JP2001319782A - Hydrocarbon compound and organic electroluminescent element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic electroluminescent element which is superior in the luminous efficiency, and which emits light in a high luminance. SOLUTION: This is a compound and the electroluminescent element which uses the compound expressed in a formula (1-A). In the formula, X1 to X22 respectively represent independently hydrogen atom, halogen atom, straight chain, branched or cyclic alkyl group, straight chain, branched or cyclic alkoxy group, or substituted or unsubstituted aryl group.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent device and a novel hydrocarbon compound which can be suitably used for the device.

[0002]

2. Description of the Related Art Conventionally, an inorganic electroluminescent device has been used as a panel-type light source such as a backlight. However, driving the light emitting device requires a high AC voltage. Recently, an organic electroluminescent device (organic electroluminescent device: organic EL device) using an organic material as a light emitting material has been developed [Appl. Phys. Lett., 51 , 91].
3 (1987)]. An organic electroluminescent element has a structure in which a thin film containing a fluorescent organic compound is sandwiched between an anode and a cathode, and electrons and holes are injected into the thin film and recombined to form excitons. (Exciton), and emits light using light emitted when the exciton is deactivated. The organic electroluminescent element can emit light at a low DC voltage of about several volts to several tens of volts, and has various colors (for example,
(Red, blue, green). Organic electroluminescent devices having such characteristics are expected to be applied to various light emitting devices, display devices, and the like. However, in general, the emission luminance is low and is not practically sufficient.

As a method for improving light emission luminance, an organic electroluminescent device using, for example, tris (8-quinolinolato) aluminum as a host compound, a coumarin derivative, or a pyran derivative as a guest compound (dopant) has been proposed as a light emitting layer. [J. Appl. Phys., 65 , 3610 (1
989)]. For the light emitting layer, for example, bis (2-methyl-8-quinolinolate) (4-phenylphenolate) aluminum is used as a host compound, and an acridone derivative (for example, N-methyl-2-methoxyacridone) is used as a guest compound. An organic electroluminescent device has been proposed (JP-A-8-67873). However,
It is hard to say that these light-emitting elements also have sufficient light emission luminance. At present, an organic electroluminescent device that emits light with higher luminance is desired.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an organic electroluminescent device which is excellent in luminous efficiency and emits light with high luminance. Another object is to provide a novel hydrocarbon compound that can be suitably used for the light-emitting element.

[0005]

Means for Solving the Problems The present inventors have made intensive studies on the organic electroluminescent device, and as a result, have completed the present invention. That is, the present invention provides a method for preparing s-indaceno [1,2,3-cd: 5,6,7-c ′ between a pair of electrodes.
d '] a layer containing at least one diperylene derivative,
An organic electroluminescent device having at least one layer sandwiched therein, wherein the layer containing the s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative is a light emitting layer. The light-emitting element, wherein the layer containing the s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative further contains a light-emitting organometallic complex. Or the organic electroluminescent device according to the above, wherein the layer containing the s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative further contains a triarylamine derivative. The organic electroluminescent device according to the above or the above, wherein the organic electroluminescent device according to any one of the above-mentioned, further comprising a hole injecting / transporting layer, between a pair of electrodes, further between the pair of electrodes, further electron injection. The organic electroluminescent device according to any one of the above, having a transport layer, s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative Is the compound represented by the general formula (1-A) (Formula 3).

[0006]

Embedded image (Wherein X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group, a straight-chain,
Represents a branched or cyclic alkoxy group, or a substituted or unsubstituted aryl group. Furthermore, the present invention relates to a hydrocarbon compound represented by the general formula (1-A) (Formula 4).

[0007]

Embedded image (Wherein X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group, a straight-chain,
Represents a branched or cyclic alkoxy group, or a substituted or unsubstituted aryl group. )

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The organic electroluminescent device of the present invention has at least one layer containing at least one s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative between a pair of electrodes. It is something that is pinched. S-Indaseno according to the present invention
[1,2,3-cd: 5,6,7-c'd '] diperylene derivative (hereinafter abbreviated as compound A according to the present invention) is represented by the following general formula (1): It represents a compound having a skeleton.
The skeleton represented by the general formula (1) may be substituted with various substituents, and the compound A according to the present invention is preferably represented by the general formula (1-A) It is a hydrocarbon compound.

[0009]

Embedded image (Wherein X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group, a straight-chain,
Represents a branched or cyclic alkoxy group, or a substituted or unsubstituted aryl group. )

In the compound represented by the general formula (1-A), X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a linear, branched or cyclic alkyl group, a linear, branched or cyclic alkyl group. Represents an alkoxy group or a substituted or unsubstituted aryl group. In the present invention, the aryl group means a carbocyclic aromatic group such as a phenyl group and a naphthyl group, and a heterocyclic aromatic group such as a furyl group, a thienyl group and a pyridyl group. In the compound represented by the general formula (1-A), X _{1 to} X ₂₂ are preferably a hydrogen atom, a halogen atom, a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, and 1 to 20 carbon atoms. Represents a linear, branched or cyclic alkoxy group or a substituted or unsubstituted aryl group having 4 to 20 carbon atoms.

Specific examples of X _{1 to} X ₂₂ in the general formula (1-A) include, for example, a hydrogen atom; for example, a halogen atom such as a fluorine atom, a chlorine atom and a bromine atom;
Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, te
rt-butyl group, n-pentyl group, isopentyl group, neopentyl group, tert-pentyl group, n-hexyl group, 1-
Methylpentyl group, 4-methyl-2-pentyl group, 3,
3-dimethylbutyl group, 2-ethylbutyl group, n-heptyl group, 1-methylhexyl group, cyclohexylmethyl group, n-octyl group, tert-octyl group, 1-methylheptyl group, 2-ethylhexyl group, 2-propyl Pentyl group, n-nonyl group, 2,2-dimethylheptyl group,
2,6-dimethyl-4-heptyl group, 3,5,5-trimethylhexyl group, n-decyl group, n-undecyl group,
1-methyldecyl group, n-dodecyl group, n-tridecyl group, 1-hexylheptyl group, n-tetradecyl group, n
-Pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group, n-eicosyl group, cyclopentyl group, cyclohexyl group, 4-methylcyclohexyl group, 4-tert-butylcyclohexyl group, cycloheptyl group, cyclooctyl Linear, branched or cyclic alkyl groups such as groups;

For example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, n-pentyloxy, neopentyloxy, cyclopentyloxy,
n-hexyloxy group, 3,3-dimethylbutyloxy group, 2-ethylbutyloxy group, cyclohexyloxy group, n-heptyloxy group, n-octyloxy group, 2
-Ethylhexyloxy group, n-nonyloxy group, n-
Decyloxy group, n-undecyloxy group, n-dodecyloxy group, n-tridecyloxy group, n-tetradecyloxy group, n-pentadecyloxy group, n-hexadecyloxy group, n-heptadecyloxy group , N-octadecyloxy group, n-eicosyloxy group and other straight-chain,
A branched or cyclic alkoxy group;

For example, phenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 4
-Ethylphenyl group, 4-n-propylphenyl group, 4
-Isopropylphenyl group, 4-n-butylphenyl group, 4-isobutylphenyl group, 4-tert-butylphenyl group, 4-isopentylphenyl group, 4-tert-pentylphenyl group, 4-n-hexylphenyl group, 4-cyclohexylphenyl group, 4-n-heptylphenyl group, 4-n-octylphenyl group, 4-n-nonylphenyl group, 4-n-decylphenyl group, 4-n-undecylphenyl group, 4-n -Dodecylphenyl group, 4-n-
Tetradecylphenyl group, 2,3-dimethylphenyl group, 2,4-dimethylphenyl group, 2,5-dimethylphenyl group, 2,6-dimethylphenyl group, 3,4-dimethylphenyl group, 3,5-dimethyl Phenyl group, 3,
4,5-trimethylphenyl group, 2,3,5,6-tetramethylphenyl group, 5-indanyl group, 1,2,3
4-tetrahydro-5-naphthyl group, 1,2,3,4-
Tetrahydro-6-naphthyl group, 2-methoxyphenyl group, 3-methoxyphenyl group, 4-methoxyphenyl group, 3-ethoxyphenyl group, 4-ethoxyphenyl group, 4-n-propoxyphenyl group, 4-isopropoxyphenyl Group, 4-n-butoxyphenyl group, 4-isobutoxyphenyl group, 4-n-pentyloxyphenyl group, 4-n-hexyloxyphenyl group, 4-cyclohexyloxyphenyl group, 4-n-heptyloxyphenyl group , 4-n-octyloxyphenyl group, 4-n-
Nonyloxyphenyl group, 4-n-decyloxyphenyl group, 4-n-undecyloxyphenyl group, 4-n-
Dodecyloxyphenyl group, 4-n-tetradecyloxyphenyl group,

