WO2004067674A1 - 有機発光素子材料 - Google Patents
有機発光素子材料 Download PDFInfo
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- WO2004067674A1 WO2004067674A1 PCT/JP2004/000645 JP2004000645W WO2004067674A1 WO 2004067674 A1 WO2004067674 A1 WO 2004067674A1 JP 2004000645 W JP2004000645 W JP 2004000645W WO 2004067674 A1 WO2004067674 A1 WO 2004067674A1
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- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/52—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton
- C07C229/54—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton with amino and carboxyl groups bound to carbon atoms of the same non-condensed six-membered aromatic ring
- C07C229/62—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton with amino and carboxyl groups bound to carbon atoms of the same non-condensed six-membered aromatic ring with amino groups and at least two carboxyl groups bound to carbon atoms of the same six-membered aromatic ring
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- 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
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- 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
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
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- 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
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1044—Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
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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
- H10K85/10—Organic polymers or oligomers
- H10K85/141—Organic polymers or oligomers comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE
- H10K85/146—Organic polymers or oligomers comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE poly N-vinylcarbazol; Derivatives thereof
Definitions
- the present invention relates to an organic light emitting device material, a fluorescent compound used for the material, and an organic light emitting device.
- a light emitting layer doped with a quinataridone derivative can be used as an EL device that emits green light, but it is desired that the quincriridone derivative improve various characteristics.
- N, N, -dimethylquinacridone disclosed in Japanese Patent Application Laid-Open No. 2000-315579 requires a high temperature for vapor deposition, and It is difficult to form a uniform evaporation layer.
- N, N'-dimethylquinatalidone does not have sufficient solubility in organic solvents, and its compatibility with polymers also needs to be improved. Disclosure of the invention
- organic light emission is excellent in color purity as red, capable of emitting light with high luminance, capable of being stably deposited at a lower temperature, and forming a uniform light emitting layer. It is to provide device materials.
- the organic light emitting material has excellent color purity as green, can emit light with high luminance, can be stably deposited at a lower temperature, and can form a uniform light emitting layer. It is to provide a device material.
- Another object of the present invention is to provide a novel fluorescent compound for use in the above organic light emitting device material.
- An organic light-emitting device material containing at least one kind of fluorescent compound in which at least a part of the fluorescent spectrum exists in a wavelength region of 600 to 700 nm An organic light emitting device material in which the fluorescent compound is a p-phenyl derivative represented by the following general formula (1):
- R 2 and R 3 independently represent a hydrogen atom, an alkyl group, an alkoxy group or a benzyl group, and R 5 represents an alkyl group.
- R 2 and R independently represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group, and R 4 represents an aryl group which may be substituted with an alkyl group or an alkoxy group. Represents a bonded methylene group.
- an organic light-emitting element capable of emitting red and / or green light and a fluorescent compound for use therein.
- the fluorescent compound of the present invention can be deposited at a lower temperature than conventional products, and can provide an organic light-emitting device capable of emitting good red and / or green light.
- the fluorescent compound of the present invention can also be used as an organic light emitting device capable of emitting red and / or green light depending on the application method.
- the fluorescent compound of the present invention can be suitably used for a full-color or area-color display device.
- FIG. 1 is an IR absorption spectrum of p-phenylenediamine derivative 4 obtained in Synthesis Example 1.
- FIG. 2 is an NMR spectrum of the p-phenylenediamine derivative 4 obtained in Synthesis Example 1.
- FIG. 3 is a fluorescence spectrum of p-phenylenediamine derivative 4 obtained in Synthesis Example 1.
- FIG. 4 is an IR absorption spectrum of quinacridone derivative 7 obtained in Synthesis Example 1.
- FIG. 5 is an NMR spectrum of the quinatalidone derivative 7 obtained in Synthesis Example 1.
- FIG. 6 is a fluorescence spectrum of the quinacridone derivative 7 obtained in Synthesis Example 1.
- FIG. 7 is a fluorescence spectrum of the p_phenylenediamine derivative obtained in Synthesis Example 2.
