JP5082356B2 - Carbazole-containing amine compounds and uses thereof - Google Patents

Description

  The present invention relates to a novel carbazole-containing amine compound. More specifically, when used in an organic electroluminescence device (hereinafter abbreviated as an organic EL device), the molecular crystallinity is low and the glass transition temperature (Tg) is low. Since it is high, the present invention relates to a carbazole-containing amine compound having excellent performance (low voltage driving, long life, high stability).

  Conventionally, application of carbazole derivatives to various functional materials and electronic materials has been studied. Utilizing the fact that the carbazole skeleton has a hole transporting property and a structure having high heat resistance, it can be applied to, for example, a charge transport material for an electrophotographic photosensitive member or a material for an organic EL device. It is being considered. As typical examples, polyvinyl carbazole (PVK) and N, N′-dicarbazoyl-4,4′-biphenyl (CBP) have been widely studied as materials for organic EL devices (non-patent literature). 1 and 2). When an organic EL element is driven or stored under a normal high temperature environment, adverse effects such as a change in emission color, a decrease in emission efficiency, an increase in drive voltage, and a shortened emission lifetime occur. In order to prevent this, it is necessary to increase the glass transition temperature (Tg) of the material. Although carbazoles such as PVK and CBP have a relatively high Tg and heat resistance, they have a highly symmetrical structure, so that when a thin film is formed by vacuum deposition or spin coating, etc. The stability of the device is low, the crystallized easily, and the lifetime of the device is extremely short.

  Under such circumstances, a diamine compound in which the 3-position of N-ethylcarbazole is substituted with an amino group has been disclosed (see Non-patent Documents 3 and 4, Patent Document 1). These diamine compounds have high film stability because they have an appropriate Ip as a hole injection material and a hole transport material and are non-crystalline due to the asymmetry of the carbazole ring. However, on the other hand, Tg was not so high, and the heat resistance was inferior, and sufficient life characteristics as an EL element could not be obtained.

Applied Physics Letters, 2001, 78, 278 Journal of the American Chemical Society 2001, 123, 4304 European Polymer Journal 2005, 41, 1821 Environmental and Chemical Physics 2002, 24, 30 Special table 2004-536134 gazette

        The problem of the present invention is that the molecule is difficult to crystallize while having a high Tg, and when used as a material for an organic EL device, low voltage driving and long life are obtained. Moreover, there is little damage to the organic material during the purification by the sublimation method or the like, and the purification is easy. In addition, when an organic electroluminescence element is produced by vapor deposition, the element can be easily produced with less damage to the organic compound. A carbazole-containing amine compound having excellent properties such as:

As a result of intensive studies to solve the above problems, the present inventors have arrived at the present invention.
That is, the present invention relates to a carbazole-containing amine compound represented by the following general formula [1].

General formula [1]

(In the formula, Ar ¹ represents a carbazolyl group represented by the following general formula [2],
Ar ^{2 to} Ar ⁴ are each independently a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent or a monovalent aromatic group having 2 to 18 carbon atoms which may have a substituent. A heterocyclic group of (except for the case of the following general formula [2]),
A represents a biphenylene group represented by the following general formula [3] . )

General formula [2]

(In the formula, Ar ⁵ represents a group represented by the following general formula [5] ,
R ^{1 to} R ⁷ are each independently a hydrogen atom, a halogen atom, a monovalent aliphatic hydrocarbon group that may have a substituent, or a monovalent aromatic hydrocarbon group that may have a substituent. A monovalent aliphatic heterocyclic group which may have a substituent, a monovalent aromatic heterocyclic group which may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, -Represents a ruthio group, a substituted amino group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group . )

General formula [3]

（式中、Ｒ ³⁸ は、
水素原子、ハロゲン原子、シアノ基、炭素数１〜３のアルキル基、炭素数６〜１２の一価の芳香族炭化水素基、あるいは、炭素数２〜５の一価の複素環基を表す。ここで、炭素数６〜１２の一価の芳香族炭化水素基、および、炭素数２〜５の一価の複素環基は、ハロゲン原子、１価の脂肪族炭化水素基、１価の芳香族炭化水素基、１価の脂肪族複素環基、１価の芳香族複素環基、シアノ基、アルコキシ基、アリ−ルオキシ基、アルキルチオ基、アリ−ルチオ基、アシル基、アルコキシカルボニル基、アリ−ルオキシカルボニル基、アルキルスルホニル基、または、アリ−ルスルホニル基で置換されてもよい。）
また、本発明は、Ａが、下記一般式［４］で表されることを特徴とする上記カルバゾ−ル含有アミン化合物に関する。 (In the formula, one of R ^{20 to} R ²⁴ and one of R ^{25 to} R ²⁹ represent a bond, and the rest each independently have a hydrogen atom, a halogen atom, or a substituent. A monovalent aliphatic hydrocarbon group, a monovalent aromatic hydrocarbon group that may have a substituent, a monovalent aliphatic heterocyclic group that may have a substituent, and a substituent. A monovalent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, substituted amino group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, (It represents an alkylsulfonyl group or an arylsulfonyl group, and adjacent groups may form a ring with each other.)
General formula [5]

