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Definitions

• the present invention relates to an aromatic amine derivative and an organic electoluminescence device using the same, and in particular, an organic electoluminescence device having a long lifetime and high luminous efficiency and high color purity blue emission can be obtained. It relates to an aromatic amine derivative to be realized.
• an EL element is composed of a light emitting layer and a pair of counter electrodes sandwiching the 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.
• this is a phenomenon in which these electrons recombine with holes in the light emitting layer to generate an excited state, and energy is emitted as light when the excited state returns to the ground state.
• Patent Document 1 For example, a technique using a single monoanthracene compound as an organic light-emitting material is disclosed (Patent Document 1). However, in this technology, for example, at a current density of 165 mA / cm 2 , only a luminance of 1650 cdZm 2 is obtained, and the efficiency is very low with LED / A, which is not practical.
• Patent Document 2 a technique using a single bisanthracene compound as an organic light emitting material is disclosed (Patent Document 2). However, even with this technology, even though the efficiency is about: 3 to 3 cd / A, improvement for practical use has been demanded.
• Patent Document 3 a long-life organic EL device using a distyryl compound as an organic light-emitting material and containing styrylamine added thereto has been proposed (Patent Document 3).
• this device has been required to be further improved so that its lifetime is not sufficient.
• Patent Document 4 a technique using a mono- or bisanthracene compound and a distilil compound as an organic light-emitting medium layer is disclosed (Patent Document 4).
• Patent Document 4 a technique using a mono- or bisanthracene compound and a distilil compound as an organic light-emitting medium layer is disclosed.
• the emission spectrum has become longer due to the conjugated structure of the styryl compound, which deteriorates the color purity.
• Patent Document 5 discloses a blue light emitting device using a diaminotalicene derivative. However, although this device has excellent luminous efficiency, there has been a demand for further improvement with a sufficient lifetime.
• Patent Document 1 Japanese Patent Laid-Open No. 11-3782
• Patent Document 2 JP-A-8-12600
• Patent Document 3 International Publication WO94Z006157
• Patent Document 4 Japanese Patent Laid-Open No. 2001-284050
• Patent Document 5 International Publication WO04Z044088
• the present invention has been made to solve the above-mentioned problems, and is an organic EL device that has a long lifetime, a high light emission efficiency, a high color purity, and a blue light emission, and an aromatic that realizes the organic EL device.
• the object is to provide an amine derivative.
• the present invention provides an aromatic amine derivative represented by the following general formula (1).
• a to A each independently represent a hydrogen atom, a substituted or unsubstituted carbon atom having 1 to 5 carbon atoms.
• a, b, c, d are each independently 0-3 Represents an integer.
• a to A may be the same or different.
• a to A are each independently a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,
• A, A and A, and A and A may combine with each other to form a saturated or unsaturated ring.
• R to R each independently represent a hydrogen atom, a substituted or unsubstituted carbon atom having 1 to 20 carbon atoms.
• the present invention provides an organic EL device in which an organic thin film layer composed of one or more layers including at least a light emitting layer is sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers is the fragrance.
• the present invention provides an organic EL device containing a group amine derivative alone or as a component of a mixture.
• the organic EL device using the aromatic amine derivative of the present invention has sufficient light emission luminance in practical use at a low applied voltage, and has a long lifetime that is difficult to deteriorate even when used for a long time because of high light emission efficiency. Les.
• FIG. 1 is a view showing an NMR spectrum of an aromatic amine derivative of the present invention obtained in Synthesis Example 1.
• FIG. 2 is a diagram showing a 1 H-NMR spectrum of an aromatic amine derivative of the present invention obtained in Synthesis Example 2.
• FIG. 3 is a diagram showing a 1 H-NMR spectrum of an aromatic amine derivative of the present invention obtained in Synthesis Example 3.
• FIG. 4 is a diagram showing a 1 H-NMR spectrum of an aromatic amine derivative of the present invention obtained in Synthesis Example 4.
• the aromatic amine derivative of the present invention is a compound represented by the following general formula (1).
