WO2006070716A1 - 有機エレクトロルミネッセンス素子及びその製造方法 - Google Patents
有機エレクトロルミネッセンス素子及びその製造方法 Download PDFInfo
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- WO2006070716A1 WO2006070716A1 PCT/JP2005/023718 JP2005023718W WO2006070716A1 WO 2006070716 A1 WO2006070716 A1 WO 2006070716A1 JP 2005023718 W JP2005023718 W JP 2005023718W WO 2006070716 A1 WO2006070716 A1 WO 2006070716A1
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- 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
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- 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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/15—Deposition of organic active material using liquid deposition, e.g. spin coating characterised by the solvent used
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1003—Carbocyclic compounds
- C09K2211/1007—Non-condensed systems
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1003—Carbocyclic compounds
- C09K2211/1011—Condensed systems
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
Definitions
- the present invention relates to an organic electoluminescence (EL) element and a method for producing the same, and more particularly to a method for producing an organic EL element by a wet method.
- EL organic electoluminescence
- An organic EL display device is composed of an organic EL element in which a light emitting layer containing organic light emitting molecules is sandwiched between an anode and a cathode facing each other.
- a voltage is applied between both electrodes of the organic EL element, electrons injected from the cathode and holes injected from the anode recombine in the light emitting layer.
- the organic light-emitting molecule becomes an excited state as a result of recombination energy, and then returns from the excited state to the ground state.
- the organic EL device emits light by extracting the energy released at this time as light.
- An organic EL display device composed of an organic EL element having such a light emission principle is a completely solid element, has excellent visibility, can be reduced in weight and thinned, and is only a few volts. It can be driven at a low voltage. For this reason, organic EL display devices are expected to be used as color displays and are currently being actively researched.
- the organic EL element is a current-driven light-emitting element, and the element generates heat during high-current light emission. Therefore, if there is oxygen or moisture around each laminated film or the element, the element constituent material is Oxidation is promoted, and there is a problem that light emission defects due to alteration of constituent materials, so-called dark spots, are generated and grown. In other words, oxygen and water decrease the brightness of the organic EL device and shorten the lifetime. Therefore, in order to eliminate the influence of oxygen and moisture, for example, Patent Document 1 specifies that the oxygen concentration in the light-emitting element is 1 ⁇ 10 19 / cm 3 or less. .
- Patent Document 2 proposes manufacturing an organic EL element in an inert gas having a moisture content of 5% or less and an oxygen concentration of 4000 ppm or less.
- Patent Document 3 proposes manufacturing an organic EL element in an inert gas atmosphere having an oxygen concentration of lOOppm or less.
- each layer of the organic EL element is generally formed by a dry method such as a vacuum vapor deposition method.
- a dry method such as a vacuum vapor deposition method.
- coating is performed. Wet methods such as liquid coating and printing have been attempted (for example, Patent Documents 2 to 5).
- An object of the present invention is to provide an organic EL device having high luminance and a long lifetime and a method for producing the same.
- Patent Document 1 JP 2002-203682 A
- Patent Document 2 JP 2004-55225 A
- Patent Document 3 Japanese Patent Laid-Open No. 2004-55452
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2004-164873
- Patent Document 5 Japanese Unexamined Patent Application Publication No. 2004-193101
- the following organic EL device and method for producing the same are provided.
- An organic thin film layer having at least one light-emitting layer including at least a light-emitting layer is sandwiched between an anode and a cathode.
- An organic electoluminescence device wherein an oxygen concentration in at least one layer of the organic thin film layer is 2000 ppm or less.
- a method for producing an organic electoluminescence device comprising:
- a method for producing an organic electoluminescence device, wherein the layer having an oxygen concentration of 2000 ppm or less is produced by a wet method.
- an organic EL device having high luminance and a long lifetime and a method for producing the same can be provided. wear.
- FIG. 1 is a cross-sectional view showing one embodiment of an organic EL device of the present invention.
- FIG. 2 is a graph showing the results of measuring the oxygen concentration in the film produced in Production Example 1 by the SIMS method.