(Wherein R ³⁸ is
A hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 3 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, or a monovalent heterocyclic group having 2 to 5 carbon atoms is represented. Here, the monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms and the monovalent heterocyclic group having 2 to 5 carbon atoms are a halogen atom, a monovalent aliphatic hydrocarbon group, and a monovalent aromatic group. Aromatic hydrocarbon group, monovalent aliphatic heterocyclic group, monovalent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, acyl group, alkoxycarbonyl group, ant -It may be substituted with an alkylsulfonyl group, an alkylsulfonyl group, or an arylsulfonyl group. )
The present invention also relates to the above carbazole-containing amine compound, wherein A is represented by the following general formula [4].

General formula [4]

(Wherein R ^{30 to} R ³⁷ represent a hydrogen atom, a halogen atom, or a monovalent organic residue,
R ³⁰ and R ³¹ , R ³² and R ³³ , R ³⁴ and R ³⁵ , or R ³⁶ and R ³⁷ may combine with each other to form a ring. )

  The present invention also relates to a material for an organic electroluminescence device comprising the carbazole-containing amine compound.

  Further, the present invention provides an organic electroluminescent device comprising a light emitting layer or a plurality of organic layers including a light emitting layer between a pair of electrodes, wherein at least one of the organic layers comprises the material for an organic electroluminescent device. It is related with the organic electroluminescent element which comprises.

  Further, the present invention provides an organic electroluminescence device having a hole injection layer and / or a hole transport layer, wherein the hole injection layer and / or the hole transport layer comprises the organic electroluminescence device material. The present invention relates to an electroluminescence element.

  An organic EL device using the carbazole-containing amine compound of the present invention as a material for an organic EL device has a very high stability of a thin film, emits light at a low driving voltage, and has a long life. It can be suitably used as a flat panel display or a flat light emitter, and can be applied to light sources such as copiers and printers, light sources such as liquid crystal displays and instruments, display boards, and indicator lights.

  Hereinafter, the present invention will be described in detail. First, the carbazole-containing amine compound represented by the general formula [1] will be described.

In the carbazole-containing amine compound represented by the general formula [1], A is

One general formula biphenylene group represented by [3], a biphenylene group and particularly preferably represented by the general formula [4].

In the general formula [1], Ar ^{2 to} Ar ⁴ are each a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent, and 2 to 2 carbon atoms which may have a substituent. 18 monovalent heterocyclic groups (except in the case of the general formula [2]).

  Here, examples of the monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent include a phenyl group, a naphthyl group, a biphenyl group, an anthranyl group, a phenanthryl group, a fluorenyl group, and a pyrenyl group. , 3-methylphenyl group, 3-methoxyphenyl group, 3-fluorophenyl group, 3-trichloromethylphenyl group, 3-trifluoromethylphenyl group, 3-nitrophenyl group and the like. Of these, a phenyl group, a naphthyl group, a biphenyl group, an anthranyl group, a phenanthryl group, and a fluorenyl group are preferable.

  Examples of the monovalent heterocyclic group having 2 to 18 carbon atoms which may have a substituent include a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, an indolinyl group, a quinolinyl group, and an acridinyl group. , Pyrrolidinyl group, dioxanyl group, piperidinyl group, morpholinyl group, piperazinyl group, furanyl group, thiophenyl group, oxazolyl group, oxadiazolyl group, benzoxazolyl group, thiazolyl group, thiadiazolyl group, benzothiazolyl group, triazolyl group, imidazolyl group, benzimidazolyl Group, pranyl group and the like. Among these, a pyridinyl group, a quinolinyl group, a carbazolyl group, a furanyl group, a thiophenyl group, and an oxazolyl group are preferable. However, the carbazolyl group represented by the general formula [2] is excluded.

In General Formula [2], Ar ⁵ is a group represented by General Formula [5], and R ^{1 to} R ⁷ are each independently a monovalent group that may have a hydrogen atom, a halogen atom, or a substituent. An aliphatic hydrocarbon group, a monovalent aromatic hydrocarbon group which may have a substituent, a monovalent aliphatic heterocyclic group which may have a substituent, or a substituent which may have 1 Valent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, substituted amino group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, or Represents an arylsulfonyl group .

Examples of the halogen atom in R ^{1 to} R ⁷ include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

  Here, the monovalent aliphatic hydrocarbon group refers to a monovalent aliphatic hydrocarbon group having 1 to 18 carbon atoms, such as an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group. Can be given.