• a 1 to A 4 are each independently a hydrogen atom, substituted or unsubstituted
• Substituted or unsubstituted alkyl group having 1 to 50 carbon atoms (preferably 1 to 20 carbon atoms), substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms (preferably having 5 to 20 nuclear carbon atoms), substituted or unsubstituted Substituted aralkyl group having 6 to 50 nuclear carbon atoms (preferably 6 to 20 carbon atoms), substituted or unsubstituted cycloalkyl group having 3 to 50 nuclear carbon atoms (preferably 5 to 12 carbon atoms)
• a to A each independently represents a substituted or unsubstituted carbon number of 1 to 50 (preferably carbon
• a group (preferably having 6 to 20 nuclear carbon atoms), a substituted or unsubstituted cycloalkyl group having 3 to 50 (preferably 5 to 12 nuclear carbon atoms) cycloalkyl group, a substituted or unsubstituted carbon atom having 1 to 50 carbon atoms (Preferably 1 to 6 carbon atoms) alkoxyl group, substituted or unsubstituted nuclear carbon number 5 to 50 (preferably 5 to 18 carbon atoms) aryloxy group, substituted or unsubstituted nuclear carbon number An arylamino group having 5 to 50 (preferably 5 to 18 carbon atoms), a substituted or unsubstituted alkylamino group having 1 to 20 carbon atoms (preferably 1 to 6 carbon atoms), a substituted or unsubstituted nucleus A heterocyclic group having 5 to 50 carbon atoms (preferably a nuclear carbon number of 5 to 20) or a halogen atom.
• alkyl groups A to A include, for example, a methinole group, an ethyl group, a propyl group,
• Pinole group butyl group, see-butyl group, tert_butyl group, pentyl group, hexyl group, heptyl group, octyl group, stearyl group, 2-phenylisopropyl group, trichloromethyl group, trifluoromethyl group , Benzyl group, monophenoxybenzyl group, hi, monodimethylbenzylene group, hi, monomethylphenylbenzyl group, hi, didifluoromethylbenzyl group, triphenylmethyl group, One benzyloxybenzyl group and the like can be mentioned.
• Examples of the aryl group of A to A include a phenyl group, a 2_methylphenyl group, and a 3-methyl group.
• Examples of the aralkyl groups A to A include a benzyl group, a 1_phenylethyl group, and 2
• Examples of the cycloalkyl groups A to A include a cyclopropyl group, a cyclobutyl group,
• Examples include cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, bicycloheptyl group, bicyclooctinole group, tricycloheptyl group, adamantyl group, etc., cyclopentyl group, cyclohexyl group, etc. Group, cycloheptyl group, bicycloheptyl group, bicyclooctyl group and adamantyl group are preferred.
• alkoxyl group of A to A examples include, for example, methoxy group, ethoxy group, propoxy group
• Examples of the aryloxy group of A to A include a phenoxy group, a triloxy group, and a naphthyl group.
• arylamino group of A to A for example, diphenylamino group, ditolylamino group,
• Examples thereof include a dinaphthylamino group and a naphthylphenylamino group.
• alkylamino group of A to A examples include, for example, a dimethylamino group, a jetylamino group,
• heterocyclic group of A to A examples include imidazole, benzimidazole, and pyrrole.
• halogen atoms A to A examples include a fluorine atom, a chlorine atom, and a bromine atom.
• a to (! Each independently represents an integer of 0 to 3, preferably 0 to:!.
• a to A may be the same or different.
• a and A, A and A may be linked together to form a saturated or unsaturated ring.
• a and A, A and A may be linked together to form a saturated or unsaturated ring.
• a and A, and A and A may combine with each other to form a saturated or unsaturated ring.
• this ring examples include cycloalkanes having 4 to 12 carbon atoms such as cyclobutane, cyclopentane, cyclohexane, adamantane and norbornane, and cycloalkanes having 4 to 12 carbon atoms such as cyclobutene, cyclopentene, cyclohexene, cycloheptene and cyclootaten.
• C6-C12 cycloalkadiene such as cycloalkene, cyclohexadiene, cyclohexadiene, cyclooctadiene, etc.
• C6-C50 such as benzene, naphthalene, phenanthrene, anthracene, pyrene, chrysene, and isanaphthylene Examples thereof include aromatic rings, heterocyclic rings having 5 to 50 carbon atoms such as imidazole, pyrrole, furan, thiophene and pyridine.
• R 1 to R 4 are each independently a hydrogen atom, substituted or unsubstituted
• the substituents for A A and R R include a substituted or unsubstituted nuclear carbon number of 5
• alkyl groups having 1 to 10 carbon atoms cycloalkyl groups having 5 to 7 carbon atoms, alkyl groups having 1 to 6 carbon atoms and alkoxy groups having 1 to 10 carbon atoms are preferred, and cycloalkyl groups having 5 to 7 carbon atoms are preferred. More preferred are methylol group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, n xyl group, cyclopentyl group and cyclohexyl group. Particularly preferred.