- one or a plurality of organic thin film layers having a laminar force including at least a light emitting layer are sandwiched between an anode and a cathode, and the oxygen concentration in at least one layer of the organic thin film layer Is 2000ppm or less. Preferably it is lOOOppm or less.
- the oxygen concentration in the film is measured by secondary ion mass spectrometry (SIMS).
- the oxygen concentration in the whole organic thin film layer is preferably 2000 ppm or less, more preferably 10 ppm or less.
- FIG. 1 is a cross-sectional view showing one embodiment of the organic EL element of the present invention.
- an organic thin film layer 20 including a hole injection layer 22, a light emitting layer 24, and an electron injection layer 26 is sandwiched between a cathode 30 and an anode 10.
- the oxygen concentration in at least one of the hole injection layer 22, the light emitting layer 24, and the electron injection layer 26 is 2000 ppm or less.
- the oxygen concentration in the light emitting layer 24 is 2000 ppm or less.
- the oxygen concentration in the layer composed of all of the hole injection layer 22, the light emitting layer 24, and the electron injection layer 26 is preferably 2000 ppm or less.
- Layers with an oxygen concentration of 2000 ppm or less are preferably produced by a wet process.
- wet methods are manufactured using a solution in which a specific compound is dissolved in a solvent, such as coating method, injection method, spray method, spin coating method, dipping coating method, screen printing method, roll coater method, LB method, etc. It is a method to do.
- a solvent such as coating method, injection method, spray method, spin coating method, dipping coating method, screen printing method, roll coater method, LB method, etc. It is a method to do.
- the oxygen concentration in the layer can be reduced to 2000 ppm or less by reducing the oxygen concentration in the solution or lowering the film-forming atmosphere.
- the water content is preferably 10 ppm or less and an acid content.
- the film is formed in an inert gas atmosphere having an elemental concentration of 10 ppm or less, more preferably a moisture content of 5 ppm or less and an oxygen concentration of 5 ppm or less.
- the inert gas include nitrogen, argon, helium and the like.
- the moisture content in gas can be calculated
- the oxygen concentration can be measured with an oximeter.
- the moisture content in the inert gas can be lowered by drying using a desiccant such as molecular sieves.
- the oxygen concentration in the inert gas can be lowered by reacting with a platinum catalyst or the like, or by adsorbing to an oxygen scavenger.
- the water content of the solution is 20 ppm or less and the oxygen concentration is 10 ppm or less, more preferably the water content in the solution is 10 ppm or less and the oxygen concentration is 5 ppm or less.
- the rate can be measured by Karl Fischer titration, and the oxygen concentration can be measured by a dissolved oxygen concentration meter.
- Methods for lowering the water concentration and oxygen concentration in the solution are generally distillation purification, publishing with an inert gas such as argon nitrogen, drying using a drying material typified by molecular sieves, and deaeration. Examples include a method using a device (degasser), freeze deaeration, and freeze drying.
- Examples of the solvent that dissolves the luminescent compound used in the wet method include methanol ethanol, propanol, isopropanol, n-butanol, t-butanol, pentanol, hexanol, cyclohexanol, methanol.
- Halogen hydrocarbon solvents such as toluene, ether solvents such as dibutyl ether tetrahydrofuran, dioxane and anisole, aromatic solvents such as benzene, toluene, xylene and ethylbenzene, hexane, octane, decane and tetralin Paraffin solvent, vinegar
- Ester solvents such as ethyl acid, butyl acetate, amyl acetate, amide solvents such as N, N-dimethylphenolemamide, N, N-dimethylacetamide, N-
- one or more organic layers sandwiched between the anode and the cathode correspond to the organic thin film layer.
- an anthracene compound or pyrene compound described in Japanese Patent Application No. PCTZJP03Z 10402, PCT / JP2004 / 018111, Japanese Patent Application No. 2004-157571 may be used as the light emitting compound. it can. At this time, fluorescent or phosphorescent dopan May contain.
- a styrylamine compound represented by the following formula (1) or an arylamine compound represented by the formula (2) can be preferably used.
- Ar 1 is a group selected from phenyl, biphenyl, terphenyl, stilbene, distylinolealino and Ar 2 and Ar 3 are each a hydrogen atom or an aromatic group having 6 to 20 carbon atoms. And 8 to 8! " 3 may be substituted.