- FIG. 8 is a fluorescent sautylenediamine derivative obtained in Synthesis Example 3.
- FIG. 9 is a fluorescence spectrum of the p-phenylenediamine derivative obtained in Synthesis Example 4.
- FIG. 10 is a fluorescence spectrum of the p-phenylenediamine derivative obtained in Synthesis Example 5.
- the red light emitting element material of the present invention is a p-phenylene diamine derivative represented by the above general formula (1).
- R 2 and R 3 independently represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group, and R 5 represents an alkyl group.
- ⁇ ⁇ Or alkyl group R 5 can take is preferably carbon number (C):! Represents an alkyl group of 1-8.
- the alkoxy group which can be taken is preferably an alkoxy group having carbon number (C):! It is a group.
- the aryl group which can be taken is preferably an aryl group having 6 to 12 carbon atoms (C).
- the alkyl group of 1 ⁇ and Z or R 3 preferably represents an alkyl group having carbon number (C):! To 8, and more preferably a branched alkyl group.
- Alkyl groups are preferred, and tertiary alkyl groups are most preferred.
- a particularly preferred example of the tertiary alkyl group is a tertiary alkyl group having 4 to 8 carbon atoms, and examples thereof include a tert-butyl group and a tert-amyl group.
- the linear alkyl group is preferably an alkyl group having a carbon number of 5 to 10 which can take a range of 1 to 10 carbon atoms, and examples thereof include an n-heptyl group and an n-octyl group. .
- the alkoxy group can have a range of 1 to 5 carbon atoms, but preferably has 1 to 3 carbon atoms, and examples thereof include a methoxy group and an ethoxy group.
- the aryl group has 6 to 10 carbon atoms, and examples thereof include a phenyl group.
- R 5 is preferably linear lower alkyl (1 to 5 carbon atoms), and examples thereof include a methyl group and an ethyl group.
- Alkyl groups take the ⁇ or R 5, alkoxy or Ariru group may be substituted with one or more substituents.
- the p-phenylenediamine derivative represented by the general formula (1) is converted to 1'4-cyclo Xadione-1,2,5-dicarboxylate and anilines can be obtained by dehydration after dehydration reaction as shown in the following formula. Purification of the target compound can be performed by recrystallization or the like according to a conventional method. Hereinafter, the dehydration step and the dehydrogenation step will be described.
- R 2 and R 3 independently represent a hydrogen atom, an alkyl group, an alkoxy group or a aryl group, and R 5 represents an alkyl group.
- R 1 R 2 and R 3 and R 5 in the formula have the same meaning as in the dehydration step.
- 1,4-cyclohexadione-1,5-dicarboxylate is reacted with anilines in the presence of a dehydrating agent.
- 1,4-cyclohexadione-1,2-dicarboxylate examples include dimethyl ester and getyl ester.
- the charge ratio of adilines to 1 mol of 1,4-cyclohexadione-1,5-dicarboxylate can be appropriately selected, but 1 to 6 mo 1 of adiphosphine is used for 1 mol of cyclohexadione. It is preferable to use 2 to 2.5 mol.
- the solvent used in the dehydration step is not particularly limited, and examples thereof include acetic acid, ethyl alcohol, and IPA as an acid catalyst. These solvents can be used alone or in combination of two or more. Among these, acid catalysts and ethyl alcohol Mixed solvents are preferred.
- the temperature of the dehydration reaction can be appropriately selected, but is preferably from 100 to 140 ° C, more preferably from 110 to 120 ° C.
- the time of the dehydration reaction depends on the reaction temperature, but is preferably 1 to 12 hours, more preferably 2 to 6 hours.
- an inorganic or organic dehydrogenating agent can be used, and examples thereof include concentrated sulfuric acid, 95% sulfuric acid, p-toluenesulfonic acid, and phosphoric acid. Among them, it is preferable to use concentrated sulfuric acid.