  Therefore, as the alkyl group, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, isopentyl group, hexyl group, heptyl group, octyl group, C1-C18 alkyl groups, such as a decyl group, a dodecyl group, a pentadecyl group, and an octadecyl group, are mentioned.

  Examples of the alkenyl group include vinyl group, 1-propenyl group, 2-propenyl group, isopropenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, 1-octenyl group, 1-decenyl group, 1 -An alkenyl group having 2 to 18 carbon atoms such as an octadecenyl group.

  Examples of the alkynyl group include ethynyl group, 1-propynyl group, 2-propynyl group, 1-butynyl group, 2-butynyl group, 3-butynyl group, 1-octynyl group, 1-decynyl group and 1-octadecynyl group. Examples thereof include alkynyl groups having 2 to 18 carbon atoms.

  Examples of the cycloalkyl group include cycloalkyl groups having 3 to 18 carbon atoms such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, and a cyclooctadecyl group.

  Furthermore, examples of the monovalent aromatic hydrocarbon group include monovalent monocyclic, condensed ring, and ring assembly hydrocarbon groups having 6 to 18 carbon atoms. Here, as monovalent monocyclic aromatic hydrocarbon group having 6 to 18 carbon atoms, phenyl group, o-tolyl group, m-tolyl group, p-tolyl group, 2,4-xylyl group, p-cumenyl And monovalent monocyclic aromatic hydrocarbon groups having 6 to 18 carbon atoms, such as a group and a mesityl group.

  Examples of the monovalent condensed ring hydrocarbon group include 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 2-anthryl group, 5-anthryl group, 1-phenanthryl group, 9-phenanthryl group, 1- Examples thereof include monovalent condensed ring hydrocarbon groups having 10 to 18 carbon atoms such as acenaphthyl group, 2-azurenyl group, 1-pyrenyl group and 2-triphenylyl group.

  Examples of the monovalent ring assembly hydrocarbon group include monovalent ring assembly hydrocarbon groups having 12 to 18 carbon atoms such as o-biphenylyl group, m-biphenylyl group, and p-biphenylyl group.

  Examples of the monovalent aliphatic heterocyclic group include monovalent aliphatic heterocyclic groups having 3 to 18 carbon atoms such as a 2-pyrazolino group, a piperidino group, a morpholino group, and a 2-morpholinyl group.

  Examples of the monovalent aromatic heterocyclic group include triazolyl group, 3-oxadiazolyl group, 2-furyl group, 3-furyl group, 2-thienyl group, 3-thienyl group, 1-pyrrolyl group, 2- Pyrrolyl, 3-pyrrolyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrazyl, 2-oxazolyl, 3-isoxazolyl, 2-thiazolyl, 3-isothiazolyl Group, 2-imidazolyl group, 3-pyrazolyl group, 2-quinolyl group, 3-quinolyl group, 4-quinolyl group, 5-quinolyl group, 6-quinolyl group, 7-quinolyl group, 8-quinolyl group, 1-isoquinolyl group A monovalent aromatic compound having 2 to 18 carbon atoms such as a group, 2-quinoxalinyl group, 2-benzofuryl group, 2-benzothienyl group, N-indolyl group, N-carbazolyl group, N-acridinyl group. Ring group, and the like.

  Examples of the alkoxy group include C1-C8 alkoxyl groups such as methoxy group, ethoxy group, propoxy group, butoxy group, tert-butoxy group, octyloxy group, and tert-octyloxy group.

  The aryloxy group includes aryloxy groups having 6 to 14 carbon atoms such as phenoxy group, 4-tert-butylphenoxy group, 1-naphthyloxy group, 2-naphthyloxy group, and 9-anthryloxy group. can give.

  Examples of the alkylthio group include C1-C8 alkylthio groups such as a methylthio group, an ethylthio group, a tert-butylthio group, a hexylthio group, and an octylthio group.

  Examples of the arylthio group include arylthio groups having 6 to 14 carbon atoms such as a phenylthio group, a 2-methylphenylthio group, and a 4-tert-butylphenylthio group.

  The substituted amino group includes N-methylamino group, N-ethylamino group, N, N-diethylamino group, N, N-diisopropylamino group, N, N-dibutylamino group, N-benzylamino group, N , N-dibenzylamino group, N-phenylamino group, N-phenyl-N-methylamino group, N, N-diphenylamino group, N, N-bis (m-tolyl) amino group, N, N-bis (P-tolyl) amino group, N, N-bis (p-biphenylyl) amino group, bis [4- (4-methyl) biphenylyl] amino group, N-α-naphthyl-N-phenylamino group, N-β Examples thereof include substituted amino groups having 2 to 16 carbon atoms such as naphthyl-N-phenylamino group.

  Examples of the acyl group include acyl groups having 2 to 14 carbon atoms such as an acetyl group, a propionyl group, a pivaloyl group, a cyclohexylcarbonyl group, a benzoyl group, a toluoyl group, an anisoyl group, and a cinnamoyl group.