2,3-dimethoxyphenyl group, 2,4-
Dimethoxyphenyl group, 2,5-dimethoxyphenyl group, 3,4-dimethoxyphenyl group, 3,5-dimethoxyphenyl group, 3,5-diethoxyphenyl group, 2-methoxy-4-methylphenyl group, 2-methoxy -5-methylphenyl group, 2-methyl-4-methoxyphenyl group, 3-methyl-4-methoxyphenyl group, 3-methyl-5-methoxyphenyl group, 2-fluorophenyl group,
3-fluorophenyl group, 4-fluorophenyl group, 2
-Chlorophenyl group, 3-chlorophenyl group, 4-chlorophenyl group, 4-bromophenyl group, 4-trifluoromethylphenyl group, 2,4-difluorophenyl group,
2,4-dichlorophenyl group, 3,4-dichlorophenyl group, 3,5-dichlorophenyl group, 2-methyl-4-
Chlorophenyl group, 2-chloro-4-methylphenyl group, 3-chloro-4-methylphenyl group, 2-chloro-
4-methoxyphenyl group, 3-methoxy-4-fluorophenyl group, 3-methoxy-4-chlorophenyl group, 3
-Fluoro-4-methoxyphenyl group, 4-phenylphenyl group, 3-phenylphenyl group, 4- (4'-methylphenyl) phenyl group, 4- (4'-methoxyphenyl) phenyl group, 1-naphthyl group, 2-naphthyl group, 4
-Methyl-1-naphthyl group, 4-ethoxy-1-naphthyl group, 6-n-butyl-2-naphthyl group, 6-methoxy-2-naphthyl group, 7-ethoxy-2-naphthyl group, 2
And substituted or unsubstituted aryl groups such as -furyl, 2-thienyl, 3-thienyl, 2-pyridyl, 3-pyridyl and 4-pyridyl.

More preferably, a hydrogen atom, a fluorine atom,
Chlorine atom, C1-C10 alkyl group, C1-C1
An alkoxy group having 0 or an aryl group having 6 to 12 carbon atoms, more preferably a hydrogen atom, a fluorine atom, a chlorine atom, an alkyl group having 1 to 6 carbon atoms,
It is an alkoxy group having 6 or an aryl group having 6 to 10 carbon atoms.

In the organic electroluminescent device of the present invention, s
-Indaceno [1,2,3-cd: 5,6,7-c'd '] is characterized by using at least one diperylene derivative, for example,
When a s-indaceno [1,2,3-cd: 5,6,7-c'd '] diperylene derivative is used as a light emitting component in a light emitting layer, it emits red light with high luminance and excellent durability, which has not been achieved in the past. It is possible to provide an organic electroluminescent device having the following characteristics. In addition, when a light-emitting layer is formed in combination with another light-emitting component, an organic electroluminescent element that emits white light with high luminance and excellent durability can be provided. Specific examples of the compound A according to the present invention include, for example, the following compounds (Chemical Formulas 6 to 22), but the present invention is not limited thereto.

[0017]

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[0018]

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[0019]

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[0020]

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[0021]

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[0022]

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[0023]

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[0024]

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[0025]

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[0026]

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[0027]

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[0028]

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[0029]

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[0030]

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[0031]

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[0032]

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[0033]

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The compound A according to the present invention, for example, the compound represented by the general formula (1-A) can be produced, for example, by the following method. That is, for example, a compound represented by the general formula (2) (Formula 23) is converted to an oxidizing agent (eg, aluminum chloride / cupric chloride, aluminum chloride / sodium chloride, cobalt trifluoride, thallium trifluoroacetate, The reaction is performed in the presence of lead acetate or ferric chloride to close the ring [for example, J. Amer. Chem. Soc., 10
2 , 6504 (1980) and Chem. Rev., 87 , 357 (1987) can be referred to].

[0035]

Embedded image [In the above formula, X _{1 to} X ₂₂ represent the same meaning as in the case of the general formula (1-A)]

The compound represented by the general formula (2) is, for example, a boric acid compound represented by the general formula (3) (formula 24) and the general formula (4) (formula 24), 5) (Chemical 2)
4) a dihalogenoacenaphtho [1,2-k] fluoranthene derivative and a palladium compound [for example,
Tetrakis (triphenylphosphine) palladium,
Bis (triphenylphosphine) palladium chloride] and a base (eg, sodium carbonate, sodium hydrogen carbonate, triethylamine) [see, for example, the method described in Chem. Rev., 95 , 2457 (1995). Can be produced].

[0037]

Embedded image [In the above formula, X _{1 to} X ₂₂ represent the same meaning as in the case of the general formula (1-A), and Z ₁ and Z ₂ represent a halogen atom.] In the general formula (5), Z ₁ and Z ₂ Represents a halogen atom, and preferably represents a chlorine atom, a bromine atom or an iodine atom.

The compounds represented by the general formulas (3) and (4) are, for example, each represented by the general formula (6)
From the compounds represented by 5) and the general formula (7) (Formula 25), for example, n-butyllithium, a lithio compound or a Grignard reagent which can be adjusted by the action of magnesium metal, for example, trimethoxyboron, triisopropoxy It can be adjusted by boron or the like [for example,
Chem. Rev., 95 , 2457 (1995) can be referred to].

[0039]

Embedded image [In the above formula, X _{1 to} X ₆ and X _{12 to} X ₁₇ are represented by the general formula (1-
A represents the same meaning as in the case of A), and Z ₃ and Z ₄ represent a halogen atom.] In the general formulas (6) and (7), Z ₃ and Z ₄ represent a halogen atom, and preferably a chlorine atom , A bromine atom or an iodine atom.

The compound represented by the general formula (5) can be obtained, for example, by reacting a 3-halogenocyclopenta [a] acenaphthylene-8-one derivative with a 5-halogenoacenaphthylene derivative, followed by dehydrogenation [ For example, as a dehydrogenating agent, chloranil, 2,3-dichloro-5,6-dicyano-1,
Using 4-benzoquinone (DDQ)] [for example, Angew. Chem. In
t. Ed. Engl., 30 , 172 (1991) can be referred to].

The compound A according to the present invention may be produced in the form of a solvation with a solvent (for example, an aromatic hydrocarbon solvent such as toluene) used in some cases. The compound A according to the present invention includes such a solvate. Needless to say, a non-solvate containing no solvent is also included. In the organic electroluminescent device of the present invention, not only a non-solvate of the compound A according to the present invention but also such a solvate can be used. When the compound A according to the present invention is used in an organic electroluminescent device, a recrystallization method, a column chromatography method,
It is preferable to use a purification method such as a sublimation purification method, or a compound having an increased purity by using these methods in combination.

The organic electroluminescent device generally has at least one light-emitting layer containing at least one light-emitting component sandwiched between a pair of electrodes. In consideration of the functional levels of hole injection and hole transport, electron injection and electron transport of the compound used in the light emitting layer, a hole injection transport layer containing a hole injection transport component and / or An electron injection / transport layer containing an injection / transport component can also be provided. For example, when the compound used for the light emitting layer has a good hole injection function, a hole transport function and / or an electron injection function, and an electron transport function, the light emitting layer is formed of the hole injection transport layer and / or the electron injection transport layer. The element can also be configured to serve as Needless to say, depending on the case, a structure of a device (single-layer device) in which both the hole injection transport layer and the electron injection transport layer are not provided may be employed. Also,
Each of the hole injecting and transporting layer, the electron injecting and transporting layer, and the light emitting layer may have a single-layer structure or a multilayer structure, and the hole injecting and transporting layer and the electron injecting and transporting layer may have respective structures. In the layer, a layer having an injection function and a layer having a transport function may be separately provided.

In the organic electroluminescent device of the present invention, the compound A according to the present invention is preferably used for a hole injection / transport component, a light emitting component or an electron injection / transport component, and is preferably used for a hole injection / transport component or a light emitting component. Is more preferable,
It is particularly preferable to use it for a light emitting component. In the organic electroluminescent device of the present invention, the compound A according to the present invention may be used alone or in combination.

