WO2004044088A1 - 有機エレクトロルミネッセンス素子用材料及びそれを用いた有機エレクトロルミネッセンス素子 - Google Patents
有機エレクトロルミネッセンス素子用材料及びそれを用いた有機エレクトロルミネッセンス素子 Download PDFInfo
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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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- 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
- 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
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/622—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing four rings, e.g. pyrene
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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
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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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
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
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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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- 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
- C09K2211/1014—Carbocyclic compounds bridged by heteroatoms, e.g. N, P, Si or B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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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
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/917—Electroluminescent
Definitions
- the present invention relates to a material for an organic electroluminescence device and an organic electroluminescence device using the same.
- the present invention is used as a light source for a flat illuminator of a wall-mounted television or a backlight of a display, and has a long life, a high luminous efficiency, and a material for an organic electroluminescence element capable of obtaining blue light with high color purity.
- the present invention relates to an organic electroluminescence device using the same. Background art
- Organic electroluminescent (EL) devices using organic substances are expected to be used as inexpensive, large-area, full-color display devices of the solid-state emission type, and many developments have been made.
- an EL device is composed of a light emitting layer and a pair of counter electrodes sandwiching the light emitting layer.
- light emission when an electric field is applied between both electrodes, electrons are injected from the cathode side and holes are injected from the anode side.
- the electrons recombine with holes in the light emitting layer to generate an excited state, and emit energy as light when the excited state returns to the ground state.
- JP-A-11-37882 a technique using a single monoanthracene compound as an organic light emitting material has been disclosed (JP-A-11-37882).
- Te is the technique smell, for example, at a current density of 1 6 5 mA / cm 2, 1 6 5 0 cd / m 2 brightness
- the efficiency is only 1 cd ZA, which is extremely low and not practical.
- a technique using a single bisanthracene compound as an organic light emitting material is disclosed (Japanese Patent Application Laid-Open No. 8-1200600). However, even with this technology, the efficiency is as low as about 1 to 3 cd / A, and improvement for practical use has been required.
- the present invention has been made in order to solve the above-mentioned problems, and has a long life, high luminous efficiency, and a material for an organic EL device capable of obtaining blue luminescence with high color purity and an organic EL device using the same. It is intended to provide.
- the present inventors have conducted intensive studies to develop a material for an organic EL device having the above-mentioned preferable properties and an organic EL device using the same, and as a result, any one of the following general formulas (I) to (IV) It has been found that the object can be achieved by using an aromatic amine derivative in which a chrysene structure and an amine structure represented by are linked. The present invention has been completed based on such findings.
- the present invention provides a material for an organic EL device comprising an aromatic amine derivative represented by any of the following general formulas (I) to (IV).
- -A 12 is independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1-50 carbon atoms, a substituted or unsubstituted aryl group having 5-50 carbon atoms, substituted or unsubstituted A cycloalkyl group having 3 to 50 nuclear carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 nuclear carbon atoms, a substituted or unsubstituted nuclear carbon number 5 Represents an arylamino group of up to 50, a substituted or unsubstituted alkylamino group having 1 to 20 carbon atoms, or a halogen atom, and m represents an integer of 0 to 5.
- a and A 12 May be the same or different, and may be linked to each other to form a saturated or unsaturated ring, and A 2 , A 3 and A 4 , A 5 and A 6 , A 7 and A 8 , A 9 and A 10 , and A 12 are concatenated Ku may form an unsaturated ring.
- a 4 is a hydrogen atom
- a 5 to A 8 in formula ([pi) Are not hydrogen atoms
- a 9 and A i are not both hydrogen atoms in the general formula (III), and in the general formula (IV)
- a 12 are both hydrogen atoms. Absent.
- Ri to R 42 represent each independently a hydrogen atom, a substituted or unsubstituted alkyl group having a carbon number of 1-2 0, a substituted or unsubstituted Ariru group with carbon number 6-20, or a Shiano group.
- Xi to X 3 each independently represent a substituted or unsubstituted ⁇ arylene group having a carbon number of 6-20.
- the present invention provides an organic EL device in which one or more organic thin film layers including at least a light emitting layer are sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers is the organic EL device.
- organic EL device containing the use material itself or as a component of a mixture, as well as the light emitting layer is intended to provide an organic EL device comprising the organic EL elements material 0.1 to 2 0 weight 0/0 .