- P is an integer of:! To 4 and more preferably Ar 2 and Z or Ar 3 are substituted with a styryl group.
- the aromatic group having 6 to 20 carbon atoms is preferably a phenyl group, a naphthyl group, an anthranyl group, a phenanthryl group, a terphenyl group, or the like.
- Ar 4 to Ar ′′ are aryl groups having 5 to 40 nuclear atoms which may be substituted.
- Q is an integer of:! To 4)
- aryl groups having 5 to 40 nuclear atoms include phenyl, naphthyl, anthranyl, phenanthryl, pyreninole, coroninole, biphenylinole, terfeninole, pyrrolylyl, furaninole, thiophenyl, and benzothiol.
- aryl group having 5 to 40 nucleus atoms may be substituted with a substituent.
- Preferred substituents include alkyl groups having 6 to 6 carbon atoms (ethyl group, methyl group, i-propyl group).
- the phosphorescent dopant is selected from iridium (Ir), ruthenium (Ru), paradium (Pd), platinum (Pt), osmium (Os) and rhenium (Re).
- the ligand that is preferably a metal complex containing at least one metal preferably has at least one skeleton selected from the group consisting of a phenylpyridine skeleton, a bibilidyl skeleton, and a phenantorin phosphorus skeleton.
- metal complexes are, for example, tris (2-phenylpyridine) iridium, tris (2-phenylpyridine) northenium, tris (2-phenylpyridine) palladium, bis (2-phenylpyridine) platinum. , Tris (2-phenylpyridine) osmium, tris (2-phenylpyridine) rhenium, otataethylplatinum porphyrin, octaphenylplatinum porphyrin, otataethylpalladium porphyrin, octaphenylpalladium porphyrin, etc.
- the appropriate complex is selected based on the required emission color, device performance, and hostig compound.
- the hole injection / transport layer is a layer that assists hole injection into the light-emitting layer and transports it to the light-emitting region, and has a large ion mobility and a low ion energy of usually 5.5 eV or less.
- a material that transports holes to the light-emitting layer with a lower electric field strength is preferable for such a hole injection and transport layer.
- the mobility force of holes is small, for example, when an electric field of 10 4 to 10 6 VZcm is applied. both preferred if 10_ 4 cm 2 ZV. sec.
- the material for forming the hole injecting and transporting layer is not particularly limited as long as it has the above-mentioned preferable properties, and is conventionally used as a charge transporting material for holes in photoconductive materials.
- any known medium force used for the hole injection layer of the organic EL element can be selected and used.
- aromatic tertiary amines, hydrazone derivatives, force rubazole derivatives, triazole derivatives, imidazole derivatives, Examples include dicarbazole, polyethylene dioxythiophene 'polysulfonic acid (PEDOT' PS S), and the like. Specific examples include triazole derivatives (see US Pat. No. 3,112,197), oxadiazole derivatives (see US Pat. No.
- the above-described materials can be used.
- S porphyrin compounds, aromatic tertiary amine compounds and styrylamine compounds (US Pat. No. 4,127,412 Meitoda , JP-A-53-27033, 54-58445, 54-149634, 54-64299, 55-79450, 55-144250, 5 6- 119132, 61-295558, 61-98353, 63-295, 695, etc.), in particular, an aromatic tertiary amine compound is preferably used.
- inorganic compounds such as p-type Si and p-type SiC can also be used as the material for the hole injection layer.
- the hole injection / transport layer may be composed of one or more of the above-mentioned materials, or may be a layer in which hole injection / transport layers composed of different compounds are laminated. You can do it.
- the organic semiconductor layer is a layer for helping the injection of holes or electrons into the emitting layer, and is preferably a layer having a conductivity of more than 10 _ 10 S / cm.
- Examples of the material for such an organic semiconductor layer include thiophene oligomers, conductive oligomers such as arylamine amines disclosed in JP-A-8-193191, and conductive agents such as arylamine dendrimers. Dendrimers and the like can be used.