- the amount of the dehydrogenating agent can be appropriately selected, but it is preferably added in an amount of 0.5 to 10 parts by weight, more preferably 1 to 2 parts by weight, based on 100 parts by weight of the reaction material.
- the solvent used in the dehydrogenation step can be appropriately selected, and examples thereof include o-dichlorobenzene and cyclohexanone. Among these, it is preferable to use o-dichlorobenzene.
- the temperature of the dehydrogenation reaction is preferably selected from 100 to 180 ° C, more preferably from 140 to 170 ° C, depending on the reaction raw materials.
- the time of the dehydrogenation reaction is preferably 1 to 6 hours, more preferably 2 to 4 hours.
- the p-phenylenediamine derivative obtained by the above-mentioned dehydration reaction and dehydrogenation reaction is a fluorescent compound containing a fluorescent component in the wavelength range of 600 to 700 nm.
- a p-phenylenediamine derivative in which the fluorescence maximum of the compound itself exists in a wavelength range of about 600 nm to about 630 nm is preferable as a material for an organic light-emitting device emitting red light.
- the green light emitting device material of the present invention can be made of a quinatalidone derivative represented by the general formula (2).
- Ri, R 2 ⁇ Pi 1 3 independently represents a hydrogen atom, an alkyl group, an alkoxy group or ⁇ re Ichiru group, R 4 represents an alkylene group Ariru group is bonded.
- Preferred substituents of the quinatalidone derivative represented by the general formula (2) are described below.
- the alkyl group of R 3 preferably represents an alkyl group having carbon atoms (C):! To 8, more preferably a branched alkyl group rather than a straight-chain alkyl group.
- tertiary alkyl groups are most preferred.
- Particularly preferred examples of the tertiary alkyl group are tertiary alkyl groups having 4 to 8 carbon atoms, such as a tert-butyl group and a tert-amyl group.
- the linear alkyl group is preferably an alkyl group having a carbon number of 5 to 10 which can take a range of 1 to 10 carbon atoms, and is exemplified by an n-heptyl group and an n-octyl group. it can.
- the alkoxy group can have a range of 1 to 5 carbon atoms, but preferably has 1 to 3 carbon atoms, and examples thereof include a methoxy group and an ethoxy group.
- the aryl group has 6 to 10 carbon atoms, and examples thereof include a phenyl group.
- R 4 is an aralkyl group (aryl alkyl group), the aryl component has 1 to 20 carbon atoms, and a phenyl, naphthyl or Anthryl groups are preferred.
- the alkylene component of the aralkyl group is a lower (C.sub.1-4) alkylene group, preferably a methylene group. Particularly preferably, the total carbon number of the aralkyl group is from 7 to 11.
- R 4 examples include benzyl, o_tolylmethylene, m-tolylmethylene, p-tolylmethylene, ⁇ -naphthylmethylene, and mono-naphthyl Examples include a methylene group, 91-anthrylmethylene group, and 9-anthrylethylene group.
- the quinatalidone derivative of the present invention can be obtained by using the compound of the above general formula (1) as a starting material and subjecting it to N-alkyl cyclization and ring-closing steps.
- a representative alkylating agent is an alkyl halide, and a halide R 4 X (where R 4 has the same meaning as R 4 above, and X represents a halogen atom, preferably chlorine or bromine. ) Is preferred. That is, R 4 Cl or R 4 Br is preferred.
- R 4 Cl or R 4 Br is preferred.
- alkynyl salt usable in the present invention include benzyl chloride, benzyl bromide, ⁇ -chloro-o-xylene, ⁇ -chloro-m-xylene, and chloro-p _
- the amount of the N-alkylic agent to be used may be stoichiometrically excess with respect to the raw material to be alkylated. Usually, it is preferably added in an amount of 1 to 8 mol per 1 mol of the raw material, more preferably 4 to 7 mol. .
- a polar solvent is preferable, and examples thereof include N, N-dimethylformamide (DMF) and N, N-dimethylacetamide (DMAC). Among them, N, N-dimethylformamide is preferred.