The structure of the organic electroluminescent device of the present invention is not particularly limited.
(B) anode / hole injection / transport layer / light emitting layer / cathode device (FIG. 2), (C) anode / light emission Layer / electron injection / transport layer / cathode device (FIG. 3), (D) anode / light-emitting layer / cathode device (FIG. 4), and the like. Further, the device is a device of a type in which a light emitting layer is sandwiched between electron injection transport layers (E).
Anode / hole injection / transport layer / electron injection / transport layer / emission layer / electron injection / transport layer / cathode device (FIG. 5).
The element configuration of the (D) type includes an element of a type in which a light-emitting component is sandwiched between a pair of electrodes in a single layer form. Further, for example, (F) a hole injection / transport component, (FIG. 6), and a pair of electrodes in the form of a single layer in which the hole injection / transport component and the light emitting component are mixed. There is an element of the type sandwiched between (FIG. 7) and (H) an element of the type sandwiched between a pair of electrodes (FIG. 8) in the form of a single layer in which a light emitting component and an electron injection transport component are mixed.

The organic electroluminescent device of the present invention is not limited to these device configurations, but may be provided with a plurality of hole injection / transport layers, light emitting layers, and electron injection / transport layers in each type of device. Can be. In each type of device, between the hole injection transport layer and the light emitting layer,
A mixed layer of a light emitting component and an electron injecting and transporting component may be provided between the light emitting layer and the electron injecting and transporting layer. More preferred configurations of the organic electroluminescent element include (A) type element, (B) type element, (C) type element, (E) type element, (F) type element,
(G) type element or (H) type element, more preferably (A) type element, (B) type element, (C) type element,
(F) type element or (H) type element.

As the organic electroluminescent device of the present invention, for example, (A) anode / hole injection / transport layer / light emitting layer / electron injection / transport layer / cathode device shown in FIG. 1 will be described.
In FIG. 1, 1 is a substrate, 2 is an anode, 3 is a hole injection / transport layer, 4 is a light emitting layer, 5 is an electron injection / transport layer, 6 is a cathode,
Reference numeral 7 denotes a power supply.

The electroluminescent device of the present invention is preferably supported on a substrate 1. The substrate is not particularly limited, but is preferably transparent or translucent. Plastic sheets (eg, sheets of polyester, polycarbonate, polysulfone, polymethyl methacrylate, polypropylene, polyethylene, etc.), translucent plastic sheets,
Examples thereof include quartz, transparent ceramics, and a composite sheet obtained by combining these. Further, on the substrate, for example, a color filter film, a color conversion film,
Emission color can also be controlled by combining dielectric reflection films.

As the anode 2, it is preferable to use a metal, an alloy or an electrically conductive compound having a relatively large work function as an electrode material. As the electrode material used for the anode, for example, gold, platinum, silver, copper, cobalt, nickel,
Palladium, vanadium, tungsten, tin oxide, zinc oxide, ITO (indium tin oxide), polythiophene, polypyrrole, and the like can be given. These electrode substances may be used alone or in combination of two or more. The anode can be formed on a substrate by using such an electrode material by a method such as an evaporation method or a sputtering method. Further, the anode may have a single-layer structure or a multilayer structure. The sheet electric resistance of the anode is preferably several hundred Ω.
/ □ or less, more preferably about 5 to 50Ω / □. The thickness of the anode depends on the material of the electrode substance used, but is generally about 5 to 1000 nm, more preferably,
It is set to about 10 to 500 nm.

The hole injection / transport layer 3 is a layer containing a compound having a function of facilitating the injection of holes (holes) from the anode and a function of transporting the injected holes. The hole injecting and transporting layer is formed of the compound A according to the present invention and / or another compound having a hole injecting and transporting function (for example, phthalocyanine derivative, triarylmethane derivative, triarylamine derivative, oxazole derivative, hydrazone derivative, stilbene derivative) , Pyrazoline derivatives, polysilane derivatives, polyphenylenevinylene and its derivatives,
Polythiophene and a derivative thereof, a poly-N-vinylcarbazole derivative, or the like). The compounds having a hole injection / transport function may be used alone or in combination.

Other compounds having a hole injection / transport function used in the present invention include triarylamine derivatives (for example, 4,4′-bis [N-phenyl-N- (4 ″)).
-Methylphenyl) amino] biphenyl, 4,4'-bis [N-phenyl-N- (3 "-methylphenyl) amino] biphenyl, 4,4'-bis [N-phenyl-N-
(3 ″ -methoxyphenyl) amino] biphenyl, 4,
4'-bis [N-phenyl-N- (1 "-naphthyl) amino] biphenyl, 3,3'-dimethyl-4,4'-bis [N-phenyl-N- (3" -methylphenyl) Amino] biphenyl, 1,1-bis [4 ′-[N, N-di (4 ″ -methylphenyl) amino] phenyl] cyclohexane, 9,10-bis [N- (4′-methylphenyl) -N -(4 "-n-butylphenyl) amino] phenanthrene, 3,8-bis (N, N-diphenylamino) -6-phenylphenanthridine, 4-methyl-
N, N-bis [4 ″, 4 ′ ″-bis [N ′, N′-di (4-methylphenyl) amino] biphenyl-4-yl] aniline, N, N′-bis [4- ( Diphenylamino) phenyl] -N, N'-diphenyl-1,3-diaminobenzene, N, N'-bis [4- (diphenylamino) phenyl] -N, N'-diphenyl-1,4-diaminobenzene, 5,5 ″ -bis [4- (bis [4-methylphenyl] amino) phenyl] -2,2 ′: 5 ′,
2 ″ -terthiophene, 1,3,5-tris (diphenylamino) benzene, 4,4 ′, 4 ″ -tris (N-carbazolyyl) triphenylamine, 4,4 ′, 4 ″-
Tris [N- (3 ′ ″-methylphenyl) -N-phenylamino] triphenylamine, 4,4 ′, 4 ″ -tris [N, N-bis (4 ′ ″-tert-butylbiphenyl-
4 ""-yl) amino] triphenylamine, 1,3
5-tris [N- (4'-diphenylaminophenyl)
-N-phenylamino] benzene), polythiophene and derivatives thereof, and poly-N-vinylcarbazole derivatives are preferred. When the compound A according to the present invention is used in combination with another compound having a hole injecting and transporting function, the proportion of the compound A according to the present invention in the hole injecting and transporting layer is preferably 0.1 to 40% by weight. Prepare to about.

The light emitting layer 4 has a hole and electron injection function,
This is a layer containing a compound having a transport function thereof and a function of generating excitons by recombination of holes and electrons. The light-emitting layer is formed of the compound A according to the present invention and / or another compound having a light-emitting function (eg, an acridone derivative, a quinacridone derivative, a diketopyrrolopyrrole derivative, a polycyclic aromatic compound [eg, rubrene, anthracene, tetracene, pyrene , Perylene, chrysene, decacyclene, coronene, tetraphenylcyclopentadiene, pentaphenylcyclohexadiene, 9,10-diphenylanthracene, 9,10-bis (phenylethynyl) anthracene, 1,4-bis (9'-ethynylanthracenyl) ) Benzene, 4,4′-bis (9 ″ -ethynylanthracenyl) biphenyl], triarylamine derivatives [for example, the compounds described above as compounds having a hole injecting and transporting function], and organic metals Complexes [for example, tris (8-quino Relate) aluminum, bis (10-benzo [h] quinolinolato) beryllium, 2-
Zinc salt of (2′-hydroxyphenyl) benzoxazole, zinc salt of 2- (2′-hydroxyphenyl) benzothiazole, zinc salt of 4-hydroxyacridine,
Zinc salt of hydroxyflavone, beryllium salt of 5-hydroxyflavone, aluminum salt of 5-hydroxyflavone], stilbene derivatives {eg, 1,1,4,4
-Tetraphenyl-1,3-butadiene, 4,4'-bis (2,2-diphenylvinyl) biphenyl, 4,4 '
-Bis [(1,1,2-triphenyl) ethenyl] biphenyl},

Coumarin derivatives [for example, coumarin 1, coumarin 6, coumarin 7, coumarin 30, coumarin 10
6, Coumarin 138, Coumarin 151, Coumarin 15
2, Coumarin 153, Coumarin 307, Coumarin 31
1. Coumarin 314, Coumarin 334, Coumarin 33
8, coumarin 343, coumarin 500], pyran derivatives [eg, DCM1, DCM2], oxazone derivatives [eg, Nile Red], benzothiazole derivatives,
Benzoxazole derivatives, benzimidazole derivatives, pyrazine derivatives, cinnamate derivatives, poly-
N-vinyl carbazole and its derivatives, polythiophene and its derivatives, polyphenylene and its derivatives, polyfluorene and its derivatives, polyphenylene vinylene and its derivatives, polybiphenylene vinylene and its derivatives, polyterphenylene vinylene and its derivatives, polynaphthylene vinylene and Derivatives, polythienylenevinylene and derivatives thereof).