- the electron injection layer is a layer that assists the injection of electrons into the light emitting layer, and has a high electron mobility
- the adhesion improving layer is made of a material that has particularly good adhesion to the cathode among the electron injection layers. It is a layer.
- As a material used for the electron injecting layer 8-hydroxyquinoline, a metal complex of the derivative thereof, a oxadiazole derivative is preferable.
- metal complexes of 8-hydroxyquinoline or its derivatives include metal chelate oxinoid compounds containing a chelate of oxine (generally 8_quinolinol or 8-hydroxyquinoline).
- metal chelate oxinoid compounds containing a chelate of oxine generally 8_quinolinol or 8-hydroxyquinoline.
- tris (8-quinolinol) aluminum (Alq) can be used for the electron injection layer.
- examples of the oxadiazole derivative include an electron transfer compound represented by the following formula.
- Ar 1 ′, Ar 2 ′, Ar 3 ′, Ar 5 ′, Ar 6 ′, Ar 9 ′ each represent a substituted or unsubstituted aryl group, and may be the same or different from each other.
- Ar 4 ′, Ar 7 ′, Ar 8 ′ are substituted or unsubstituted arylene groups, which may be the same or different.
- 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 include a phenylene group, a naphthylene group, a biphenylene group, an anthranylene group, a peryleneylene group, and a pyrenylene group.
- examples of the substituent include an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a cyan group.
- This electron transfer compound is preferably a thin film-forming compound.
- an organic EL element it is possible to effectively prevent leakage of current, which can be further provided with an electron injection layer composed of an insulator or a semiconductor, between the cathode and the organic layer, thereby improving electron injection properties. That power S.
- an insulator it is preferable to use at least one metal compound selected from the group consisting of alkali metal chalcogenides, alkaline earth metal chalcogenides, alkali metal halides and alkaline earth metal halides. . Electron injection layer force S It is preferable that the material is composed of these alkali metal chalcogenides and the like because the electron injection property can be further improved.
- preferable alkali metal chalcogenides include, for example, LiO, LiO, Na S, Na Se and NaO.
- potash earth metal chalcogenide examples include CaO, BaO, SrO, BeO, BaS, and CaSe.
- preferable alkali metal halides include, for example, LiF, NaF, KF, LiCl, KC1, and NaCl.
- Preferred alkaline earth metal halides include fluorides such as CaF, BaF, SrF, MgF, and BeF.
- the semiconductor Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta, One kind or a combination of two or more kinds of oxides, nitrides or oxynitrides containing at least one element of Sb and Zn can be used.
- the inorganic compound constituting the electron transport layer is preferably a microcrystalline or amorphous insulating thin film. If the electron transport layer is composed of these insulating thin films, a more uniform thin film is formed, and pixel defects such as dark spots can be reduced. Examples of such inorganic compounds include the aforementioned alkali metal chalcogenides, alkaline earth metal chalcogenides, alkali metal halides, and alkaline earth metal halides.
- an organic EL element applies an electric field to an ultra-thin film, pixel defects due to leakage or short-circuiting are likely to occur. In order to prevent this, it is preferable to insert an insulating thin film layer between the pair of electrodes.
- Examples of the material used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, oxidizing power, subsequentlyium, calcium fluoride, aluminum nitride, titanium oxide, Examples thereof include silicon oxide, germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, and vanadium oxide. Moreover, you may use these mixtures and laminates.
- each organic layer forming the organic thin film layer of the organic EL device of the present invention is not particularly limited, but in general, if the film thickness is too thin, defects such as pinholes are generated, or conversely, it is too thick. Usually, the range of a few nm to 1 / m is preferred because a high applied voltage is required and efficiency is reduced.
- the above layer is formed by a wet method
- the above compound is dissolved in a soluble solvent.
- a known method such as a vacuum evaporation method is used. Power to form S
- the anode of the organic EL element plays a role of injecting holes into the hole injection Z transport layer or the light emitting layer, and it is effective to have a work function of 4.5 eV or more.
- the anode material tin-doped indium oxide alloy (ITO), tin oxide (NESA), gold, silver, platinum, copper and the like can be applied.
- the anode is a thin film formed from these electrode materials by vapor deposition or sputtering. Can be produced.