- the temperature of the N-alkylidani reaction can be appropriately selected, but is preferably from 120 to 180 ° C, more preferably from 150 to 170 ° C.
- the duration of the N-alkyl reaction depends on the reaction temperature, but is preferably 6 to 36 hours, more preferably 18 to 24 hours.
- Examples of the condensing agent used for the ring closure reaction include p-toluenesulfonic acid monohydrate, dodecylbenzenesulfonic acid and the like. Of these, p-toluenesulfonic acid monohydrate is preferred.
- the amount of the condensing agent to be used is preferably 2 to 8 mol, more preferably 5 to 7 mol, per 1 mol of the raw material obtained in the N-alkylation step.
- Examples of the solvent used in the ring closing step include o-dichlorobenzene, dinitrobenzene, and the like. Of these, o-dichlorobenzene is preferred.
- the temperature of the ring closure reaction can be usually selected in the range of 120 to 180 ° C, preferably 150 to 170 ° C.
- the time of the ring closure reaction depends on the reaction temperature, but is usually 6 to 36 hours, preferably 18 to 24 hours.
- the target quinacridone derivative can be purified by a recrystallization method from a solvent such as 1,4-dioxane.
- the quinacridone derivative obtained by the N-alkylation and the ring closure reaction is a fluorescent compound having a fluorescent component in a wavelength range of 500 to 600 nm.
- a quinacridone derivative having a fluorescence maximum in DMAC in the wavelength range of about 530 nm to about 560 nm is preferable as a green light-emitting organic light-emitting device material.
- H 2 NC 6 H 4 C (CH 3 ) 3 25.0 g (1.7 x 10 11 mo 1) is placed in a 100-m 1 three-necked flask, and C 1 () H 12 0 6 13.6 g (6. 0 X 10- 2 mo 1 ) was added was added further acetic, ethyl alcohol each 250 ml.
- the mixture was heated and stirred at 115 ° C using a silicone oil bath and reacted for 4 hours. After the completion of the reaction, the resultant was cooled to room temperature, and the product was filtered using a glass filter.
- the solid remaining in the filter was washed with methyl alcohol, ethyl acetate, and petroleum ether in that order, and then dried under vacuum to obtain a target intermediate 3 as an orange powder (29.5 g).
- the chemical structure was confirmed by IR absorption spectrum and NMR spectrum.
- the solid obtained was dissolved in toluene, recrystallized, filtered using a glass filter, and the solid remaining in the filter was washed with methyl alcohol and petroleum ether in that order, and then dried in vacuo. I let you.
- the target product 4 was obtained as a red powder having a melting point of 260 ° C. Yield 13.1 g.
- the IR chart is as shown in FIG.
- the NMR chart is as shown in FIG.
- the fluorescent spectrum is as shown in FIG.
- the obtained solid was washed with methyl alcohol and petroleum ether in that order, and then dried under vacuum.
- Intermediate 6 was obtained as a reddish brown powder. Yield 3.6 g.
- Synthesis Example 1 a corresponding p_-furenediamine derivative was obtained in the same manner as in Synthesis Example 1 except that anilines were changed as described in Table 2.
- the N-alkyl reaction was carried out in exactly the same manner as in Synthesis Example 1 except that the p-phenylenediamine derivative obtained in Synthesis Example 2 above was used as a raw material, and the resulting N-alkylation reaction product was formed. The product was subjected to a ring closure reaction to give a quinatalidone derivative. The melting point was 3.56 ° C.
- the N-alkylation reaction was carried out in the same manner as in Synthesis Example 1 except that the p-phenylenediamine derivative obtained in Synthesis Examples 3 to 5 above was used as a raw material.
- the quinatalidone derivative can be obtained by subjecting the killing reaction product to a ring closure reaction. (Organic light emitting device)
- the organic light-emitting device of the present invention is an organic light-emitting device having one or more organic layers between a pair of electrodes, wherein at least one of the one or more organic layers contains the organic light-emitting device material.