- FIG. 1 is a view showing an NMR spectrum of the compound (1) which is a material for an organic EL device of the present invention obtained in Synthesis Example 1.
- FIG. 1 is a view showing an NMR spectrum of a compound (1) which is a material for an organic EL device of the present invention and obtained in Synthesis Example 2.
- FIG. 3 is a view showing an NMR spectrum of the compound (5) which is a material for an organic EL device of the present invention obtained in Synthesis Example 3;
- FIG. 4 is a diagram showing an NMR spectrum of the compound (6), which is a material for an organic EL device of the present invention, obtained in Synthesis Example 4.
- FIG. 5 is a view showing an NMR spectrum of the compound (8), which is a material for an organic EL device of the present invention and is obtained in Synthesis Example 5.
- FIG. 6 is a view showing an NMR spectrum of the compound (9) which is a material for an organic EL device of the present invention obtained in Synthesis Example 6.
- FIG. 7 is a view showing an NMR spectrum of the compound (10) which is a material for an organic EL device of the present invention obtained in Synthesis Example 7.
- FIG. 8 is a view showing an NMR spectrum of the compound (11) which is a material for an organic EL device of the present invention obtained in Synthesis Example 8.
- FIG. 9 is a view showing an NMR spectrum of the compound (1) which is a material for an organic EL device of the present invention obtained in Synthesis Example 9;
- FIG. 10 is a view showing an NMR spectrum of the compound (14) which is a material for an organic EL device of the present invention obtained in Synthesis Example 10;
- FIG. 11 is a diagram showing an NMR spectrum of the compound (19) which is a material for an organic EL device of the present invention obtained in Synthesis Example 11; BEST MODE FOR CARRYING OUT THE INVENTION
- the material for an organic EL device of the present invention comprises an aromatic amine derivative represented by any one of the above general formulas (I) to (IV).
- A! ⁇ A 12 are each independently a hydrogen atom, a substituted or unsubstituted number 1 5 0 (preferably 2 0 1 carbon atoms) carbon alkyl Le of Group, a substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms (preferably 5 to 20 nuclear carbon atoms), a substituted or unsubstituted nuclear carbon number of 3 to 50 (preferably nuclear)
- A the substituted or unsubstituted alkyl group to A 12, for example, a methyl group, Echiru group, a propyl group, Isopuropiru group, butyl group, sec- butyl group, tert one butyl group, a pentyl group, a hexyl group, Heptyl group, octyl group, stearyl group, 2-phenylisopropyl group, trichloromethyl group, trifluoromethyl group, benzyl group, monophenyloxybenzyl group, a, ⁇ -dimethylbenzyl group,, ⁇ - Examples include a methylphenylbenzyl group, an ⁇ , ⁇ -ditrifluoromethylbenzyl group, a triphenylmethyl group, an ⁇ -benzyloxybenzyl group and the like.
- A the substituted or unsubstituted Ariru group to? 12, for example, Fuweniru group, 2-methylphenyl group, 3-Mechirufuweniru group, 4 _ methylphenyl group, 4 one Echirufuweniru group, Bifuweniru group, 4-methyl Biff We sulfonyl Groups, 4-ethylbiphenyl, 4-cyclohexylbiphenyl, terphenyl, 3,5-dichlorophenyl, naphthyl, 5-methylnaphthyl, anthryl, pyrenyl and the like.
- A The substituted or unsubstituted cycloalkyl group to? 12, for example, consequent opening group, cyclobutyl group, cyclopentyl group, cyclohexyl group and the like cyclohexylene.
- A The substituted or unsubstituted alkoxyl group to A 12, for example, main butoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, Isobutoki sheet group, sec- butoxy group, tert- butoxy group, Examples include various pentyloxy groups and various hexyloxy groups.
- Examples of the substituted or unsubstituted aryloxy groups represented by A and A 12 include a phenoxy group, a trioxy group and a naphthyloxy group.
- A the substituted or unsubstituted Ariruamino group to A 12, for example, diphenyl, Eniruamino group, ditolylamino group, Jinafuchiruamino group, naphthylene Ruff We sulfonyl ⁇ amino group and the like.
- the substituted or unsubstituted alkylamino group ai to A 12 for example, dimethyl Chiruamino group, Jechiruamino group, Kishiruamino group and the like to di.