• R R is a hydrogen atom.
• the structure is represented by the following general formula (2).
• a A force is independently substituted or substituted.
• it is a substituted or unsubstituted alkyl group having 150 carbon atoms.
• [0029] [Chemical 10] [0030] Among these compounds, compounds (D-1), (D-2), (D-5), (D-6), (D9), (D-17), (D— 18), (D-20), (D-21), (D-22), (D-23), (D-25) and (D-26) are preferred.
• the method for producing the aromatic amine derivative represented by the general formula (1) of the present invention is not particularly limited and may be produced by a known method, for example, Rev. Roum. Chim., 34 1907 (1989) (MD Bancia 6) 12 and 12 dib mouth moclicene obtained by the method described in the above) are aminated with diallylamine to produce an aromatic amine derivative.
• the aromatic amine derivative represented by the general formula (1) of the present invention has a diaminotalicene structure, which is a luminescent center, linked to a benzene ring having a substituent, thereby allowing the compounds to meet each other. Therefore, the lifetime is prolonged, and by increasing the number of substituents to 2 or more, the association between the compounds is further prevented, and the lifetime is further improved.
• it has strong fluorescence in the solid state, excellent electroluminescence, and fluorescence quantum efficiency of 0.3 or more.
• it has excellent hole injection and hole transport properties from metal electrodes or organic thin film layers, and excellent electron injection and electron transport properties from metal electrodes or organic thin film layers. It is effectively used as a light emitting material for devices, particularly as a doping material, and other hole transporting materials, electron transporting materials or doping materials may be used.
• the organic EL device of the present invention is a device in which one or more organic thin film layers are formed between an anode and a cathode.
• a light emitting layer is provided between the anode and the cathode.
• the light emitting layer contains a light emitting material, and may further contain a hole injecting material or an electron injecting material to transport holes injected from the anode or electrons injected from the cathode to the light emitting material.
• the aromatic amine derivative of the present invention has high light emission characteristics and has excellent hole injection properties, hole transport properties, electron injection properties, and electron transport properties, and thus emits light as a light emitting material or a driving material. Can be used for layers.
• the preferred content when the light emitting layer contains the aromatic amine derivative of the present invention is usually from 0.:! To 20% by weight, and from :! to 10% by weight. This is even better.
• the aromatic amine derivative of the present invention has an extremely high fluorescence quantum effect. Therefore, it is possible to form a light-emitting layer using only this aromatic amine derivative.
• the organic EL device of the present invention is an organic EL device in which two or more organic thin film layers including at least a light emitting layer are sandwiched between a cathode and an anode, and the fragrance of the present invention is interposed between the anode and the light emitting layer. It is also preferable to have an organic layer mainly composed of a group amine derivative. Examples of the organic layer include a hole injection layer and a hole transport layer.
• the host material is at least selected from an anthracene derivative of the following general formula (3), an anthracene derivative of (4) and a pyrene derivative of (5) It is preferable to contain one kind.
• X and X are each independently a hydrogen atom, substituted or unsubstituted
• Ar and Ar are each independently a substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms.
• n is an integer between :! When m is 2 or more, the groups in [] may be the same or different. )
• X to X each independently represent a hydrogen atom, a substituted or unsubstituted carbon
• X when e, f, g is 2 or more
• X 1 and x 2 may be the same or different.
• Ar is a substituted or unsubstituted aryl group having 10 to 50 condensed carbon atoms and containing A
• r is a substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms.
• n is an integer from:! When n is 2 or more, the groups in [] may be the same or different. )
• anthracene derivatives represented by the general formulas (3) and (4) are shown below, but are not limited to these exemplified compounds.
• Ar and Ar are each independently a substituted or unsubstituted number of nuclear carbon atoms.
• L and L are each independently a substituted or unsubstituted phenylene group, substituted or unsubstituted
• s is an integer from 0 to 2
• p is an integer from 1 to 4
• q is an integer from 0 to 2
• r is an integer from 0 to 4.
• L or Ar is bonded to any of the 1-5 positions of pyrene, and L or Ar is pyrene.
• L and L or pyrene are different bonding positions on Ar and Ar, respectively.
• the organic EL device having a multi-layered organic thin film layer includes (anode / hole injection layer / light emitting layer / cathode), (anode / light emitting layer / electron injection layer / cathode), (anode / positive electrode).
• a hole injection layer / a light emitting layer / an electron injection layer / a cathode For example, a hole injection layer / a light emitting layer / an electron injection layer / a cathode).