- the organic light-emitting device may be a fluorescent compound in which at least a part of the fluorescent spectrum exists in a wavelength region of 600 to 700 nm, or at least a part of the fluorescent spectrum is 500 to 600.
- the fluorescent compound includes a fluorescent compound existing in a wavelength region of nm, and the fluorescent compound is at least one selected from compounds represented by any of the general formulas (1) and (2). preferable.
- As the organic light-emitting device a group of substituents preferable as the organic light-emitting device material represented by any one of the general formulas (1) and (2) is preferable.
- the organic layer containing the organic light emitting device material may be any of an electron injection layer, an electron transport layer, a hole injection layer, a hole transport layer, and a light emitting layer. It may be a layer provided. Among them, a mode utilizing light emission from the fluorescent compound, that is, a mode in which the organic light emitting device material is contained in at least a light emitting layer, and a mode in which the fluorescent compound is used as a charge transport material, It is preferable that the organic light-emitting device material contains at least the charge transport layer.
- the organic light-emitting device of the present invention is not particularly limited in terms of system, driving method, use form, and the like.
- a typical driving method includes an organic EL (electroluminescence) device.
- the method for forming the organic layer containing the organic light emitting material is not particularly limited, and methods such as resistance heating evaporation, electron beam, sputtering, molecular lamination, coating, inkjet, and printing can be used. . It is preferable that the organic layer is formed by a vapor deposition method or a coating method from the viewpoint of characteristics and production, and in particular, from the viewpoint of avoiding thermal decomposition during the vapor deposition, the organic layer is formed by a coating method. preferable.
- the organic layer is formed by a coating method, the organic light emitting device material is dissolved and Z or dispersed in an organic solvent to prepare a coating solution, which is applied to the electrode surface or a predetermined layer.
- a luster component is added together with the organic light emitting device material.
- the resin component include polyvinyl chloride, polycarbonate, polystyrene, polymethyl methacrylate, polybutyl methacrylate, polyestenole, polysnoreon, polyphenylene oxide, polybutadiene, poly (N-biercarpazole), and hydrocarbon.
- the organic light emitting device of the present invention may have at least a light emitting layer between a pair of electrodes, and may have a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, a protective layer, and the like in addition to the light emitting layer.
- Each of these layers may have other functions.
- Various materials can be used for forming each layer.
- the organic material may be contained in any of the layers, but is preferably contained in the light emitting layer and the Z or charge transport layer.
- the anode of the pair of electrodes supplies holes to a hole injection layer, a hole transport layer, a light emitting layer, and the like, and is formed of a metal, an alloy, a metal oxide, an electrically conductive compound, or a mixture thereof.
- Objects and the like can be used.
- the material has a work function of 4 eV or more.
- Specific examples include conductive metal oxides such as tin oxide, zinc oxide, oxidized zinc oxide and indium tin oxide (ITO); metals such as gold, silver, chromium and nickel; And organic conductive materials such as polyaniline, polythiophene and polypyrrole, and laminates of these with ITO: and the like.
- the thickness of the anode can be appropriately selected depending on the material, but is usually preferably in the range of 10 nm to 5 ⁇ m, more preferably 50 nm to 1 ⁇ , and still more preferably 100 nm to 500 nm.
- a layer formed on a soda lime glass, an alkali-free glass, a transparent resin substrate or the like is usually used.
- glass it is preferable to use non-alkali glass to reduce ions eluted from the glass.
- a barrier coat such as silica must be used. It is preferable to use those that have been subjected to the treatment.
- the thickness of the substrate is not particularly limited as long as it is sufficient to maintain the mechanical strength. When glass is used, the thickness is usually 0.2 mm or more, preferably 0.7 mm or more.
- anode depending on the material.
- an electron beam method a sputtering method, a resistance heating evaporation method, a chemical reaction method (such as a sol-gel method), and a dispersion of indium tin oxide are used.
- the film is formed by a method such as application of an object.
- a process such as washing after forming the anode, the driving voltage of the organic light emitting device can be reduced and the luminous efficiency can be increased.