In the organic electroluminescent device of the present invention, the light emitting layer preferably contains the compound A of the present invention. When the compound A according to the present invention and a compound having another light-emitting function are used in combination, the ratio of the compound A according to the present invention in the light-emitting layer is preferably 0.001 to 99.99.
About 9% by weight, more preferably 0.01 to 99.99
% By weight, more preferably about 0.1 to 99.9% by weight.

As another compound having a light emitting function used in the present invention, a light emitting organic metal complex is preferable. For example, J. Appl. Phys., 65 , 3610 (1989);
As described in Japanese Patent No. 214332, the light emitting layer may be composed of a host compound and a guest compound (dopant). A light-emitting layer can be formed using the compound A according to the present invention as a host compound, and further, a light-emitting layer can be formed using a guest compound. When the light-emitting layer is formed using the compound A according to the present invention as a guest compound, examples of the host compound include the compounds having the other light-emitting functions described above. Reelamine is more preferred. In this case, the compound A according to the present invention is preferably used in an amount of about 0.001 to 40% by weight, more preferably about 0.01 to 30% by weight, based on the luminescent organometallic complex or the triarylamine derivative. Particularly preferably, about 0.1 to 20% by weight is used.

The light-emitting organometallic complex used in combination with the compound A according to the present invention is not particularly limited, but a light-emitting organic aluminum complex is preferable, and a light-emitting having a substituted or unsubstituted 8-quinolinolate ligand. Organic aluminum complexes are more preferred. Preferred luminescent organic metal complexes include, for example, luminescent organic aluminum complexes represented by general formulas (a) to (c). (Q) _3- Al (a) (wherein Q represents a substituted or unsubstituted 8-quinolinolate ligand) (Q) _2- Al-OL (b) (wherein Q represents substituted 8 -Represents a quinolinolate ligand, O
-L is a phenolate ligand, and L represents a hydrocarbon group having 6 to 24 carbon atoms including a phenyl moiety.) (Q) ₂ -Al-O-Al- (Q) ₂ (c) Q represents a substituted 8-quinolinolate ligand)

Specific examples of the luminescent organometallic complex include, for example, tris (8-quinolinolate) aluminum, tris (4-methyl-8-quinolinolate) aluminum, tris (5-methyl-8-quinolinolate) aluminum, tris ( 3,4-dimethyl-8-quinolinolate) aluminum, tris (4,5-dimethyl-8-quinolinolate) aluminum, tris (4,6-dimethyl-8-quinolinolate) aluminum,

Bis (2-methyl-8-quinolinolate)
(Phenolate) aluminum, bis (2-methyl-8)
-Quinolinolate) (2-methylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (3
-Methylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (4-methylphenolate)
Aluminum, bis (2-methyl-8-quinolinolate) (2-phenylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (3-phenylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (4-phenylphenolato) aluminum, bis (2-methyl-8-quinolinolate) (2
3-dimethylphenolate) aluminum, bis (2-
Methyl-8-quinolinolate) (2,6-dimethylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (3,4-dimethylphenolate) aluminum, bis (2-methyl-8-quinolinolate)
(3,5-dimethylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (3,5-di-te
rt-butylphenolato) aluminum, bis (2-methyl-8-quinolinolate) (2,6-diphenylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (2,4,6-triphenylphenolate) ) Aluminum, bis (2-methyl-8-quinolinolate) (2,4,6-trimethylphenolate) aluminum, bis (2-methyl-8-quinolinolate)
(2,4,5,6-tetramethylphenolate) aluminum, bis (2-methyl-8-quinolinolate) (1
-Naphtholate) aluminum, bis (2-methyl-8)
-Quinolinolate) (2-naphtholate) aluminum, bis (2,4-dimethyl-8-quinolinolate)
(2-phenylphenolato) aluminum, bis (2,4-dimethyl-8-quinolinolate) (3-phenylphenolato) aluminum, bis (2,4-dimethyl-8-quinolinolate) (4-phenylphenolato) aluminum , Bis (2,4-dimethyl-8-quinolinolate) (3,5-dimethylphenylphenolate) aluminum, bis (2,4-dimethyl-8-quinolinolate) (3,5-di-tert-butylphenylphenolate) )aluminum,

Bis (2-methyl-8-quinolinolate)
Aluminum-μ-oxo-bis (2-methyl-8-quinolinolato) aluminum, bis (2,4-dimethyl-8-quinolinolato) aluminum-μ-oxo-bis (2,4-dimethyl-8-quinolinolato) aluminum, Bis (2-methyl-4-ethyl-8-quinolinolato) aluminum-μ-oxo-bis (2-methyl-
4-ethyl-8-quinolinolate) aluminum, bis (2-methyl-4-methoxy-8-quinolinolate) aluminum-μ-oxo-bis (2-methyl-4-methoxy-8-quinolinolate) aluminum, bis (2-
Methyl-5-cyano-8-quinolinolato) aluminum-μ-oxo-bis (2-methyl-5-cyano-8-
Quinolinolate) aluminum, bis (2-methyl-5)
-Trifluoromethyl-8-quinolinolato) aluminum-μ-oxo-bis (2-methyl-5-trifluoromethyl-8-quinolinolato) aluminum. Of course, the luminescent organometallic complex may be used alone or in combination.

The electron injection / transport layer 5 is a layer containing a compound having a function of facilitating the injection of electrons from the cathode and a function of transporting the injected electrons. The electron injecting / transporting layer is formed of the compound A according to the present invention and / or another compound having an electron injecting / transporting function (eg, an organometallic complex [eg, tris (8-quinolinolate) aluminum, bis (10-benzo [h] quinolinolate) ) Beryllium, 5
Beryllium salt of -hydroxyflavone, aluminum salt of 5-hydroxyflavone], oxadiazole derivative [for example, 1,3-bis [5 ′-(p-tert-butylphenyl) -1,3,4-oxadiazole] -2'-yl] benzene], a triazole derivative [eg, 3-
(4′-tert-butylphenyl) -4-phenyl-5-
(4 "-biphenyl) -1,2,4-triazole],
Triazine derivatives, perylene derivatives, quinoline derivatives,
Quinoxaline derivative, diphenylquinone derivative, nitro-substituted fluorenone derivative, thiopyrandioxide derivative, etc.). When the compound A according to the present invention and another compound having an electron injecting and transporting function are used in combination, the proportion of the compound A according to the present invention in the electron injecting and transporting layer is preferably from 0.1 to 0.1.
It is adjusted to about 40% by weight. In the present invention, the compound A according to the present invention and an organometallic complex [for example, the compounds represented by the general formulas (a) to (c)] are used in combination,
It is preferable to form an electron injection transport layer.

As the cathode 6, it is preferable to use a metal, an alloy or an electrically conductive compound having a relatively small work function as an electrode material. Examples of the electrode material used for the cathode include lithium, lithium-indium alloy, sodium, sodium-potassium alloy, calcium, magnesium, magnesium-silver alloy, magnesium-indium alloy, indium, ruthenium, titanium,
Manganese, yttrium, aluminum, an aluminum-lithium alloy, an aluminum-calcium alloy, an aluminum-magnesium alloy, a graphite thin film, and the like can be given. These electrode substances may be used alone or in combination. The cathode is
Using these electrode substances, for example, a vapor deposition method, a sputtering method, an ionization vapor deposition method, an ion plating method,
It can be formed on the electron injection transport layer by a method such as a cluster ion beam method. Further, the cathode may have a single-layer structure or a multilayer structure. Note that the sheet electric resistance of the cathode is preferably set to several hundred Ω / □ or less. The thickness of the cathode depends on the material of the electrode substance used, but is generally about 5 to 1000 nm,
More preferably, it is set to about 10 to 500 nm.
In order to efficiently extract the light emitted from the organic electroluminescent device, it is preferable that at least one of the anode and the cathode is transparent or translucent, and the transmittance of the emitted light is generally 70% or more. It is more preferable to set the material and thickness of the anode.

The organic electroluminescent device of the present invention may contain a singlet oxygen quencher in at least one layer. The singlet oxygen quencher is not particularly limited and includes, for example, rubrene,
Nickel complexes, diphenylisobenzofuran and the like can be mentioned, and rubrene is particularly preferable. The layer containing the singlet oxygen quencher is not particularly limited, but is preferably a light emitting layer or a hole injection transport layer, and more preferably a hole injection transport layer.
For example, when a singlet quencher is contained in the hole injecting and transporting layer, the singlet quencher may be contained uniformly in the hole injecting and transporting layer.
(An electron injection / transport layer having a light emitting function). The content of the singlet oxygen quencher is 0.01 to 50% by weight, preferably 0.05 to 3% by weight of the total amount of the contained layer (for example, the hole injection transport layer).
0% by weight, more preferably 0.1 to 20% by weight.