• the organic thin film layer has a multi-layered structure, so that it is possible to prevent a decrease in luminance and life due to quenching.
• a light emitting material, a doping material, a hole injection material, and an electron injection material can be used in combination.
• the driving material can improve luminous brightness and luminous efficiency, and red and blue light emission can be obtained.
• the hole injection layer, the light emitting layer, and the electron injection layer may each be formed by a layer configuration of two or more layers.
• the layer that injects holes from the electrode is the hole injection layer
• the layer that receives holes from the hole injection layer and transports the holes to the light emitting layer is the hole transport layer.
• a layer that injects electrons from an electrode is referred to as an electron injection layer
• a layer that receives electrons from the electron injection layer and transports electrons to a light emitting layer is referred to as an electron transport layer.
• Each of these layers is selected and used depending on factors such as the energy level of the material, heat resistance, and adhesion to the organic layer or metal electrode.
• Host materials or doping materials other than the above general formulas (3) to (5) that can be used in the light emitting layer together with the aromatic amine derivative of the present invention include, for example, naphthalene, phenanthrene, norebrene, anthracene, tetracene, Pyrene, Perylene, Talycene, Decacyclene, Coronene, Tetraphenylcyclopentagen, Pentaphenylcyclopentagen, Fluorene, Spirofluorene, 9, 10-Diphenylanthracene, 9, 10-Bis (phenylethynyl) anthracene 1, 4 Condensed polyaromatic compounds such as bis (9'ethynylanthracenyl) benzene and their derivatives, tris (8 quinolinolato) aluminum, bis (2-methinole 8-quinolinolato) 4- (phenyl) Phenolate) Organometallic complexes such as aluminum,
• the hole injecting material has the ability to transport holes, has a hole injecting effect from the anode, and an excellent hole injecting effect for the light emitting layer or the light emitting material, and is generated in the light emitting layer.
• a compound that prevents the exciton from moving to the electron injection layer or the electron injection material and has an excellent thin film forming ability is preferable.
• phthalocyanine derivatives naphthalocyanine derivatives, Lufirin derivatives, oxazole, oxaziazole, triazole, imidazole, imidazolone, imidazolethione, pyrazoline, pyrazolone, tetrahydroimidazole, oxazole, oxadiazole, hydrazone, acylhydrazone, polyarylalkane, stinolevene, butadiene, benzidine type triphenyl Examples thereof include, but are not limited to, min, styrylamine triphenylamine, diamine type triphenylamine, and derivatives thereof, and polymer materials such as polybutylcarbazole, polysilane, and conductive polymer. is not.
• aromatic tertiary amine derivatives include triphenylamine, tritolylamine, tolyldiphenylamine, N, N, 1-diphenyl-1-N, N ′-(3-methylphenyl) -1,1,1,1-biphenyl-1 4 , 4, 1 diamin, N, N, N,, N, 1 (4-methylphenyl) 1 1, 1, 1 phenol 2, 4, 1 diamin, N, N, ⁇ ', ⁇ , 1 ( 4-methylphenyl) 1, 1 '-biphenyl 4, 4'-diamin, ⁇ , N' -diphenyl 2- '-(Methylphenyl) ⁇ , N'-(4— ⁇ -Butylphenyl) —Phenanthrene 9,10-Diamine, ⁇ , ⁇ ⁇ Bis (4-Di-4-tolylaminophenyl) 4 Phenylol cyclohexane, etc. Or an oligomer or polymer
• Examples of phthalocyanine (p c ) derivatives include HPc, CuPc, CoPc, NiPc, and ZnPc.
• the organic EL device of the present invention is a layer containing these aromatic tertiary amine derivatives and / or phthalocyanine derivatives, for example, the hole transport layer or the hole injection layer, between the light emitting layer and the anode. Is preferably formed.
• the electron injecting material has the ability to transport electrons, has an electron injecting effect from the cathode, and an excellent electron injecting effect with respect to the light emitting layer or the light emitting material, and corrects the excitons generated in the light emitting layer.
• Compounds that prevent migration to the hole injection layer and have excellent thin film forming ability are preferred. . Specific examples include fluorenone, anthraquinodimethane, diphenoquinone, thiopyrandioxide, oxazole, oxadiazole, triazolene, imidazole, perylenetetra force rubonic acid, fluorenylidenemethane, anthraquinodimethane, anthrone and their derivatives. However, it is not limited to these. Further, it can be sensitized 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 metal complex compounds and nitrogen-containing five-membered ring derivatives.