- a UV-zone treatment and a plasma treatment are effective.
- the cathode of the pair of electrodes supplies electrons to an electron injection layer, an electron transport layer, a light-emitting layer, and the like, and adheres to a negative electrode and an adjacent layer such as the electron injection layer, the electron transport layer, and the light-emitting layer. And the ionization potential and stability.
- a material for the cathode a metal, an alloy, a metal halide, a metal oxide, an electrically conductive compound or a mixture thereof can be used.
- alkali metals eg, Li, Na, K, etc.
- alkaline earth metals eg, Mg, Ca, etc.
- examples thereof include sodium-potassium alloy or a mixed metal thereof, lithium-aluminum alloy or a mixed metal thereof, magnesium silver alloy or a mixed metal thereof, and rare earth metals such as indium and ittibidium.
- the material has a work function of 4 eV or less, and more preferably, aluminum, a lithium-aluminum alloy or a mixed metal thereof, a magnesium-silver alloy or a mixed metal thereof.
- the cathode may have not only a single-layer structure of the compound and the mixture, but also a stacked structure including the compound and the mixture.
- the thickness of the cathode can be appropriately selected depending on the material, but is usually preferably in the range of 10 nm to 5 ⁇ , more preferably 50 nm to l // m, and still more preferably 100 ⁇ ⁇ ! ⁇ 1 m.
- a method such as an electron beam method, a sputtering method, a resistance heating evaporation method, or a coating method is used for manufacturing the cathode, and a metal can be evaporated alone or two or more components can be evaporated simultaneously.
- an alloy electrode can be formed by vapor-depositing a plurality of metals at the same time, or a previously adjusted alloy may be vapor-deposited.
- the sheet resistance of the anode and the cathode is preferably low, and is preferably several hundreds ⁇ / port or less.
- the light emitting layer has a function capable of injecting holes from an anode or a hole injection layer or a hole transport layer when an electric field is applied, and also capable of injecting electrons from a cathode or an electron injection layer or an electron transport layer.
- the layer has a function of transferring injected charges and a function of providing a field for recombination of holes and electrons to emit light.
- the light emitting material contained in the light emitting layer is preferably the organic light emitting device material of the present invention.
- the light emitting material examples include benzoxazole derivatives, benzoimidazole derivatives, benzothiazole derivatives, styrylbenzene derivatives, polyphenyl derivatives, diphenylbutadiene derivatives, tetraphenylbutadiene derivatives, naphthalimide derivatives, coumarin derivatives, Perylene derivative, perinone derivative, oxadiazole derivative, aldazine derivative, bilaridine derivative, cyclopentadiene derivative, bisstyrylanthracene derivative, pyro-open pyridine derivative, thiadiazolo pyridine derivative, cyclopentadiene derivative, styrylamine derivative, aromatic dimethylidin compound, 8 Metal complexes of quinolinol derivatives ⁇ Various metal complexes such as rare earth complexes, polythiophene, polyphenylene, polyphenylene Binire polymeric compounds such emissions, organic silane derivatives, and the like. These may be used alone
- the thickness of the light emitting layer is not particularly limited, but is usually 1! ! ! ! ! ⁇ ! ! ! Is preferably in the range of 5 nm to 1 ⁇ , more preferably 10 ⁇ ! 5500 nm.
- the method of forming the light-emitting layer is not particularly limited, but includes resistance heating evaporation, electron beam, sputtering, molecular lamination, coating (such as spin coating, casting, and dip coating), inkjet, and the like. Methods such as the LB method and the printing method are used, and preferably the resistance heating evaporation and the coating method.
- a resin component may be used at the time of preparing a coating solution, and the same resin component as described above can be used.
- the organic light emitting device of the present invention may have a hole injection layer and / or a hole transport layer.
- the hole injection layer and the materials contained in the hole injection layer include a function of injecting holes from an anode, a function of transporting holes, and a device for blocking electrons injected from a cathode. Any device having any of the functions can be used. Specific examples thereof include carbazole derivatives, triazole derivatives, oxazole derivatives, oxazine diazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazopine derivatives, phenylenediamine derivatives, arylamine derivatives, and amino-substituted derivatives.