- the transmittance of the light emitted from the anode is greater than 10%.
- the sheet resistance of the anode is preferably several hundred ⁇ / mouth or less.
- the film thickness of the anode is a force depending on the material, and is usually selected in the range of 10 nm to l z m, preferably 10 to 200 nm.
- the cathode of the organic EL element plays a role of injecting electrons into the electron injection Z transport layer or the light emitting layer, and has a low work function (4 eV or less) metal, alloy, electrically conductive compound, and a mixture thereof.
- Specific examples of such an electrode material include sodium, sodium monopotassium alloy, magnesium, lithium, magnesium'silver alloy, aluminum Z aluminum oxide, aluminum'lithium alloy, indium, and rare earth metals.
- the cathode can be produced by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering.
- the transmittance of the cathode for light emission is preferably greater than 10%.
- the sheet resistance as a cathode is preferably several hundred ⁇ / mouth or less.
- the film thickness is usually 10 ⁇ to 1 ⁇ , preferably 50 to 2 OOnm.
- an organic EL element is produced on a light-transmitting substrate.
- the light-transmitting substrate is a substrate that supports the organic EL element, and is preferably a smooth substrate having a light transmittance in the visible region of 400 to 700 nm of 50% or more.
- a glass plate, a polymer plate, etc. are mentioned.
- the glass plate include soda lime glass, glass containing strontium, lead glass, aluminosilicate glass, borosilicate glass, norium borosilicate glass, and quartz.
- the polymer plate include polycarbonate, acrylic, polyethylene terephthalate, polyethersulfide, and polysulfone.
- the dew point was measured using a Michel dew point meter.
- Table 1 shows the relationship between water content and dew point temperature. From this relationship, the water content was determined from the measured dew point.
- Toluene was used as a solvent.
- the oxygen concentration in the solution was measured using a dissolved oxygen meter UC-12-SOL manufactured by Central Science Co., Ltd.
- the value [mg / L] obtained by the measurement was expressed in ppm by converting the specific gravity of toluene as 0.8669 (20.C).
- the measurement was performed using a trace moisture meter Ca-06 type manufactured by Diainsment.
- the method for measuring the oxygen concentration in the membrane was measured by secondary ion mass spectrometry (SIMS).
- SIMS secondary ion mass spectrometry
- the target organic thin film portion is specified, and the average value of the detected amount [count sZsec] of the range that includes 50% of the target thin film thickness from the center and the oxygen concentration
- the oxygen concentration was specified from the ratio of the average values of the detected amounts.
- Toluene was prepared in a glove box with an oxygen concentration of 0.6 ppm and a dew point of 70 ° C., after nitrogen bubbling, and then passed through a degasser (DEGASSER Multiplex U055 manufactured by IRSC Co., Ltd.). The water content and oxygen concentration of the resulting toluene were lppm 0.6 ppm, 7 fe.
- Compound A6 represented by the following formula was vacuum-dried and then introduced into a globebottom without exposure to the atmosphere, and dissolved in toluene prepared above so that compound A6 was 1 wt%.
- the water concentration and oxygen concentration of the prepared solution were lppm and 0.6 ppm, respectively.
- Compound A6 was produced by the method described in Japanese Patent Application No. 2003-417037.
- a 25 mm X 75 mm X 1.0 mm glass substrate was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- the substrate was transferred into a glove box with an oxygen concentration of 1 ppm and a dew point of 71 ° C (water content: 2 ppm), and a film was formed on the substrate using the solution prepared in Production Example 1 (1) by spin coating. did.
- beta was performed at a temperature of 115 ° C for 30 minutes using a hot plate in the glove box.
- the film thickness at this time was 50 nm.
- This substrate was set in the substrate holder of the vacuum evaporation system so that it was not exposed to the atmosphere, and a 10-nm thick tris (8 quinolinol) aluminum film (Alq film) was formed on the compound A6 film by vacuum evaporation. .
- the oxygen concentration in the film was measured by SIMS method.
- Figure 2 shows the measurement results. From this figure, the film deposited by the spin coat method was specified from 240 sec to 600 sec. The average values of carbon concentration and oxygen concentration were obtained from the average from 330 sec to 510 sec. In the membrane The oxygen concentration of was 9090ppm.