  Moreover, as an alkoxycarbonyl group, C2-C14 alkoxycarbonyl groups, such as a methoxycarbonyl group, an ethoxycarbonyl group, a benzyloxycarbonyl group, are mention | raise | lifted.

  Moreover, as an aryloxycarbonyl group, C2-C14 aryloxycarbonyl groups, such as a phenoxycarbonyl group and a naphthyloxycarbonyl group, are mention | raise | lifted.

  Moreover, as an alkylsulfonyl group, C2-C14 alkylsulfonyl groups, such as a mesyl group, an ethylsulfonyl group, a propylsulfonyl group, are mention | raise | lifted.

  Moreover, as an arylsulfonyl group, C2-C14 arylsulfonyl groups, such as a benzenesulfonyl group and p-toluenesulfonyl group, are mention | raise | lifted.

The monovalent aliphatic hydrocarbon group, aromatic hydrocarbon group, aliphatic heterocyclic group and aromatic heterocyclic group in these R ^{1 to} R ⁷ may be further substituted with other substituents. These substituents may be bonded to each other to form a ring. Such substituents include halogen atoms, cyano groups, alkoxyl groups, aryloxy groups, alkylthio groups, arylthio groups, substituted amino groups, acyl groups, alkoxycarbonyl groups, aryloxycarbonyl groups, alkylsulfonyls. Group, arylsulfonyl group and the like. Examples of these substituent groups include those described above.

Next, the biphenylene group represented by the general formula [3] will be described. One of R ^{20 to} R ²⁴ and one of R ^{25 to} R ²⁹ represent a bond, and the rest may each independently have a hydrogen atom, a halogen atom, or a substituent 1 A monovalent aliphatic hydrocarbon group, a monovalent aromatic hydrocarbon group which may have a substituent, a monovalent aliphatic heterocyclic group which may have a substituent, or a substituent. Monovalent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, substituted amino group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, Or, it represents an arylsulfonyl group .

R ^{25 to} R ²⁹ may have a halogen atom, a monovalent aliphatic hydrocarbon group which may have a substituent, a monovalent aromatic hydrocarbon group which may have a substituent, or a substituent. A monovalent aliphatic heterocyclic group, a monovalent aromatic heterocyclic group which may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, a substituted amino group, The acyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, or arylsulfonyl group is a monovalent fatty acid which may have a halogen atom or a substituent in the aforementioned R ^{1 to} R ⁷ . Aromatic hydrocarbon group, monovalent aromatic hydrocarbon group which may have a substituent, monovalent aliphatic heterocyclic group which may have a substituent, monovalent which may have a substituent Aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkyl Thio, ant - thio group, substituted amino group, an acyl group, an alkoxycarbonyl group, ant - Le oxycarbonyl group, an alkylsulfonyl group or ants - the same meaning as described in Rusuruhoniru group.

Further, adjacent groups may form a ring with each other.

In the general formula [3], one of R ^{20 to} R ²⁴ and one of R ^{25 to} R ²⁹ are a bond and form a biphenylene group.

  The position of the bond is not particularly limited, and in the case of the biphenylene bond of the general formula [3], 2,2′-biphenylene, 3,3′-biphenylene, 4,4′-biphenylene, 2,3 ′ It may be -biphenylene, 2,4'-biphenylene, 3,4'-biphenylene or the like.

Among these bonds, preferred is 4,4′-biphenylene in which R ²⁰ and R ²⁵ are bonds. This is because the higher the symmetry of the molecule, the higher the heat resistance and the higher Tg can be expected, and the easier it is to synthesize the compound.

Among R ^{16 to} R ¹⁹ , R ^{21 to} R ²⁴ that are not a bond, and R ^{26 to} R ²⁸ that are not a bond, more preferred examples include a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, a phenyl group, and a tolyl group. Etc. When these substituents are used, the molecular weight is relatively small, and it is easy to sublimate a compound (material) by vapor deposition or the like, and is preferable from the viewpoint of stability.

Next, general formula [4] will be described. R ^{30 to} R ³⁷ are a hydrogen atom, a halogen atom, a monovalent aliphatic hydrocarbon group which may have a substituent, a monovalent aromatic hydrocarbon group which may have a substituent, or a substituent. A monovalent aliphatic heterocyclic group that may have, a monovalent aromatic heterocyclic group that may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, A substituted amino group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group is represented.