- Con derivatives styryl anthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidin compounds, porphyrin compounds, polysilane compounds, poly (N —Vinylcarbazole) derivatives, aniline-based copolymers, thiophene oligomers, conductive polymer oligomers such as polythiophene, organic silane derivatives, and the compounds of the present invention. I can do it. These may be used alone or in combination of two or more.
- each of the hole injection layer and the hole transport layer is not particularly limited.
- the force is preferably in the range of usually 1 nm to 5 ⁇ , more preferably 5 nm to 1 ⁇ m, More preferably, 10 nn! 5500 nm.
- Each of the hole injection layer and the hole transport layer may have a single layer structure composed of one or more of the above-described materials, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions. Is also good.
- a vacuum deposition method As a method for forming each of the hole injection layer and the hole transport layer, a vacuum deposition method, an LB method, a method in which the hole injection and transport agent is dissolved or dispersed in a solvent and applied (spin coating method, Casting, dip coating, etc.), inkjet, and printing.
- a resin component may be used at the time of preparing a coating solution, and the resin component may be used at the time of forming the above-mentioned organic layer. The same resin components as possible can be used.
- the organic light emitting device of the present invention may have an electron injection layer and / or an electron transport layer.
- the materials contained in the electron injection layer and the electron transport layer each have a function of injecting electrons from a cathode, a function of transporting electrons, and a function of blocking holes injected from an anode. Should be fine.
- Specific examples thereof include a triazole derivative, an oxazole derivative, an oxadiazole derivative, a fluorenone derivative, an enthraquinodimethane derivative, an anthrone derivative, a diphenylquinone derivative, a thiopyrandioxide derivative, a carbodiimide derivative, and a fluorenylidenemethane derivative.
- Metal complexes of heterocyclic tetracarboxylic anhydrides such as distyryl virazine derivatives and naphthalene perylene, phthalocyanine derivatives, and 8-quinolinol derivatives ⁇ metal phthalocyanines, benzoxazoles and benzothiazoles as ligands
- Metal complexes represented by the above-mentioned metal complexes, organic silane derivatives, and the organic light-emitting device material of the present invention One of these materials may be used alone, or two or more thereof may be used in combination.
- each of the electron injection layer and the electron transport layer is not particularly limited, but is usually preferably in the range of 1 nm to 5 ⁇ um, more preferably 5 nn! 11 ⁇ m, more preferably 10 nm to 500 nm.
- Each of the electron injection layer and the electron transport layer may have a single-layer structure composed of one or more of the above-described materials, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions. ,.
- Examples of the method for forming the electron injection layer and the electron transport layer include a vacuum deposition method and an LB method, and a method in which the electron injection and transport agent is dissolved or dispersed in a solvent and applied (spin coating, casting, dip coating).
- a resin component may be used at the time of preparing a coating solution, and a resin component which can be used at the time of forming the above-mentioned organic layer as the resin component Can be used.
- the organic light emitting device of the present invention may have a protective layer.
- the material contained in the protective layer may be any material as long as it has a function of preventing a substance that promotes element deterioration such as moisture and oxygen from entering the element.
- Metal fluorides such as polyethylene, polypropylene, polymethyl methacrylate, polyimide, polyurea, polytetrafluoroethylene, polychlorotriphenylene ethylene, polydichlorodifluoroethylene, ethylene trichloride and ethylene dichloride.
- Polymer copolymer obtained by copolymerizing a monomer mixture containing tetrafluoroethylene and at least one comonomer, fluorine-containing copolymer having a cyclic structure in the copolymer main chain, water absorption of 1% Water-absorbing substance, moisture-absorbing substance with water absorption of 0.1% or less Quality and the like.
- a vacuum deposition method a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma polymerization method ( High frequency excitation ion plating method), plasma CVD method, laser CVD method, thermal CVD method, gas source CVD method, coating method and printing method can be applied.