- Examples of the halogen atoms of A and A 12 include a fluorine atom, a chlorine atom, and a bromine atom.
- m represents an integer of 0 to 5, and preferably 0 to 2.
- a and -A 12 may be the same or different, and may be linked to each other to form a saturated or unsaturated ring.
- And A ,. , And 8 may be linked to each other to form a saturated or unsaturated ring.
- Ri to R 42 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having a carbon number of 1 to 0, a substituted or unsubstituted Ariru group having a carbon number of 6-2 0, or represents a Shiano group .
- substituted or unsubstituted alkyl group and aryl group of Ri to R 42 are the same as the above-mentioned At to A, 2 .
- Xi to X 3 each independently represent a substituted or unsubstituted ⁇ arylene group having a carbon number of 6-20.
- the substituted or unsubstituted Ariren group xi to X 3 for example, include Fuweniru, Bifuweniru, Tafuweniru, naphthalene, etc. divalent groups or or which is formed by connecting a plurality of these to each other are formed from the fluorene is Can be
- the compound represented by any one of the general formulas (I) to (IV) of the present invention has an association between the compounds because the chrysene structure and the amine structure substituted with a benzene ring having a substituent are connected. Is prevented, so the life is extended.
- it has strong fluorescence in the solid state, has excellent electroluminescence, and has a fluorescence quantum efficiency of 0.3 or more.
- it has excellent hole injection and hole transport properties from a metal electrode or an organic thin film layer, and excellent electron injection properties and electron transport properties from a metal electrode or an organic thin film layer. It is effectively used as a light emitting material for devices, and even if other hole transporting materials, electron transporting materials, or doping materials are used.
- the organic EL device of the present invention is a device in which one or more organic thin films are formed between an anode and a cathode.
- a light emitting layer is provided between an anode and a cathode.
- the light-emitting layer contains a light-emitting material, and may further contain a hole-injection material or an electron-injection material in order to transport holes injected from an anode or electrons injected from a cathode to the light-emitting material.
- the compounds of the general formulas (I) to (IV) have high light-emitting properties, and have excellent hole injection properties, hole transport properties, electron injection properties, and electron transport properties. Can be used for
- the light emitting layer preferably contains the material for an organic EL device of the present invention in an amount of 0.1 to 20% by weight, and more preferably 1 to 10% by weight.
- the material for an organic EL device of the present invention has extremely high fluorescence quantum efficiency, high hole transporting ability and electron transporting ability and can form a uniform thin film, light is emitted only from the luminescent material of the present invention. It is also possible to form layers.
- Multilayer organic EL devices include (anode / hole injection layer / light emitting layer / cathode), (positive electrode / light emitting layer / electron injection layer / cathode), (anode / hole injection layer / light emitting layer / electron injection) Layer / cathode).
- each of the hole injection layer, the light emitting layer, and the electron injection layer may have a layer structure of two layers or more.
- a layer for injecting holes from the electrode is a hole injection layer
- a layer for receiving holes from the hole injection layer and transporting holes to the light emitting layer is a hole transport layer.
- a layer that injects electrons from the electrode is called an electron injection layer
- a layer that receives electrons from the electron injection layer and transports electrons to the light emitting layer is called an electron transport layer.
- Examples of the light-emitting material or doping material that can be used in the light-emitting layer together with the compounds of the general formulas (I) to (IV) include, for example, anthracene, naphthalene, phenanthrene, pyrene, tetracene, coronene, chrysene, fluorescein, perylene, and phthalocyanine.
- the hole injecting material has the ability to transport holes, has the effect of injecting holes from the anode, has an excellent hole injecting effect on the light emitting layer or the light emitting material, and has a function of exciters generated in the light emitting layer.
- a compound that prevents migration to an electron injection layer or an electron injection material and has excellent ability to form a thin film is preferable.
- phthalocyanine derivatives naphthalocyanine derivatives, porphyrin derivatives, oxazoles, oxaziazoles, triazols, Imidazole, imidazolone, imidazolethione, virazoline, vilazolone, tetrahydroimidazole, oxazole, oxaziazol, hydrazone, acylhydrazone, polyarylalkane, stilbene, butadiene, benzidine triphenylamine, styrylamine diamine Examples include, but are not limited to, triphenylamine and the like, derivatives thereof, and polymer materials such as polybutylcarbazole, polysilane, and a conductive polymer.