The method for forming the hole injecting and transporting layer, the light emitting layer, and the electron injecting and transporting layer is not particularly limited. Method, dip coating method,
It can be formed by forming a thin film by a bar coating method, a roll coating method, a Langmuir-Brosette method, an inkjet method, or the like. By vacuum evaporation method,
In the case of forming each layer, the conditions of vacuum deposition are not particularly limited.
Boat temperature of about 00 ° C (deposition source temperature), -50 to 30
It is preferable to perform the deposition at a substrate temperature of about 0 ° C. and at a deposition rate of about 0.005 to 50 nm / sec. In this case, each layer such as a hole injection transport layer, a light emitting layer, and an electron injection transport layer,
By continuously forming the organic electroluminescent element under vacuum, an organic electroluminescent device having more excellent various characteristics can be manufactured. When each layer such as a hole injection transport layer, a light emitting layer, and an electron injection transport layer is formed using a plurality of compounds by a vacuum evaporation method,
It is preferred that the temperature of each boat containing the compound be individually controlled and co-evaporated.

When each layer is formed by a solution coating method,
The components forming each layer or the components and the binder resin are dissolved or dispersed in a solvent to form a coating solution. Examples of the binder resin that can be used for each of the hole injection transport layer, the light emitting layer, and the electron injection transport layer include poly-N-vinylcarbazole, polyarylate, polystyrene, polyester, polysiloxane, polymethyl acrylate, and polymethyl methacrylate. , Polyether, polycarbonate, polyamide, polyimide, polyamideimide, polyparaxylene, polyethylene, polyphenylene oxide, polyethersulfone, polyaniline and its derivatives, polythiophene and its derivatives, polyphenylenevinylene and its derivatives, polyfluorene and its derivatives, polythienyl And high molecular compounds such as lenvinylene and derivatives thereof. The binder resin may be used alone or in combination of two or more. When each layer is formed by a solution coating method, a component forming each layer or the component and a binder resin are mixed with a suitable organic solvent (for example, hexane, octane, decane,
Toluene, xylene, ethylbenzene, hydrocarbon solvents such as 1-methylnaphthalene, for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, ketone solvents such as cyclohexanone, for example, dichloromethane,
Chloroform, tetrachloromethane, dichloroethane,
Halogenated hydrocarbon solvents such as trichloroethane, tetrachloroethane, chlorobenzene, dichlorobenzene, chlorotoluene, for example, ethyl acetate, butyl acetate,
Ester solvents such as amyl acetate, for example, methanol, propanol, butanol, pentanol, hexanol, cyclohexanol, methyl cellosolve, ethyl cellosolve, alcohol solvents such as ethylene glycol, for example, dibutyl ether, tetrahydrofuran, dioxane, anisole and the like Ether solvents such as polar solvents such as N, N-dimethylformamide, N, N-dimethylacetamide, 1-methyl-2-pyrrolidone, 1-methyl-2-imidazolidinone, dimethylsulfoxide) and / or Alternatively, a thin film can be formed by various coating methods by dissolving or dispersing in water to form a coating solution.

The method of dispersion is not particularly limited. For example, the particles can be dispersed in fine particles using a ball mill, a sand mill, a paint shaker, an attritor, a homogenizer, or the like. The concentration of the coating solution is not particularly limited, and can be set to a concentration range suitable for forming a desired thickness depending on a coating method to be performed, and is generally about 0.1 to 50% by weight. Preferably, the solution concentration is about 1 to 30% by weight. When a binder resin is used, the amount of the binder resin is not particularly limited, but is generally relative to the components forming each layer (when forming a single-layer device, the total amount of each component is 5) to 99.9% by weight
Degree, preferably about 10 to 99.9% by weight, more preferably about 15 to 90% by weight.

The thicknesses of the hole injecting and transporting layer, the light emitting layer and the electron injecting and transporting layer are not particularly limited, but are generally preferably set to about 5 nm to 5 μm.
A protective layer (sealing layer) may be provided on the manufactured device for the purpose of preventing contact with oxygen or moisture, or the device may be formed of, for example, paraffin, liquid paraffin, silicon oil, fluorocarbon oil, zeolite, or the like. It can be protected by being enclosed in an inert substance such as a contained fluorocarbon oil. Examples of the material used for the protective layer include organic polymer materials (for example, fluorinated resin, epoxy resin, silicone resin, epoxy silicone resin, polystyrene, polyester, polycarbonate, polyamide, polyimide, polyamideimide, polyparaxylene, polyethylene) , Polyphenylene oxide), inorganic materials (for example, diamond thin film, amorphous silica, electrically insulating glass, metal oxide, metal nitride, metal carbide,
Metal sulfide), and a photocurable resin. The material used for the protective layer may be used alone or in combination of two or more. The protective layer may have a single-layer structure or a multilayer structure.

Further, for example, a metal oxide film (for example, aluminum oxide film) or a metal fluoride film can be provided as a protective layer on the electrode. Also, for example, on the surface of the anode,
For example, an interface layer (intermediate layer) composed of an organic phosphorus compound, polysilane, an aromatic amine derivative, and a phthalocyanine derivative
Can also be provided. Further, electrodes, eg, anodes, can be used by treating the surface with, eg, acid, ammonia / hydrogen peroxide, or plasma.

The organic electroluminescent device of the present invention is generally used as a DC-driven device, but can also be used as a pulse-driven or AC-driven device.
The applied voltage is generally about 2 to 30V. The organic electroluminescent device of the present invention can be used for, for example, a panel light source, various light emitting devices, various display devices, various labels, various sensors, and the like.

[0068]

EXAMPLES The present invention will be described below in more detail with reference to Production Examples and Examples, but it should be understood that the present invention is not limited by these. Production Example 1 Production of Compound of Exemplified Compound A-1 5.79 g of 3,11-di (1′-naphthyl) acenaphtho [1,2-k] fluoranthene and 11.59 of cobalt trifluoride
g was stirred in 100 ml of trifluoroacetic acid at room temperature for 5 hours. After adding 500 ml of water, the precipitated crystals were collected by filtration and washed with water. The crystals were subjected to silica gel column chromatography (eluent: toluene). After distilling off toluene under reduced pressure, the residue was recrystallized from a mixed solvent of toluene and acetone to obtain 3.42 g of a compound of Exemplified Compound A-1 as purple crystals. Mass spec: m / z = 574 Melting point: 250 ° C. or more This compound sublimated under the conditions of 500 ° C. and 10 ⁻⁵ Torr. Absorption maximum (in toluene) 595 nm

The 3,11-di (1′-naphthyl) acenaphtho [1,2-k] fluoranthene used was produced by the following method. 3,11-dibromoacenaphtho [1,2
-k] fluoranthene 9.68 g, 1-naphthyl boric acid 5.69 g, sodium carbonate 8.48 g and tetrakis (triphenylphosphine) palladium 1.38 g
Was refluxed in toluene (100 ml) and water (50 ml) for 5 hours. After the toluene was distilled off from the reaction mixture, the precipitated solid was filtered. This solid was subjected to silica gel column chromatography (eluent: toluene). After the toluene was distilled off under reduced pressure, the residue was recrystallized with a mixed solvent of toluene and acetone, and 8.46 g of 3,11-di (1′-naphthyl) acenaphtho [1,2-k] fluoranthene as yellow crystals. Obtained.

Production Examples 2 to 32 In Production Example 1, instead of using 3,11-di (1′-naphthyl) acenaphtho [1,2-k] fluoranthene,
Various 3,11-di (1′-naphthyl) acenaphtho [1,2
-k] Production Example 1 except that a fluoranthene derivative was used
Various s-indaceno [1,2,3-c
d: 5,6,7-c'd '] diperylene derivative. Table 1 (Tables 1 to 5) shows the 3,11-di (1′-naphthyl) acenaphtho [1,2-k] fluoranthene derivative used and the s-indaceno [1,2,3-cd] produced. : 5,6,7-c'd '] diperylene derivatives are shown by way of example compound numbers. The maximum absorption (nm) in toluene is also shown. The produced compounds were purple crystals, and the melting points of those compounds were 250 ° C. or higher.

[0071]

[Table 1]

[0072]

[Table 2]

[0073]

[Table 3]

[0074]

[Table 4]

[0075]

[Table 5]

Example 1 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Then, on top of this, bis (2-methyl-8-quinolinolate) (4-phenylphenolate) aluminum and s-indaceno [1,2,3-cd:
5,6,7-c'd '] diperylene (compound of Exemplified Compound No. A-1) was obtained from different evaporation sources at an evaporation rate of 0.2 nm / sec.
Co-deposition to a thickness of 50 nm (weight ratio 100: 0.5)
Thus, a light emitting layer was obtained. Next, tris (8-quinolinolato) aluminum is deposited at a deposition rate of 0.2 nm / sec.
It was deposited to a thickness of nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 55 mA / cm ² flowed. Brightness 2
Red light emission of 420 cd / m ² was confirmed.