- a vacuum deposition method a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma polymerization method ( High frequency excitation ion plating method), plasma CVD method, laser CVD method, thermal CVD method, gas source CVD method, coating method and printing method can be applied.
- the following green light emitting device was produced.
- An IT ⁇ substrate (50 ⁇ 50 mm, manufactured by Sanyo Vacuum Industry Co., Ltd.) was ultrasonically cleaned with acetone for 10 minutes, then ultrasonically cleaned with 2-propanol for 10 minutes, and dried with a nitrogen stream. After that, the ITO substrate was cleaned by irradiating UV for 5 minutes with a photo surface processor (25.4 nm wavelength, manufactured by Sen Special Light Source Co., Ltd.).
- the washed I TO substrate was set in a vacuum deposition apparatus (Daya vacuum Giken (Ltd.) USD-The M2-46 type), deposition 4 X 10- 6 torr below under reduced pressure alpha-NPD layer to a thickness of 45 nm
- a green light emitting device was manufactured by vapor deposition to a thickness of nm.
- the luminance and chromaticity of this light-emitting device were measured while gradually increasing the voltage using BM-7 Fast manufactured by Topcon Corporation.
- BM-7 Fast manufactured by Topcon Corporation As a result, at a voltage of 13 V and a current of 50 mA, a result of a luminance of 53,000 Cd / m 2 , a chromaticity X of 0.31 and a chromaticity of 0.59 was obtained.
- the maximum emission wavelength was 545 nm.
- Example 2 Another green light emitting device was manufactured.
- An organic EL device was manufactured in the same manner as in Example 1 except that the quinacridone derivative obtained in Synthesis Example 6 was used instead of using the quinacridone derivative obtained in Synthesis Example 1.
- a red light-emitting device is produced in the same manner as in Example 1 except that the p-diphenylamine derivative obtained in Synthesis Example 3 is used instead of using the quinacridone derivative obtained in Synthesis Example 1. Good red emission is observed.
- a coating type green light emitting device was manufactured.
- the ITO substrate was ultrasonically washed with acetone for 10 minutes, then with IPA for 10 minutes, and dried in a nitrogen stream.
- the dried substrate was subjected to UV-zone treatment for 5 minutes using a photo surface processor PL 16-110 manufactured by Sen Special Light Source Co., Ltd.
- the fabricated device was supplied with a voltage of 1 V per second with Fast BM-7 manufactured by Topcon Co., Ltd. And the optical properties were measured. Table 4 shows the results.
- a red light emitting device is manufactured in exactly the same manner as in Example 4 except that the p-phenylenediamine derivative obtained in Synthesis Example 3 is used instead of using the quinacridone derivative obtained in Synthesis Example 1. be able to.
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- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electroluminescent Light Sources (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012116784A (ja) * | 2010-11-30 | 2012-06-21 | Idemitsu Kosan Co Ltd | 縮合多環化合物、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 |
WO2018020869A1 (ja) * | 2016-07-27 | 2018-02-01 | 富士フイルム株式会社 | 光電変換素子、撮像素子、光センサ、化合物 |
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2004
- 2004-01-26 JP JP2005504695A patent/JPWO2004067674A1/ja active Pending
- 2004-01-26 WO PCT/JP2004/000645 patent/WO2004067674A1/ja active Application Filing
- 2004-01-30 TW TW093102118A patent/TW200427817A/zh unknown
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012116784A (ja) * | 2010-11-30 | 2012-06-21 | Idemitsu Kosan Co Ltd | 縮合多環化合物、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 |
WO2018020869A1 (ja) * | 2016-07-27 | 2018-02-01 | 富士フイルム株式会社 | 光電変換素子、撮像素子、光センサ、化合物 |
JPWO2018020869A1 (ja) * | 2016-07-27 | 2019-06-20 | 富士フイルム株式会社 | 光電変換素子、撮像素子、光センサ、化合物 |
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JPWO2004067674A1 (ja) | 2006-06-01 |
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