- more effective hole injection materials are aromatic tertiary amine derivatives and phthalocyanine derivatives.
- aromatic tertiary amine derivatives include, for example, triphenylamine, tritolylamine, tolyldiphenylamine, N, N'-diphenyl-2-N, N '-(3-methylphenyl) 1-1, ⁇ —Biphenyl-1,4, diamine, N, N, N,, N ′-(4-methylphenyl) -1,1, -1, phenyl-1,4,4 ′ —diamine, N, N, N,, N, one (4 -1,2- ⁇ -biphenyl 4,4'-diamine, N, N'-diphenyl N, N'-dinaphthyl-1,1, -biphenyl-1,4, diamine, N, .N '-( Methylphenyl) 1
- phthalocyanine (p c ) derivatives include, for example, H 2 Pc, CuPc, Co Pc, Ni Pc ;, ZnPc, PdPc, FePc, MnPc, ClAlPc, ClGaPc, CIInPc, C1 SnPc, C " Phthalocyanine derivatives and naphthalocyanine derivatives such as SiPc, (HO) A1Pc, (HO) GaPc, V ⁇ Pc, Ti ⁇ Pc, Mo ⁇ Pc, GaPc-0-GaPc
- the present invention is not limited to these.
- the organic EL device of the present invention includes a layer containing these aromatic tertiary amine derivatives and / or a phthalocyanine conductor between the light emitting layer and the anode, for example, the hole transport layer or the hole injection layer. Preferably, it is formed.
- the electron injecting material has the ability to transport electrons, has the effect of injecting electrons from the cathode, has an excellent electron injecting effect on the light emitting layer or the light emitting material, and has a hole injecting layer for exciters generated in the light emitting layer.
- Compounds that prevent migration to the surface and have excellent thin film forming ability are preferred. Specifically, full-length lenone, anthraquinodimethane, diphenoquinone, thiopyrandioxide, oxazole, oxaziazole, triazole, imidazole, perylenetetracarboxylic acid, fluorenylidenemethane, anthraquinodimethane, anthrone, and the like. But are not limited to these.
- the sensitization can also be performed by adding an electron accepting substance to the hole injecting material and an electron donating substance to the electron injecting material.
- more effective electron injection materials are a metal complex compound and a nitrogen-containing five-membered ring derivative.
- Examples of the metal complex compound include 8-hydroxyquinolinatolithium, bis (8-hydroxyquinolinato) zinc, bis (8-hydroxyquinolinato) copper, bis (8-hydroxyquinolinato) manganese Tris (8-hydroxyquinolinato) aluminum, tris (2-methyl-8-hydroxyquinolinato) aluminum, tris (8-hydroxyquinolinato) gallium, bis (10-hydroxybenzo [h] ] Quinolinate) beryllium, bis (10-hydroxybenzo [h] quinolinate) zinc, bis (2-methyl-18-quinolinate) chloride gallium, bis (2-methyl-18-quinolinate) (0 —Cresolate) gallium, bis (2-methyl-8-quinolinato) (11 naphthotralate) aluminum, Bis (2-methyl-8-quinolinato) (2-naphtholate) Gallium and the like, but are not limited thereto.
- nitrogen-containing five-membered derivative examples include, for example, oxazolyl, thiazolyl, Sadazole, thiadiazole and triazole derivatives are preferred.
- oxazolyl thiazolyl
- Sadazole thiadiazole
- triazole derivatives are preferred.
- the organic EL device of the present invention at least one of a light-emitting material, a doping material, a hole-injection material, and an electron-injection material is contained in the light-emitting layer in addition to the compounds represented by the general formulas (I) to (IV). They may be contained in the same layer.
- a protective layer is provided on the surface of the device, or the entire device is protected with silicon oil, resin, or the like. It is also possible.
- a material having a work function of more than 4 eV is suitable, and carbon, aluminum, vanadium, iron, cono, nickel, tungsten, silver, gold, platinum, Metals such as palladium and their alloys, tin oxide and indium oxide used for the ITO substrate and the NESA substrate, and organic conductive resins such as polythiophene-polypyrrolyl are used.