Examples 2 to 32 In Example 1, instead of using the compound of Exemplified Compound A-1 in forming the light emitting layer, Exemplified Compound No. A
-2 (Example 2), Exemplified Compound No. A-4 (Example 3), Exemplified Compound No. A-5 (Example 4), Exemplified Compound No. A-8 (Example 5) ), Compound of Exemplified Compound No. A-10 (Example 6),
Compound of Exemplified Compound No. A-11 (Example 7), Compound of Exemplified Compound No. A-13 (Example 8), Compound of Exemplified Compound No. A-15 (Example 9), Exemplified Compound No. B-
Compound No. 2 (Example 10), Compound No. B-4 (Example 11), Compound No. B-9 (Example 12), Compound No. C-1 (Example 13) Compound of Exemplified Compound No. C-4 (Example 1)
4), Compound of Exemplified Compound No. C-5 (Example 15),
Compound of Exemplified Compound No. C-8 (Example 16), Compound of Exemplified Compound No. C-10 (Example 17), Compound of Exemplified Compound No. C-13 (Example 18), Compound of Exemplified Compound No. C-15 (Example 19), Exemplified Compound No. D-
Compound No. 1 (Example 20), Compound No. D-2 (Example 21), Compound No. D-6 (Example 22), Compound No. D-8 (Example 23) Compound of Exemplified Compound No. D-10 (Example 2)
4), Compound of Exemplified Compound No. D-12 (Example 2)
5), Compound of Exemplified Compound No. D-15 (Example 2)
6), Compound of Exemplified Compound No. D-17 (Example 2)
7), Compound of Exemplified Compound No. E-1 (Example 28),
Compound of Exemplified Compound No. E-2 (Example 29), Compound of Exemplified Compound No. E-4 (Example 30), Compound of Exemplified Compound No. E-6 (Example 31), Exemplified Compound No. E-
Example 1 except that the compound of Example 7 (Example 32) was used.
An organic electroluminescent device was produced by the method described in (1). When a DC voltage of 12 V was applied to each element under a dry atmosphere, orange-red to red light emission was confirmed. The characteristics were further examined, and the results are shown in Table 2 (Tables 6 and 7).

Comparative Example 1 In Example 1, when forming the light emitting layer, the compound of Exemplified Compound No. A-1 was not used, and bis (2-methyl-
An organic electroluminescent device was prepared by the method described in Example 1, except that only 8-quinolinolate) (4-phenylphenolate) aluminum was used to form a light emitting layer by vapor deposition to a thickness of 50 nm. 1
When a DC voltage of 2 V was applied, blue light emission was confirmed. The characteristics were further examined, and the results are shown in Table 2.

Comparative Example 2 In Example 1, when forming the light emitting layer, instead of using the compound of Exemplified Compound No. A-1, N-methyl-
An organic electroluminescent device was produced by the method described in Example 1 except that 2-methoxyacridone was used. When a DC voltage of 12 V was applied to this device under a dry atmosphere, blue light emission was confirmed. Further investigate its characteristics,
The results are shown in Table 2.

[0080]

[Table 6]

[0081]

[Table 7]

Example 33 A glass substrate having an ITO transparent electrode (anode) having a thickness of 200 nm was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, bis (2-methyl-8-quinolinolate) (4-phenylphenolate) aluminum and the compound of Exemplified Compound No. A-4 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2 nm / sec.
Co-deposition to a thickness of 50 nm (weight ratio 100: 1.0)
Thus, a light emitting layer was obtained. Next, tris (8-quinolinolato) aluminum is deposited at a deposition rate of 0.2 nm / sec.
It was deposited to a thickness of nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed. Brightness 2
Red light emission of 420 cd / m ² was confirmed.

Example 34 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Then, on top of this, bis (2-methyl-8-quinolinolate) aluminum-μ
-Oxo-bis (2-methyl-8-quinolinolato) aluminum and the compound of Exemplified Compound No. A-8 were co-deposited from different deposition sources at a deposition rate of 0.2 nm / sec to a thickness of 50 nm (weight ratio: 100: 2.0) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further, magnesium and silver were co-deposited thereon at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device under a dry atmosphere,
A current of mA / cm ² flowed. Brightness 2360 cd / m ²
Red light emission was confirmed.

Example 35 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Then, on this, bis (2,4-dimethyl-8-quinolinolato) aluminum-μ-oxo-bis (2,4-dimethyl-8-quinolinolato) aluminum and the compound of Exemplified Compound No. A-11 were deposited by different vapor deposition. From source, deposition rate 0.2nm / sec
Co-deposition to a thickness of 50 nm (weight ratio 100: 4.0)
Thus, a light emitting layer was obtained. Next, tris (8-quinolinolato) aluminum is deposited at a deposition rate of 0.2 nm / sec.
It was deposited to a thickness of nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 53 mA / cm ² flowed. Brightness 2
Red light emission of 220 cd / m ² was confirmed.

Example 36 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolate) aluminum and the compound of Exemplified Compound No. A-13 were further deposited thereon from different evaporation sources at an evaporation rate of 0,1.
Co-deposition to a thickness of 50 nm at 2 nm / sec (weight ratio 10
0: 6.0) to obtain a light emitting layer. Next, tris (8-quinolinolate) aluminum was deposited at a deposition rate of 0.2 nm /
The film was deposited to a thickness of 50 nm in sec to form an electron injection / transport layer. Further, magnesium and silver were further deposited thereon at a vapor deposition rate of 0.1 mm.
Co-deposition to a thickness of 200 nm at 2 nm / sec (weight ratio 1
0: 1) to form a cathode to produce an organic electroluminescent device.
In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank.
When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed. Red light emission with a luminance of 2280 cd / m ² was confirmed.

Example 37 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolate) aluminum and the compound of Exemplified Compound No. B-2 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
10) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further thereon, magnesium and silver were deposited at a deposition rate of 0.2 nm /
A co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm in sec to form an organic electroluminescent device as a cathode. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 58 mA / cm ² flowed.
Red light emission with a luminance of 2270 cd / m ² was confirmed.

Example 38 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolato) aluminum and the compound of Exemplified Compound No. C-4 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
1.0) to form a light-emitting layer also serving as an electron injection / transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm.
/ Sec to co-evaporate to a thickness of 200nm (weight ratio 10: 1)
This was used as a cathode to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed.
Red light emission with a luminance of 2420 cd / m ² was confirmed.

Example 39 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was ultrasonically cleaned with a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, bis (2-methyl-8-quinolinolate) (4-phenylphenolate) aluminum and the compound of Exemplified Compound No. C-10 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2 nm / se.
Co-deposition to a thickness of 50 nm with c (weight ratio 100: 1.0)
Thus, a light emitting layer was obtained. Next, tris (8-quinolinolato) aluminum is deposited at a deposition rate of 0.2 nm / sec.
It was deposited to a thickness of nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 58 mA / cm ² flowed. Brightness 2
Red light emission of 380 cd / m ² was confirmed.

Example 40 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Then, on top of this, bis (2-methyl-8-quinolinolate) aluminum-μ
-Oxo-bis (2-methyl-8-quinolinolate) aluminum and the compound of Exemplified Compound No. C-13 were co-deposited from different evaporation sources at a deposition rate of 0.2 nm / sec to a thickness of 50 nm (weight ratio: 100: 2.0) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further, magnesium and silver were co-deposited thereon at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the produced organic electroluminescent device in a dry atmosphere,
A current of mA / cm ² flowed. Brightness 2320 cd / m ²
Red light emission was confirmed.

Example 41 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, bis (2,4-dimethyl-8-quinolinolato) aluminum-μ-oxo-bis (2,4-dimethyl-8-quinolinolato) aluminum and the compound of Exemplified Compound No. D-1 were deposited thereon by different vapor deposition. From the source, co-deposit (weight ratio 100: 4.0) to a thickness of 50 nm at a deposition rate of 0.2 nm / sec,
It was a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
A cathode was formed by co-evaporation (weight ratio: 10: 1) to a thickness of 00 nm to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 58 mA / cm ² flowed. Brightness 220
Red light emission of 0 cd / m ² was confirmed.