R ^{30 to} R ³⁷ may have a halogen atom, a monovalent aliphatic hydrocarbon group which may have a substituent, a monovalent aromatic hydrocarbon group which may have a substituent, or a substituent. A monovalent aliphatic heterocyclic group, a monovalent aromatic heterocyclic group which may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, a substituted amino group, The acyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkylsulfonyl group, or arylsulfonyl group is a monovalent fatty acid which may have a halogen atom or a substituent in the aforementioned R ^{1 to} R ⁷ . Aromatic hydrocarbon group, monovalent aromatic hydrocarbon group which may have a substituent, monovalent aliphatic heterocyclic group which may have a substituent, monovalent which may have a substituent Aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkyl Thio, ant - thio group, substituted amino group, an acyl group, an alkoxycarbonyl group, ant - Le oxycarbonyl group, an alkylsulfonyl group or ants - the same meaning as described in Rusuruhoniru group.

R ³⁰ and R ³¹ , R ³² and R ³³ , R ³⁴ and R ³⁵ , or R ³⁶ and R ³⁷ may be bonded to each other to form a ring.

Next, general formula [5] will be described. R ³⁸ represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 3 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms which may have a substituent, or a substituent. A monovalent heterocyclic group having 2 to 5 carbon atoms which may be present.

The alkyl group having 1 to 3 carbon atoms, the monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, and the monovalent heterocyclic group having 2 to 5 carbon atoms have a substituent of R ^{1 to} R ^7. A monovalent aliphatic hydrocarbon group, a monovalent aromatic hydrocarbon group that may have a substituent, a monovalent aliphatic heterocyclic group that may have a substituent, and a substituent. Among those described in the section of the monovalent aromatic heterocyclic group which may be used , those having the corresponding carbon number are raised. Examples of the substituent that may have a halogen atom described above, a monovalent aliphatic hydrocarbon group that may have a substituent, a monovalent aromatic hydrocarbon group that may have a substituent, Monovalent aliphatic heterocyclic group which may have a substituent, monovalent aromatic heterocyclic group which may have a substituent, cyano group, alkoxy group, aryloxy group, alkylthio group, ali- thio group, an acyl group, an alkoxycarbonyl group, ant - Le oxycarbonyl group, an alkylsulfonyl group or ants - Ru Rusuruhoniru groups der.

Particularly preferable examples of R ³⁸ include a hydrogen atom, phenyl group, biphenyl group, tolyl group, xylyl group, methyl group, ethyl group, fluorine atom and the like.

Here, the 3-carbazolyl group of the general formula [2] is more preferably a case where R ^{1 to} R ⁷ are hydrogen atoms. When such a structure is adopted, the molecular weight is relatively small, and it is easy to form a thin film by sublimating a compound (material) by vapor deposition or the like, and is excellent in terms of stability. Because.

  The superiority of having a 3-carbazolyl group of the general formula [2] will be described below.

  In general, a carbazole compound has a stronger structure and a higher thermal stability than a diphenylamino compound having no bond (see Chemical Formula 6).

In the carbazole compound, an N-alkyl compound in which an alkyl group is arranged at another bonding position on nitrogen is well known, but the compound of the present invention has a substituent ( One feature is that = Ar ⁵ ) is an aromatic group or a heteroaromatic group. Aromatic groups and heteroaromatic groups are further effective in increasing stability. Among them, the effect of increasing stability can be expected. Ar ⁵ is represented by the general formula [5], that is, R on the nitrogen atom. ^This is a case of a phenyl group having ³⁸ as a substituent.

  By the way, the effect of the carbazolyl group bonded at the 3-position will be mentioned. Usually, the amino group acts as an electron donor, but the nitrogen atom of the carbazole has little donor property with respect to the substituent bonded on the nitrogen atom. This is because the carbazole ring has planarity and is a very bulky substituent, and it is difficult to form a planar structure with the substituent on the nitrogen atom. It is thought that there is. On the contrary, since the carbazole ring bonded at the 3-position has the planarity of the ring, it can be an electron donor for the benzene ring portion (see Chemical Formula 7).

  Therefore, in the carbazole-containing amine compound of the present invention, both the amino group bonded to the carbazole ring and the nitrogen atom of the carbazole ring become electron donors to the benzene ring of the carbazole ring. It is considered that an electron donor effect equivalent to or higher than that of a phenylenediamine structure can be exhibited (see Chemical Formula 8).

  For these reasons, the carbazole-containing amine compound of the present invention tends to be a compound having a small ionization potential (a compound in which the ground state of the organic molecule is at a higher level). A compound having a high hole injecting and transporting property can be obtained.

  Furthermore, since the carbazole ring bonded at the 3-position has a lower molecular symmetry than the carbazole ring bonded on the nitrogen atom, the crystallinity of the molecule is lowered and the amorphous property is increased. It is also possible to greatly contribute to the improvement of stability when a thin film is formed.

  In particular, since the carbazole-containing amine compound of the present invention is asymmetric, it is highly amorphous and, as a result, crystallization hardly occurs. This property, when used as a material for an organic EL element, improves the stability of the thin film, makes it difficult for dark spots to occur, and increases the lifetime of the organic EL element.