- cathode Suitable conductive materials are those with a work function of less than 4 eV, such as magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, aluminum, and fluoride.
- Lithium and the like and their alloys are used, but are not limited thereto.
- Typical examples of the alloy include magnesium / silver, magnesium / indium, and lithium / aluminum, but are not limited thereto.
- the ratio of the alloy is controlled by the temperature, atmosphere, degree of vacuum, etc. of the deposition source, and is selected as an appropriate ratio.
- the anode and the cathode may be formed of two or more layers if necessary.
- the substrate is transparent.
- the transparent electrode is set so as to secure a predetermined translucency by a method such as vapor deposition or sputtering using the above conductive material.
- the electrode on the light emitting surface preferably has a light transmittance of 10% or more.
- the substrate is not limited as long as it has mechanical and thermal strengths and is transparent, and includes a glass substrate and a transparent resin film.
- Transparent resin films include polyethylene, ethylene monobutyl acetate copolymer, ethylene monobutyl alcohol copolymer, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polyvinyl alcohol, and polybutyral.
- Nylon Polyethylene terketone, Polysulfone, Polyethersulfone, Tetrafluoroethylene-Perfluoroalkylvinylether copolymer, Polybutylfluoride, Tetrafluoroethylene-ethylene copolymer, Tetrafluoroethylene Hexafluoropropylene copolymer, polychlorotrifluoroethylene, polyvinylidene fluoride, polyester, polycarbonate, polyurethane, polyimide, polyetherimide, polyimid , And polypropylene.
- Each layer of the organic EL device according to the present invention is formed by a dry film forming method such as vacuum evaporation, sputtering, plasma, ion plating, etc. Any of the wet film forming methods such as coating and flow coating can be applied.
- the film thickness is not particularly limited, but needs to be set to an appropriate film thickness. If the film thickness is too large, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. If the film thickness is too thin, pinholes and the like are generated, and sufficient light emission luminance cannot be obtained even when an electric field is applied.
- the normal thickness is suitably in the range of 5 nm to 10 nm, but is more preferably in the range of 10 nm to 0.2 wm.
- the material for forming each layer is dissolved or dispersed in an appropriate solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc. to form a thin film. good.
- an appropriate resin or additive may be used to improve film forming properties, prevent pinholes in the film, and the like.
- Resins that can be used include insulating resins such as polystyrene, polycarbonate, polyarylate, polyester, polyamide, polyurethane, polysulfone, polymethyl methacrylate, polymethyl acrylate, cellulose, and copolymers thereof.
- Examples include photoconductive resins such as poly (N-vinylcarbazole) and polysilane, and conductive resins such as polythiophene and polypyrrol.
- examples of the additive include an antioxidant, an ultraviolet absorber, and a plasticizer.
- the organic EL element material of the present invention for the organic thin film layer of the organic EL element, the organic EL element having a long life, high luminous efficiency, and capable of emitting blue light with high color purity can be obtained. Can be obtained. '
- the organic EL device of the present invention can be used for a flat light-emitting body such as a flat panel display of a wall-mounted television, a light source such as a copier, a pudding, a backlight of a liquid crystal display or instruments, a display board, a sign lamp, and the like. Further, the material of the present invention can be used not only in organic EL devices but also in fields such as electrophotographic photoreceptors, photoelectric conversion devices, solar cells, and image sensors. Next, the present invention will be described in more detail with reference to Examples. It is not limited in any way.
- the NMR spectrum was measured with a solvent of CDC 13 and R-900 (90 MHz) Fourier transform nuclear magnetic resonance apparatus manufactured by Hitachi, Ltd.
- a transparent electrode made of indium tin oxide having a thickness of 110 nm was provided on a glass substrate of 25 ⁇ 75 ⁇ 1.1 mm. After irradiating the glass substrate with ultraviolet rays and ozone for cleaning, the substrate was set in a vacuum evaporation apparatus.
- N,, N ' one bis [4- (diphenylamino) phenyl] one N ,, N'"diphenylbiphenyl2,4,4'diamine was added to 6 On m , then N, N, ⁇ ', ⁇ ' —tetrax (4-biphenyl) -1,4,4 '—benzidine to a thickness of 20 nm as a hole transport layer did . Then, 10,10, bis [1 ,,, 4 ', ⁇ '] terphenyl-2-yl 9,9, -bianthracenyl and the above compound (2) were simultaneously steamed at a weight ratio of 40: 2. Then, a light emitting layer having a thickness of 40 nm was formed.