• Examples of the metal complex compound include 8-hydroxyquinolinatotrithium, 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] quinolinato) beryllium Bis (10-hydroxybenzo [h] quinolinate) zinc, bis (2-methyl-8 quinolinate) black gallium, bis (2-methyl-8 quinolinato) (o cresolate) gallium, bis (2-methyl-8 quinolinate) ) (1-Naphthato) aluminum, bis (2-methyl-8 quinolinate) (2 Naphthra) G) is not limited to these forces gallium, and the like.
• nitrogen-containing five-membered derivative for example, oxazole, thiazole, oxadiazole, thiadiazole, and triazole derivatives are preferable.
• 2,5 bis (1-phenol) -1,3,4-oxazole, dimethyl POPOP 2,5 bis (1-phenol) 1,3,4-thiazole, 2,5 —Bis (1-phenyl) -1,3,4-oxadiazol, 2_ (4, _tert_butylphenyl) _ 5 _ (4 "-biphenyl) 1,3,4-oxadiazol, 2, 5_ Bis (1-naphthyl) _ 1, 3, 4_ oxadiazole, 1, 4_ bis [2_ (5 _phenyloxadiazolyl)] benzene, 1, 4_ bis [2— (5-phenyl) _4_tert_butylbenzene], 2- (4 '_tert_butylphenyl) _ 5_ (4 "—bi
• a light emitting material in addition to at least one aromatic amine derivative selected from general formula (1), a light emitting material, a doping material, a hole injection material, and At least one of the electron injection materials may be contained in the same layer.
• a protective layer is provided on the surface of the device, or the entire device is protected by silicon oil, resin, etc. Is also possible.
• a material having a work function larger than 4 eV is suitable, and carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold Platinum, palladium, etc. and their alloys, metal oxides such as tin oxide and indium oxide used for ITO substrates and NES A substrates, and organic conductive resins such as polythiophene and polypyrrole are used.
• the conductive material used for the cathode those having a work function smaller than 4 eV are suitable, such as magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, ano-reminium, lithium fluoride, etc. And the force with which these alloys are used.
• magnesium / silver, magnesium / indium, lithium / aluminum, and the like, which are representative examples, are not limited to these.
• the ratio of the alloy is controlled by the temperature of the deposition source, the atmosphere, the degree of vacuum, etc., and is selected to an appropriate ratio. If necessary, the anode and the cathode may be formed of two or more layers.
• the organic EL device of the present invention in order to emit light efficiently, it is desirable that at least one surface be sufficiently transparent in the light emission wavelength region of the element. It is also desirable that the substrate be transparent.
• the transparent electrode is set using the conductive material described above so as to ensure a predetermined translucency by a method such as vapor deposition or sputtering.
• 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 strength and has transparency, but includes a glass substrate and a transparent resin film.
• transparent resin films examples include polyethylene, ethylene-butyl acetate copolymer, ethylene-butyl alcohol copolymer, polypropylene, polystyrene, polymethyl methacrylate.
• each layer of the organic EL device according to the present invention may be performed by a dry film formation method such as vacuum deposition, sputtering, plasma, ion plating, or a wet film formation method such as spin coating, dating, or flow coating.
• a deviation method can be applied.
• the film thickness is not particularly limited, but should be set to an appropriate film thickness. If the film thickness is too thick, 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 film thickness is in the range of 5 nm to 10 ⁇ , but more preferably in the range of 10 nm to 0.2 ⁇ .
• the material for forming each layer is dissolved or dispersed in an appropriate solvent such as ethanol, chloroform, tetrahydrofuran, dioxane or the like to form a thin film, but any solvent may be used.
• an appropriate resin or additive may be used for improving the film forming property and preventing pinholes in the film.
• resins that can be used include insulating resins such as polystyrene, polycarbonate, polyarylate, polyester, polyamide, polyurethane, polysulfone, polymethylmetatalylate, polymethylatarylate, and cellulose, and copolymers thereof.
• photoconductive resins such as poly_ ⁇ _bulucarbazole and polysilane, and conductive resins such as polythiophene and polypyrrole.
• the additive include an antioxidant, an ultraviolet absorber, and a plasticizer.
• the organic EL device of the present invention can be used for flat light emitters such as flat panel displays of wall-mounted televisions, light sources such as copiers, printers, backlights of liquid crystal displays or instruments, display boards, indicator lamps, and the like.
• the material of the present invention is an electron that can be achieved by using only organic EL elements. It can also be used in the fields of photographic photoreceptors, photoelectric conversion elements, solar cells, image sensors and the like.