Example 42 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolato) aluminum and the compound of Exemplified Compound No. D-6 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
6.0) to form a light emitting layer. Next, tris (8-quinolinolate) aluminum was deposited at a deposition rate of 0.2 nm / sec.
Was deposited to a thickness of 50 nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm.
/ Sec to co-evaporate to a thickness of 200nm (weight ratio 10: 1)
This was used as a cathode to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed.
Red light emission with a luminance of 2280 cd / m ² was confirmed.

Example 43 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolato) aluminum and the compound of Exemplified Compound No. D-8 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
10) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further thereon, magnesium and silver were deposited at a deposition rate of 0.2 nm /
A co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm in sec to form an organic electroluminescent device as a cathode. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed.
Red light emission with a luminance of 2320 cd / m ² was confirmed.

Example 44 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolate) aluminum and the compound of Exemplified Compound No. D-10 were further deposited thereon from different evaporation sources at an evaporation rate of 0.
Co-deposition to a thickness of 50 nm at 2 nm / sec (weight ratio 10
0: 1.0) to obtain a light-emitting layer also serving as an electron injection / transport layer. Further, magnesium and silver were further deposited thereon at a vapor deposition rate of 0.1 mm.
Co-deposition to a thickness of 200 nm at 2 nm / sec (weight ratio 1
0: 1) to form a cathode to produce an organic electroluminescent device.
In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank.
When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed. Red light emission with a luminance of 2320 cd / m ² was confirmed.

Example 45 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, bis (2-methyl-8-quinolinolate) (4-phenylphenolate) aluminum and the compound of Exemplified Compound No. E-1 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2 nm / sec.
Co-deposition to a thickness of 50 nm (weight ratio 100: 1.0)
Thus, a light emitting layer was obtained. Next, tris (8-quinolinolato) aluminum is deposited at a deposition rate of 0.2 nm / sec.
It was deposited to a thickness of nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 54 mA / cm ² flowed. Brightness 2
Red light emission of 320 cd / m ² was confirmed.

Example 46 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Then, on top of this, bis (2-methyl-8-quinolinolate) aluminum-μ
-Oxo-bis (2-methyl-8-quinolinolato) aluminum and the compound of Exemplified Compound No. E-2 were co-evaporated from different evaporation sources at a deposition rate of 0.2 nm / sec to a thickness of 50 nm (weight ratio 100: 2.0) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further, magnesium and silver were co-deposited thereon at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the produced organic electroluminescent device under a dry atmosphere, the voltage was 58%.
A current of mA / cm ² flowed. Brightness 2340 cd / m ²
Red light emission was confirmed.

Example 47 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, bis (2,4-dimethyl-8-quinolinolate) aluminum-μ-oxo-bis (2,4-dimethyl-8-quinolinolate) aluminum and the compound of Exemplified Compound No. E-4 were deposited thereon by different vapor deposition. From the source, co-deposit (weight ratio 100: 4.0) to a thickness of 50 nm at a deposition rate of 0.2 nm / sec,
It was a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
A cathode was formed by co-evaporation (weight ratio: 10: 1) to a thickness of 00 nm to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 56 mA / cm ² flowed. Brightness 233
Red light emission of 0 cd / m ² was confirmed.

Example 48 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolato) aluminum and the compound of Exemplified Compound No. E-7 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
6.0) to form a light emitting layer. Next, tris (8-quinolinolate) aluminum was deposited at a deposition rate of 0.2 nm / sec.
Was deposited to a thickness of 50 nm to form an electron injection transport layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm.
/ Sec to co-evaporate to a thickness of 200nm (weight ratio 10: 1)
This was used as a cathode to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 58 mA / cm ² flowed.
Red light emission with a luminance of 2380 cd / m ² was confirmed.

Example 49 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, tris (8-quinolinolato) aluminum and the compound of Exemplified Compound No. D-8 were further deposited thereon from different evaporation sources at an evaporation rate of 0.2.
Co-deposition to a thickness of 50 nm at nm / sec (weight ratio 100:
10) to form a light emitting layer. Next, tris (8-quinolinolato) aluminum was deposited at a deposition rate of 0.2 nm / sec to a thickness of 50 nm to form an electron injecting and transporting layer. Further thereon, magnesium and silver were deposited at a deposition rate of 0.2 nm /
A co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm in sec to form an organic electroluminescent device as a cathode. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 12 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 58 mA / cm ² flowed.
Red light emission with a luminance of 2270 cd / m ² was confirmed.

Example 50 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl was deposited on the ITO transparent electrode to a thickness of 75 nm at a deposition rate of 0.2 nm / sec. The hole injection transport layer was used. Next, the compound of Exemplified Compound No. D-10 was further deposited thereon at a deposition rate of 0.2 nm / se.
Evaporated to a thickness of 50 nm at c to obtain a light emitting layer. Then
On top of that, 1,3-bis [5 ′-(p-tert-butylphenyl) -1,3,4-oxadiazol-2′-yl] benzene was deposited at 50 nm at a deposition rate of 0.2 nm / sec.
To form an electron injecting and transporting layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
A cathode was formed by co-evaporation (weight ratio: 10: 1) to a thickness of 00 nm to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 14 V was applied to the manufactured organic electroluminescent device in a dry atmosphere, a current of 41 mA / cm ² flowed. Brightness 188
Red light emission of 0 cd / m ² was confirmed.

Example 51 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, the compound of Exemplified Compound No. E-1 was deposited on the ITO transparent electrode to a thickness of 55 nm at a deposition rate of 0.2 nm / sec to form a light emitting layer. Then, on top of that, 1,3-bis [5 ′-(p-tert-butylphenyl) -1,3,4-
[Oxadiazol-2'-yl] benzene was deposited at a deposition rate of 0.2 nm / sec to a thickness of 75 nm to form an electron injecting and transporting layer. Further, magnesium and silver were co-deposited thereon at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode, thereby producing an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 14 V was applied to the produced organic electroluminescent device under a dry atmosphere, the voltage was 63 mA / c.
m ² of current flowed. Red light emission with a luminance of 1450 cd / m ² was confirmed.

Example 52 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas, further washed with UV / ozone, fixed to a substrate holder of a vapor deposition device, and then the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr.
First, 4,4 ′, 4 ″ -tris [N- (3 ′ ″-methylphenyl) -N-phenylamino] triphenylamine was deposited on the ITO transparent electrode at a deposition rate of 0.1 nm / sec.
Then, it was deposited to a thickness of 50 nm to form a first hole injection transport layer. Then, 4,4'-bis [N-phenyl-N-
(1 ″ -naphthyl) amino] biphenyl and the compound of Exemplified Compound No. A-1 were obtained from different evaporation sources at a deposition rate of 0.1%.
Co-deposition to a thickness of 20 nm at 2 nm / sec (weight ratio 10
0: 5) to form a light-emitting layer also serving as a second hole injection / transport layer. Then, on top of this, tris (8-quinolinolate)
Aluminum is deposited at 50 nm at a deposition rate of 0.2 nm / sec.
To form an electron injecting and transporting layer. Further, magnesium and silver are further deposited thereon at a deposition rate of 0.2 nm / sec.
A cathode was formed by co-evaporation (weight ratio: 10: 1) to a thickness of 00 nm to produce an organic electroluminescent device. In addition, vapor deposition was performed while maintaining the reduced pressure state of the vapor deposition tank. When a DC voltage of 15 V was applied to the produced organic electroluminescent device in a dry atmosphere, a current of 64 mA / cm ² flowed. Brightness 264
Red light emission of 0 cd / m ² was confirmed.

Examples 53 to 74 In Example 52, instead of using the compound of Exemplified Compound A-1 in forming the light emitting layer, the compound of Exemplified Compound No. A-5 (Example 53) -8
(Example 54), the compound of Exemplified Compound No. A-13 (Example 55), the compound of Exemplified Compound No. B-2 (Example 56), the compound of Exemplified Compound No. B-9 (Example 57), Compound of Exemplified Compound No. C-1 (Example 5
8), Compound of Exemplified Compound No. C-4 (Example 59),
Compound of Exemplified Compound No. C-8 (Example 60), Compound of Exemplified Compound No. C-13 (Example 61), Compound of Exemplified Compound No. C-15 (Example 62), Compound of Exemplified Compound No. D-1 (Example 63), Exemplified Compound No. D-2
(Example 64), the compound of Exemplified Compound No. D-6 (Example 65), the compound of Exemplified Compound No. D-8 (Example 66), the compound of Exemplified Compound No. D-10 (Example 67), Compound of Exemplified Compound No. D-12 (Example 6
8), Compound of Exemplified Compound No. D-15 (Example 6)
9), Compound of Exemplified Compound No. D-17 (Example 7)
0), Compound of Exemplified Compound No. E-1 (Example 71),
Example 52 except that the compound of Exemplified Compound No. E-2 (Example 72), the compound of Exemplified Compound No. E-4 (Example 73), and the compound of Exemplified Compound No. E-7 (Example 74) were used. An organic electroluminescent device was produced by the method described in (1). When a DC voltage of 12 V was applied to each element under a dry atmosphere, orange-red to red light emission was confirmed.
The characteristics were further examined, and the results are shown in Table 3 (Table 8).