  In addition, since the carbazole-containing amine compound of the present invention has only one carbazolyl group introduced in the molecule, the molecular weight is smaller than that of the dicarbazole compound, and thus the purification can be achieved by a sublimation method or the like. At this time, since sublimation purification can be performed at a relatively low temperature, there is little damage to the organic material, and purification is easy. That is, the molecular weight of the compound is preferably 1500 or less, more preferably 1300 or less, further preferably 1200 or less, and particularly preferably 1100 or less. This is because the molecular weight is large and there is a concern that the vapor deposition property in the case of producing an element by vapor deposition is deteriorated.

  In addition, when creating an organic electroluminescence device by vapor deposition, there is a concern that the vapor deposition property in the case of creating a device by vapor deposition is deteriorated when the molecular weight is large, but the carbazole-containing amine compound of the present invention is There is little damage to the organic compound during vapor deposition, and the device can be easily fabricated. Even when an organic EL element is produced by a coating method, the monocarbazolyl compound has high solubility in a general-purpose organic solvent, and thus can be used in a wide range of solvents.

  In addition, the carbazole-containing amine compound of the present invention has a high glass transition point and a high melting point, and is resistant to the Joule heat generated in the organic layer, the organic layer, or between the organic layer and the metal electrode during electroluminescence. Therefore, when used as an organic EL device material, it exhibits high luminous efficiency and is advantageous when emitting light for a long time.

  Representative examples of the compounds of the present invention are shown in Table 1 below, but the present invention is not limited to these representative examples.

Table 1

  The carbazole-containing amine compound of the present invention can be used for various applications. As a material that develops functions such as sensitizing effect, heat generation effect, coloring effect, fading effect, phosphorescence effect, phase change effect, photoelectric conversion effect, photomagnetic effect, photocatalytic effect, light modulation effect, optical recording effect, radical generation effect, etc. Or conversely, it can also be used as a material having a light emitting function under these effects. More specifically, light emitting materials, photoelectric conversion materials, optical recording materials, image forming materials, photochromic materials, organic EL materials, photoconductive materials, dichroic materials, radical generating materials, acid generating materials, base generating materials, phosphorescent materials Materials, nonlinear optical materials, second harmonic generating materials, third harmonic generating materials, photosensitive materials, light absorbing materials, near infrared absorbing materials, photochemical hole burning materials, optical sensing materials, optical markings Examples thereof include materials, sensitizing materials for photochemical therapy, optical phase change recording materials, photosintered recording materials, magneto-optical recording materials, and dyes for photodynamic therapy.

  Of these various uses, the organic EL material (organic EL material, organic EL element material) is particularly preferably used.

  In the case of use as a material for an organic EL device, a high-purity material is particularly required. In such a case, the carbazole-containing amine compound of the present invention is obtained by a sublimation purification method, a recrystallization method, A reprecipitation method, a zone melting method, a column purification method, an adsorption method, or the like, or a combination of these methods can be used. Of these purification methods, the recrystallization method is preferred. For compounds having sublimation properties, it is preferable to employ a sublimation purification method. In the sublimation purification, it is preferable to employ a method in which the sublimation boat is maintained at a temperature lower than the temperature at which the target compound is sublimated, and the sublimation impurities are removed in advance. In addition, it is desirable to apply a temperature gradient to the portion where the sublimate is collected so that the sublimate is dispersed in the impurities and the target product. Sublimation purification as described above is purification that separates impurities, and can be applied to the present invention. In addition, sublimation purification is useful for predicting the difficulty of the material vapor deposition.

  Here, the organic EL device that can be prepared using the carbazole-containing amine compound of the present invention will be described in detail.

  The organic EL element is composed of an element in which a single layer or a multilayer organic layer is formed between an anode and a cathode. Here, the single layer type organic EL element is an element composed of only a light emitting layer between an anode and a cathode. Point to. On the other hand, the multilayer organic EL element facilitates injection of holes and electrons into the light emitting layer in addition to the light emitting layer, and facilitates recombination of holes and electrons in the light emitting layer. For the purpose of this, it refers to a layer in which a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, and the like are laminated. Therefore, typical element configurations of the multilayer organic EL element include (1) anode / hole injection layer / light emitting layer / cathode, and (2) anode / hole injection layer / hole transport layer / light emitting layer / cathode. (3) Anode / hole injection layer / light emitting layer / electron injection layer / cathode, (4) Anode / hole injection layer / hole transport layer / light emitting layer / electron injection layer / cathode, (5) Anode / positive Hole injection layer / light emitting layer / hole blocking layer / electron injection layer / cathode, (6) anode / hole injection layer / hole transport layer / light emitting layer / hole blocking layer / electron injection layer / cathode, (7) An element structure in which a multilayer structure of anode / light emitting layer / hole blocking layer / electron injection layer / cathode, (8) anode / light emitting layer / electron injection layer / cathode, etc., is considered.