- a solution was prepared in the same manner as in Production Example 1 (1) except that the oxygen concentration and dew point in the glove box were 2 ppm and _70 ° C, respectively, and the water concentration and oxygen concentration of the solvent were 5 ppm and 2 ppm, respectively.
- the water concentration and oxygen concentration of the prepared solution were 5 PP m and 2 p P m, respectively.
- a membrane was produced in the same manner as in Production Example 1 (2) using the solution prepared in (1) above.
- the oxygen concentration in the film formed by the spin coating method was 151 Oppm.
- a solution was prepared in the same manner as in Production Example 1 (1) except that nitrogen publishing was also used without passing through the degasser.
- the water concentration and oxygen concentration of the solution at this time were 30 ppm and 20 ppm, respectively.
- a membrane was prepared in the same manner as in Production Example 1 (2) except that the oxygen concentration in the glove box was 35 ppm and the dew point was -40 ° C (water content: 130 ppm). .
- the oxygen concentration in the film formed by the spin coat method was 6080 ppm.
- a glass substrate with a 25 mm ⁇ 75 mm ⁇ l. 1 mm thick IT ⁇ transparent electrode (Zomatic Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- Polyethylene dioxythiophene / polystyrene sulfonic acid (PEDOT / PSS) used for the hole injection layer by spin coating is deposited on the substrate to a thickness of 1 OOnm, with an oxygen concentration of 0.6 ppm, dew point_ It was carried into a glove box at 70 ° C (water content: 3 PP m).
- the organic EL device of the present invention can be used for flat light emitters such as flat panel displays, copiers, printers, backlights for liquid crystal displays or light sources such as instruments, display boards, indicator lamps and the like.
Abstract
Description
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Priority Applications (2)
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US11/813,028 US20080100205A1 (en) | 2004-12-28 | 2005-12-06 | Organic Electroluminescent Device and Method for Manufacturing Same |
EP05842266A EP1841291A4 (en) | 2004-12-28 | 2005-12-26 | ORGANIC ELECTROLUMINESCENCE ELEMENT AND METHOD FOR THE PRODUCTION THEREOF |
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JP2004-381106 | 2004-12-28 | ||
JP2004381106A JP2006185864A (ja) | 2004-12-28 | 2004-12-28 | 有機エレクトロルミネッセンス素子及びその製造方法 |
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EP (1) | EP1841291A4 (ja) |
JP (1) | JP2006185864A (ja) |
KR (1) | KR20070089826A (ja) |
CN (1) | CN101088308A (ja) |
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Cited By (1)
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JP2010209248A (ja) * | 2009-03-11 | 2010-09-24 | Mitsubishi Chemicals Corp | 有機電界発光素子用組成物、有機電界発光素子、有機elディスプレイおよび有機el照明 |
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WO2007032270A1 (ja) * | 2005-09-13 | 2007-03-22 | Nec Corporation | 絶縁カバーおよびフィルム外装電気デバイス集合体 |
JP2008071682A (ja) * | 2006-09-15 | 2008-03-27 | Seiko Epson Corp | 有機エレクトロルミネッセンス装置の製造方法及び有機エレクトロルミネッセンス装置の製造装置 |
JP5417702B2 (ja) * | 2006-11-02 | 2014-02-19 | 三菱化学株式会社 | 有機電界蛍光発光素子、有機電界蛍光発光層塗布溶液、カラーディスプレイ表示装置 |
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- 2005-12-26 EP EP05842266A patent/EP1841291A4/en not_active Withdrawn
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- 2005-12-27 TW TW094146787A patent/TW200637424A/zh unknown
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Also Published As
Publication number | Publication date |
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EP1841291A4 (en) | 2009-06-03 |
JP2006185864A (ja) | 2006-07-13 |
CN101088308A (zh) | 2007-12-12 |
KR20070089826A (ko) | 2007-09-03 |
TW200637424A (en) | 2006-10-16 |
US20080100205A1 (en) | 2008-05-01 |
EP1841291A1 (en) | 2007-10-03 |
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