[0103]

[Table 8]

Example 75 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was ultrasonically cleaned using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas and further washed with UV / ozone. Next, poly-N-vinylcarbazole (weight average molecular weight 1
50,000), 1,1,4,4-tetraphenyl-1,
3-butadiene (blue light-emitting component), coumarin 6 ["3
-(2'-benzothiazolyl) -7-diethylaminocoumarin "(green light-emitting component)] and the compound of Exemplified Compound No. A-13 at a weight ratio of 100: 5: 3:
Using a 3% by weight dichloroethane solution containing 2 parts by weight, a 400 nm light emitting layer was formed by dip coating. Next, after fixing the glass substrate having the light emitting layer to a substrate holder of a vapor deposition apparatus, the vapor deposition tank was set to 3 × 10 ^−6.
The pressure was reduced to Torr. Further, on the light emitting layer, 3- (4 ′
-Tert-butylphenyl) -4-phenyl-5- (4 "
-Biphenyl) -1,2,4-triazole was deposited at a deposition rate of 0.2 nm / sec to a thickness of 20 nm, and tris (8-quinolinolate) aluminum was further deposited thereon at a deposition rate of 0.2 nm / sec. Was deposited to a thickness of 30 nm to form an electron injection transport layer. Further, magnesium and silver were co-deposited thereon at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode, thereby producing an organic electroluminescent device. In the manufactured organic electroluminescent element,
When a DC voltage of 12 V was applied in a dry atmosphere,
A current of 4 mA / cm ² flowed. Brightness 1160 cd / m
² was emitted.

Examples 76 to 84 In Example 75, instead of using the compound of Exemplified Compound No. A-13, the compound of Exemplified Compound No. A-15 (Example 76) and the compound of Exemplified Compound No. B-4 (Example Example 77), a compound of Exemplified Compound No. C-5 (Example 7)
8), Compound of Exemplified Compound No. C-10 (Example 7)
9), Compound of Exemplified Compound No. C-13 (Example 8)
0), compound of Exemplified Compound No. D-1 (Example 81),
Except for using the compound of Exemplified Compound No. D-6 (Example 82), the compound of Exemplified Compound No. D-12 (Example 83), and the compound of Exemplified Compound No. E-4 (Example 84),
An organic electroluminescent device was manufactured by the method described in Example 75. When a DC voltage of 12 V was applied to each device under a dry atmosphere, white light emission was observed. The characteristics were further examined, and the results are shown in Table 4 (Table 10).

[0106]

[Table 9]

Example 85 A glass substrate having a 200-nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone, and ethanol. The substrate was dried using nitrogen gas and further washed with UV / ozone. Next, poly-N-vinylcarbazole (weight average molecular weight 1
50000), 1,3-bis [5 '-(p-tert-butylphenyl) -1,3,4-oxadiazole-2'-
Il] benzene and a compound of Exemplified Compound No. C-10 were formed by dip coating using a 3% by weight dichloroethane solution containing 100: 30: 3 by weight to form a 300 nm light emitting layer. Next, after fixing the glass substrate having the light emitting layer to the substrate holder of the vapor deposition apparatus, the pressure in the vapor deposition tank was reduced to 3 × 10 ⁻⁶ Torr. Further, on the light emitting layer, magnesium and silver were co-deposited at a deposition rate of 0.2 nm / sec to a thickness of 200 nm (weight ratio: 10: 1) to form a cathode to produce an organic electroluminescent device. The prepared organic electroluminescent device was dried under a dry atmosphere for 15 minutes.
When a DC voltage of V was applied, a current of 72 mA / cm ² flowed. Red light emission with a luminance of 1460 cd / m ² was confirmed.

Comparative Example 3 In Example 85, when forming the light emitting layer, 1,1,4,4-
An organic electroluminescent device was produced by the method described in Example 85 except that tetraphenyl-1,3-butadiene was used. When a DC voltage of 15 V was applied to the produced organic electroluminescent device in a dry atmosphere, the voltage was 86 mA / c.
m ² of current flowed. Blue light emission with a luminance of 750 cd / m ² was confirmed.

Example 86 A glass substrate having a 200 nm-thick ITO transparent electrode (anode) was subjected to ultrasonic cleaning using a neutral detergent, acetone and ethanol. The substrate was dried using nitrogen gas and further washed with UV / ozone. Next, on the ITO transparent electrode, polycarbonate (weight average molecular weight: 50,000),
4,4′-bis [N-phenyl-N- (3 ″ -methylphenyl) amino] biphenyl, bis (2-methyl-8-
Quinolinolate) aluminum-μ-oxo-bis (2
-Methyl-8-quinolinolate) aluminum and the compound of Exemplified Compound No. A-13 were each added at a weight ratio of 10
Using a 3% by weight dichloroethane solution containing 0: 40: 60: 1 at a ratio of 30% by a dip coating method.
A 0 nm light emitting layer was formed. Next, after fixing the glass substrate having the light emitting layer to a substrate holder of a vapor deposition device,
The pressure in the evaporation tank was reduced to 3 × 10 ⁻⁶ Torr. Further, on the light emitting layer, magnesium and silver are deposited at a deposition rate of 0.2 nm / sec.
Then, co-evaporation (weight ratio: 10: 1) was performed to a thickness of 200 nm to form a cathode, thereby producing an organic electroluminescent device. When a DC voltage of 15 V was applied to the produced organic electroluminescent device in a dry atmosphere, a current of 62 mA / cm ² flowed. Brightness 9
Red light emission of 40 cd / m ² was confirmed.

[0110]

According to the present invention, it has become possible to provide an organic electroluminescent device having excellent light emission luminance. Further, it has become possible to provide a hydrocarbon compound suitable for the light-emitting element.

[Brief description of the drawings]

FIG. 1 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 2 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 3 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 4 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 5 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 6 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 7 is a schematic structural diagram of an example of an organic electroluminescent device.

FIG. 8 is a schematic structural diagram of an example of an organic electroluminescent device.

[Explanation of symbols]

 1: substrate 2: anode 3: hole injection / transport layer 3a: hole injection / transport component 4: light emitting layer 4a: light emitting component 5: electron injection / transport layer 5 ': electron injection / transport layer 5a: electron injection / transport component 6: cathode 7: Power supply

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09K 11/06 620 C09K 11/06 620 660 660 (72) Inventor Masakatsu Nakatsuka 580-32 Nagaura, Sodegaura-shi, Chiba Prefecture 32 Mitsui Chemicals, Inc. F term (reference) 3K007 AB02 AB03 AB04 AB11 CA01 CB01 DA01 DB03 DC00 EB00 4H006 AA01 AB92 GP03

Claims (8)

[Claims] A s-indaceno [1,2,3] is provided between a pair of electrodes.
-cd: 5,6,7-c'd '] An organic electroluminescent device in which at least one layer containing at least one diperylene derivative is sandwiched. 2. s-indaceno [1,2,3-cd: 5,6,7-c'd ']
2. The layer containing a diperylene derivative is a light emitting layer.
The organic electroluminescent device according to claim 1. 3. s-indaceno [1,2,3-cd: 5,6,7-c'd ']
The layer containing a diperylene derivative further contains a luminescent organometallic complex.
The organic electroluminescent device according to claim 1. 4. s-indaceno [1,2,3-cd: 5,6,7-c'd ']
3. The organic electroluminescent device according to claim 1, wherein the layer containing a diperylene derivative further contains a triarylamine derivative. 5. The organic electroluminescent device according to claim 1, further comprising a hole injection transport layer between the pair of electrodes. 6. The organic electroluminescent device according to claim 1, further comprising an electron injection / transport layer between the pair of electrodes. 7. S-indaceno [1,2,3-cd: 5,6,7-c'd ']
The organic electroluminescent device according to claim 1, wherein the diperylene derivative is a compound represented by the general formula (1-A) (Formula 1). Embedded image (Wherein X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group, a straight-chain,
Represents a branched or cyclic alkoxy group, or a substituted or unsubstituted aryl group. ) 8. A hydrocarbon compound represented by the general formula (1-A) (formula 2). Embedded image (Wherein X _{1 to} X ₂₂ each independently represent a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group, a straight-chain,
Represents a branched or cyclic alkoxy group, or a substituted or unsubstituted aryl group. )