  Moreover, each organic layer mentioned above may be formed by the layer structure of two or more layers, respectively, and several layers may be laminated | stacked repeatedly. As such an example, an element configuration called “multi-photon emission” in which a part of the above-described multilayer organic EL element is multilayered has been proposed in recent years for the purpose of improving light extraction efficiency. For example, in an organic EL device composed of a glass substrate / anode / hole transport layer / electron transporting light emitting layer / electron injection layer / charge generating layer / light emitting unit / cathode, the charge generating layer and the light emitting unit A method of laminating a plurality of layers is an example.

  The carbazole-containing amine compound (material for an organic electroluminescence device) of the present invention may be used for any of the above-mentioned layers, but it is particularly preferably used for a hole injection layer, a hole transport layer, and a light emitting layer. Can do. The organic electroluminescent device material of the present invention can be used not only as a single compound but also as a combination of two or more compounds, that is, mixed, co-evaporated, laminated, etc. It is. Further, in the above-described hole injection layer, hole transport layer, and light emitting layer, they may be used together with other materials.

For the hole injection layer, a hole injection material that exhibits an excellent hole injection effect with respect to the light emitting layer and that can form a hole injection layer excellent in adhesion to the anode interface and thin film formability is used. In addition, when such materials are laminated in multiple layers and a material having a high hole injection effect and a material having a high hole transport effect are laminated, the materials used for each are called a hole injection material and a hole transport material. Sometimes. The organic electroluminescent element material of the present invention can be suitably used for both hole injection materials and hole transport materials. These hole injection materials and hole transport materials need to have high hole mobility and low ionization energy, usually 5.5 eV or less. Such a hole injection layer is preferably a material that transports holes to the light emitting layer with a lower electric field strength, and further has a hole mobility of at least when an electric field of 10 ⁴ to 10 ⁶ V / cm is applied. What is 10 ^<-6 > cm ^{< 2} > / V * second is preferable. Other hole injection materials and hole transport materials that can be used by mixing with the organic electroluminescence device material of the present invention are not particularly limited as long as they have the above-mentioned preferable properties. An arbitrary material can be selected and used from those commonly used as a charge transport material for holes in an optical transmission material and known materials used for a hole injection layer of an organic EL element.

  Specific examples of such hole injection materials and hole transport materials include triazole derivatives (see US Pat. No. 3,112,197) and oxadiazole derivatives (US Pat. No. 3,189). , 447, etc.), imidazole derivatives (see Japanese Patent Publication No. 37-16096), polyarylalkane derivatives (US Pat. Nos. 3,615,402 and 3,820,989). No. 3,542,544, JP-B-45-555, JP-A-51-10983, JP-A-51-93224, JP-A-55-17105, JP-A-56-4148 55-108667, 55-156953, 56-36656, etc.), pyrazoline derivatives and pyrazolone derivatives (US Pat. No. 3,180, No. 29, No. 4,278,746, JP-A 55-88064, No. 55-88065, No. 49-105537, No. 55-51086, No. 56-80051. No. 56-88141, No. 57-45545, No. 54-112437, No. 55-74546, etc.), phenylenediamine derivatives (US Pat. No. 3,615,404, Japanese Patent Publication Nos. 51-10105, 46-3712, 47-25336, JP 54-53435, 54-110536, 54-1119925, etc.), Ali- Ruamine derivatives (US Pat. Nos. 3,567,450, 3,180,703, 3,240,597, No. 658,520, No. 4,232,103, No. 4,175,961, No. 4,012,376, JP-B 49-35702, No. 39 -27577, JP-A-55-144250, JP-A-56-119132, JP-A-56-22437, West German Patent No. 1,110,518, etc.), amino-substituted chalcone derivatives (US patents) No. 3,526,501 etc.), oxazole derivatives (disclosed in US Pat. No. 3,257,203 etc.), styryl anthracene derivatives (see JP 56-46234 A, etc.) ), Fluorenone derivatives (see JP-A-54-110837, etc.), hydrazone derivatives (US Pat. No. 3,717,462, JP-A-54-59143, 55-52063, 55-52064, 55-46760, 55-85495, 57-11350, 57-148749, JP-A-2-311591, etc. Stilbene derivatives (Japanese Patent Laid-Open Nos. 61-210363, 61-228451, 61-14642, 61-72255, 62-47646, 62-36674) 62-10652, 62-30255, 60-93455, 60-94462, 60-174749, 60-175052, etc.), silazane derivatives (US) Patent No. 4,950,950), polysilane (JP-A-2-204996), aniline copolymer (JP-A-2-282263), a conductive polymer disclosed in Japanese Patent Laid-Open No. 1-211399 oligomer - (particularly thiophene oligomer -) and the like.