• a transparent electrode made of indium tin oxide with a thickness of 120 nm was provided on a 1 mm size glass substrate. After cleaning this glass substrate by irradiating it with ultraviolet rays and ozone, this substrate was placed in a vacuum deposition apparatus.
• N ′, N ”-bis [4- (diphenylamino) phenyl] —N ′, N” —diphenylbiphenyl _4,4'-diamine was deposited to a thickness of 60 nm.
• N, N, ⁇ ', ⁇ '-tetrakis (4-biphenyl) -1,4'-benzidine was deposited to a thickness of 20 nm as a hole transport layer.
• Example 1 an organic EL device was produced in the same manner except that the compound (D_5) was used instead of the compound (D_1) as a doping material.
• a current test was conducted on the obtained device. As a result, blue light emission with a voltage of 6.5 V, a current density of 10 mA / cm 2 , a light emission efficiency of 7.8 cd / A, and a light emission luminance of 780 cd / m 2 (maximum light emission wavelength: 468 nm) was gotten.
• a continuous direct current test was conducted at an initial luminance of 500 cd / m 2 , the half-life was 20000 hours or more.
• An organic EL device was produced in the same manner as in Example 1 except that the compound (D-9) was used instead of the compound (D-1) as the doping material.
• a current test was conducted on the obtained device. As a result, blue light was emitted at a voltage of 6.5 V, a current density of 10 mA / cm 2 , an emission efficiency of 8.6 cd / A, and an emission luminance of 860 cd / m 2 (maximum emission wavelength: 471 nm). was gotten. When a continuous direct current test was conducted at an initial luminance of 500 cd / m 2 , the half-life was 20000 hours or more.
• Example 1 In Example 1, except that 10- (3- (naphthalene-1-inole) fenenole) -9- (naphthalene_2-inole) anthracene was used as the host material instead of the compound (BTBAN). Similarly, an organic EL device was produced.
• Example 2 1-(9,9-dimethinole 2 (pyrene 1-yl) 1 9-fluorene 1-yl) pyrene was used in place of the compound (BTBAN) as the host material. Produced an organic EL device in the same manner.
• blue light emission (maximum emission wavelength: 469 nm) with a light emission efficiency of 7.6 cdZA and a light emission luminance of 760 cdZm 2 was obtained at a voltage of 6.5 V and a current density of 10 mA / cm 2 . .
• a DC continuous current test at an initial luminance 500cdZm 2, half life was not less than 18000 hours.
• Example 2 1- (4- (naphthalene-1-yl) phenyl) 6 (naphthalene-2-yl) pyrene was used in place of the compound (BTBAN) as the host material. An organic EL device was fabricated.
• a current test was conducted on the obtained device. As a result, blue light was emitted at a voltage of 6.5 V, a current density of 10 mA / cm 2 , an emission efficiency of 7.8 cd / A, and an emission luminance of 780 cd / m 2 (maximum emission wavelength: 469 nm). was gotten. When a DC continuous energization test was performed at an initial luminance of 500 cd / m 2 , the half-life was 19000 hours or more.
• Example 1 an organic EL device was produced in the same manner except that 6, 12 bis (diphenylamino) talisene was used as the doping material instead of the compound (D-1).
• a current test was performed on the obtained device, blue light emission (maximum emission wavelength: 451 nm) with a luminous efficiency of 3. lcd / A and emission luminance of 311 cdZm 2 was obtained at a voltage of 6.2 V and a current density of 10 mA / cm 2 . It was.
• a DC continuous energization test was performed at an initial luminance of 500 cdZm 2 , the half-life was as short as 1000 hours.
• Example 1 it was the same except that 6,12-bis (4-isopropylphenyl-p-tolylamino) talicene was used as the doping material instead of the compound (D-1).
• Machine EL device was manufactured.
• blue light was emitted at a voltage of 6.3 V, a current density of 10 mA / cm 2 , an emission efficiency of 5.9 cd / A, and an emission luminance of 594 cd / m 2 (maximum emission wavelength: 462 nm). was gotten.
• a continuous direct current test was conducted at an initial luminance of 500 cdZm 2 , the half-life was 4590 hours.
• the organic EL device using the aromatic amine derivative of the present invention can provide a practically sufficient emission luminance at a low applied voltage, and deteriorates even when used for a long time with high luminous efficiency. Long life. Therefore, it is useful as a light source such as a flat light emitter of a wall-mounted television and a backlight of a display.

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