- An organic EL device was fabricated in the same manner as in Example 1, except that the compound (5) was used instead of the compound (2).
- the obtained organic EL device was tested under an electricity application, a voltage 6. 5V, at a current density of 1 OMA / cm 2, a luminance of emitted light of 5 96 cd / m 2 (light emission maximum wavelength: 4 6 3 nm) was gotten.
- a continuous energization test was performed in the same manner as in Example 1, the half life was 3880 hours.
- An organic EL device was fabricated in the same manner as in Example 1, except that the compound (11) was used instead of the compound (1).
- Example 1 an organic EL device was produced using 6,12-bis (diphenylamino) chrysene instead of the compound (2).
- a current test was performed on the obtained organic EL device. At a voltage of 6.2 V and a current density of 1 OmA / cm 2 , a blue emission of 311 cd / m 2 (maximum emission wavelength: 451 nm) was obtained. Obtained. Further, when a continuous energization test was performed in the same manner as in Example 1, the half-life was as short as 1000 hours. Industrial applicability
- An organic EL device using the organic EL device material of the present invention as a light-emitting material can obtain practically sufficient light emission luminance at a low applied voltage, has high luminous efficiency, is not easily deteriorated even after long use, and has a long life. .
Abstract
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60333214T DE60333214D1 (de) | 2002-11-12 | 2003-10-20 | Stoff für organische elektrolumineszenzvorrichtung und darauf basierende organische elektrolumineszenzvorrichtung |
AT03754188T ATE472585T1 (de) | 2002-11-12 | 2003-10-20 | Stoff für organische elektrolumineszenzvorrichtung und darauf basierende organische elektrolumineszenzvorrichtung |
US10/532,794 US20060052641A1 (en) | 2002-11-12 | 2003-10-20 | Material for organic electroluminescent device and organic electroluminescent device using same |
JP2004551191A JP4205059B2 (ja) | 2002-11-12 | 2003-10-20 | 有機エレクトロルミネッセンス素子用材料及びそれを用いた有機エレクトロルミネッセンス素子 |
EP03754188A EP1561794B1 (en) | 2002-11-12 | 2003-10-20 | Material for organic electroluminescent device and organic electroluminescent device using same |
US11/711,655 US20070155991A1 (en) | 2002-11-12 | 2007-02-28 | Material for organic electroluminescent device and organic electroluminescent device using same |
US12/318,859 US8178218B2 (en) | 2002-11-12 | 2009-01-09 | Material for organic electroluminescent device and organic electroluminescent device using same |
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US11/711,655 Continuation US20070155991A1 (en) | 2002-11-12 | 2007-02-28 | Material for organic electroluminescent device and organic electroluminescent device using same |
US12/318,859 Continuation US8178218B2 (en) | 2002-11-12 | 2009-01-09 | Material for organic electroluminescent device and organic electroluminescent device using same |
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EP (1) | EP1561794B1 (ja) |
JP (1) | JP4205059B2 (ja) |
KR (1) | KR101031719B1 (ja) |
CN (2) | CN100343359C (ja) |
AT (1) | ATE472585T1 (ja) |
DE (1) | DE60333214D1 (ja) |
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US20090195149A1 (en) | 2009-08-06 |
JP4205059B2 (ja) | 2009-01-07 |
ATE472585T1 (de) | 2010-07-15 |
EP1561794A1 (en) | 2005-08-10 |
CN100343359C (zh) | 2007-10-17 |
CN1978586A (zh) | 2007-06-13 |
DE60333214D1 (de) | 2010-08-12 |
KR20050086518A (ko) | 2005-08-30 |
KR101031719B1 (ko) | 2011-04-29 |
US8178218B2 (en) | 2012-05-15 |
TW200420709A (en) | 2004-10-16 |
CN1711334A (zh) | 2005-12-21 |
EP1561794A4 (en) | 2008-08-20 |
US20070155991A1 (en) | 2007-07-05 |
TWI327159B (ja) | 2010-07-11 |
JPWO2004044088A1 (ja) | 2006-03-09 |
US20060052641A1 (en) | 2006-03-09 |
EP1561794B1 (en) | 2010-06-30 |
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