and 0.005 nmZ, respectively, to form films, and a film thickness of 20 nm was obtained. Finally, A1 was formed as the cathode 20 at a deposition rate of 0.1 to 0.3 nm / sec to form a cathode 20 having a thickness of 150 nm. Thus, an organic EL device was produced.
- the substrate was moved into a glove box circulated with dry nitrogen (dew point: 50 ° C), and the display was covered with a blue glass of 102 mm x 133 mm x 1.1 mm.
- a light-cured adhesive (TB3102: made by Three Bond) was used for bonding, and a passive organic EL display device was manufactured.
- the blue pixels were 10 cd / m 2 (assuming the initial value was 1, the ratio was 67), and the green pixels were 27 cd / m 2 (If the initial value is 1, the ratio is 0.60), the red pixel is 9 cd / m 2 (if the initial value is 1, the ratio is 0.60), and the luminance of the organic EL element is 126 cd / m 2 (Assuming the initial value is 1, the ratio was 0.63).
- the luminance degradation of the organic EL element depends on the driving conditions described above. Under the same driving conditions, if the initial value was 1, the ratio was 0.65.o
- the emission luminance was measured using a colorimeter (CS100, manufactured by Minolta).
- CS100 blue color filter
- 11 c (1/111 2 ) ⁇ IE chromaticity coordinates X 0.15
- Y 0.16 blue light emission
- the blue pixel was 6 cd / m 2 (assuming the initial value was 1, the ratio was 5 5), and the green pixel was 16 cd dZ m 2 (when the initial value 1, the ratio 0.48), (equal to 1 the initial value, a ratio 0.50) red pixel S c DZM 2 a, the luminance of the organic EL element 84 cd / m 2 (first If the term value is 1, the ratio is 0.56).
- the luminance of the organic EL element when the organic EL element on the substrate without the CCM and on which the step of forming the surface protective layer was not performed is sealed with an inert gas such as ordinary dry nitrogen. Under these driving conditions, the degradation was 0.58, with the initial value being 1.
- the progress speed of the deterioration of the light emission luminance is suppressed when the surface protective layer 102 is formed as compared with the case where the film is not formed.
- the surface protective layer 102 was formed on the anode 16, the light emission performance was improved, and the stability (that is, the life) of the panel during continuous driving was improved.
- Embodiment 2 Example including TFT in configuration
- the anode 16 is shown on the CCM layer 14.
- the driving method of the anode 16 is not particularly shown in FIG. 1, for example, it is also preferable to drive the anode 16 with a thin film transistor (TFT).
- TFT thin film transistor
- FIG. 3 is a schematic cross-sectional view of one color portion in one pixel shown in FIG. That is, red in Fig. 1,
- a CCM layer 14 is provided on a substrate 12.
- an overcoat layer 210 and a passivation film 212 are provided on the CCM layer 14.
- a gate 226 of the thin film transistor 220 is provided, and an insulating film 230 is further laminated so as to cover the gate.
- anode 16 and a drain 222 and a source 222 of a thin film transistor 220 driving the anode 16 are formed on the insulating film 230.
- the drain 2 24 is electrically connected to the anode 16.
- a characteristic feature of the second embodiment is that the anode 16 is driven by a thin film transistor (TFT).
- TFT thin film transistor
- the power supply to the anode 16 is controlled by the potential applied to the gate 22 of the thin film transistor 220.
- the thin film transistor 220 corresponds to an example of a “driving element” in the claims.
- a surface protective layer 102 is provided on the anode 16, but a thin film transistor 220 may be provided on the same layer as the anode. This is shown in the second embodiment.
- the second embodiment is essentially different from FIG. 2 only in that anode 16 is driven by thin film transistor 220. That is, the surface protective layer 102 is provided on the anode and the thin film transistor 220 as in FIG. This surface protective layer is the same as the surface protective layer 102 described so far.
- an organic material layer 18 and a cathode 20 are provided on the surface protective layer 102, and an organic EL display device 200 is constituted as a whole.
- the thin film transistor 220 is used as the driving method of the anode 16.
- other various driving elements and driving methods can be appropriately used.
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US8487301B2 (en) | 2010-07-07 | 2013-07-16 | Samsung Display Co., Ltd. | Organic light-emitting display device and method of manufacturing the same |
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JP6134191B2 (ja) | 2013-04-07 | 2017-05-24 | 村川 惠美 | 回転型セミバッチald装置 |
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KR102646618B1 (ko) * | 2017-01-11 | 2024-03-12 | 삼성디스플레이 주식회사 | 표시 장치 및 표시 장치의 제조 방법 |
CN107134535B (zh) * | 2017-05-09 | 2019-01-04 | 京东方科技集团股份有限公司 | 有机电致发光器件及其制备方法、显示装置 |
JP6550514B2 (ja) * | 2017-11-29 | 2019-07-24 | 株式会社神戸製鋼所 | ディスプレイ用酸化物半導体薄膜、ディスプレイ用薄膜トランジスタ及びディスプレイ用スパッタリングターゲット |
CN110579459B (zh) * | 2019-10-08 | 2021-12-28 | 西南民族大学 | 一种磁响应性荧光纳米材料的用途及其制备方法 |
CN111162108A (zh) * | 2020-01-02 | 2020-05-15 | 京东方科技集团股份有限公司 | 一种显示面板、其制作方法及显示装置 |
CN112811882B (zh) * | 2021-01-11 | 2022-04-22 | 湖南省美程陶瓷科技有限公司 | 一种高稳定传感器陶瓷材料及其制备方法 |
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- 2004-04-06 WO PCT/JP2004/004971 patent/WO2005101915A1/ja not_active Application Discontinuation
- 2004-04-06 EP EP04725987A patent/EP1734794A1/en not_active Withdrawn
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8487301B2 (en) | 2010-07-07 | 2013-07-16 | Samsung Display Co., Ltd. | Organic light-emitting display device and method of manufacturing the same |
US8716058B2 (en) | 2010-07-07 | 2014-05-06 | Samsung Display Co., Ltd. | Organic light-emitting display device and method of manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
CN1926926A (zh) | 2007-03-07 |
US20070247066A1 (en) | 2007-10-25 |
EP1734794A1 (en) | 2006-12-20 |
WO2005101915A9 (ja) | 2006-01-05 |
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