  As the hole injecting material and the hole transporting material, those described above can be used. Porphyrin compounds (Japanese Patent Laid-Open No. 63-295965), aromatic tertiary amine compounds and styrylamine compounds (US Pat. No. 4,127,412, JP-A-53-27033, 54-58445, 54-149634, 54-64299, 55-79450, 55-144250 No. 56-119132, No. 61-295558, No. 61-98353, No. 63-295695, etc.) can also be used. For example, 4,4′-bis (N- (1-naphthyl) -N-phenylamino) biphenyl having two condensed aromatic rings in the molecule described in US Pat. No. 5,061,569, etc. And 4,4 ′, 4 ″ -tris (N- (3-methylphenyl)-, in which three triphenylamine units described in JP-A-4-308688 are linked in a starburst type. N-phenylamino) triphenylamine, etc. In addition, examples of the hole injection material include phthalocyanine derivatives such as copper phthalocyanine and hydrogen phthalocyanine, and other aromatic dimethylidene compounds, p-type Si, p Inorganic compounds such as type SiC can also be used as the material for the hole injection material and the hole transport material.

  Specific examples of the aromatic tertiary amine derivative include, for example, N, N′-diphenyl-N, N ′-(3-methylphenyl) -1,1′-biphenyl-4,4′-diamine, N, N , N ′, N ′-(4-methylphenyl) -1,1′-phenyl-4,4′-diamine, N, N, N ′, N ′-(4-methylphenyl) -1,1′- Biphenyl-4,4′-diamine, N, N′-diphenyl-N, N′-dinaphthyl-1,1′-biphenyl-4,4′-diamine, N, N ′-(methylphenyl) -N, N '-(4-N-butylphenyl) -phenanthrene-9,10-diamine, N, N-bis (4-di-4-tolylaminophenyl) -4-phenyl-cyclohexane, N, N'-bis (4 '-Diphenylamino-4-biphenylyl) -N, N'-diphenyl Nzine, N, N′-bis (4′-diphenylamino-4-phenyl) -N, N′-diphenylbenzidine, N, N′-bis (4′-diphenylamino-4-phenyl) -N, N ′ -Di (1-naphthyl) benzidine, N, N'-bis (4'-phenyl (1-naphthyl) amino-4-phenyl) -N, N'-diphenylbenzidine, N, N'-bis (4'- Phenyl (1-naphthyl) amino-4-phenyl) -N, N′-di (1-naphthyl) benzidine and the like can be mentioned, and these can be used for both hole injection materials and hole transport materials.

  As the hole injection material and hole transport material used together with the compound of the present invention (material for organic EL device), the following general formulas [6] to [11] can be used.

General formula [6]

(In the formula, R ^{a11 to} R ^a14 each independently represent a hydrogen atom, an alkoxyl group, or a cyano group, but they are not all hydrogen atoms at the same time.)

Here, as an alkoxyl group, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a tert-butoxy group, an octyloxy group, a tert-octyloxy group, a 2-bornyloxy group, a 2-isobornyloxy group, 1- Examples thereof include an alkoxyl group having 1 to 18 carbon atoms such as an adamantyloxy group. Particularly preferred combinations of ^{R a11 ~R a14, R a11 ~R} a14 are all methoxy group, or a case of an ethoxy group or cyano group.

General formula [7]

(In the formula, Z ²¹ represents a linking group, and represents a single bond, a divalent aliphatic hydrocarbon group, a divalent aromatic hydrocarbon group, an oxygen atom or a sulfur atom. R ^{a21 to} R ^a26 are And each independently represents a monovalent aromatic hydrocarbon group.)

As the linking group for Z ²¹ , a single bond, vinylene group, o-phenylene group, m-phenylene group, p-phenylene group, 1,4-naphthylene group, 2,6-naphthylene group, 9,10-phenanthrylene group, A 9,10-anthrylene group is preferable, and a single bond, vinylene group, p-phenylene group, and 1,4-naphthylene group are more preferable. R ^{a21 to} R ^a26 include a monovalent aromatic hydrocarbon group selected from a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group. preferable.

General formula [8]

(In the formula, Z ³¹ represents a linking group, and represents a single bond, a divalent aliphatic hydrocarbon group, a divalent aromatic hydrocarbon group, an oxygen atom, or a sulfur atom. R ^{a31 to} R ^a36 represent And each independently represents a monovalent aromatic hydrocarbon group.)

As the linking group for Z ³¹ , a single bond, vinylene group, o-phenylene group, m-phenylene group, p-phenylene group, 1,4-naphthylene group, 2,6-naphthylene group, 9,10-phenanthrylene group, A 9,10-anthrylene group is preferable, and a single bond, vinylene group, p-phenylene group, and 1,4-naphthylene group are more preferable. R ^{a31 to} R ^a36 include a monovalent aromatic hydrocarbon group selected from a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group. preferable.

General formula [9]

(In the formula, R ^{a41 to} R ^a48 each independently represents a monovalent aromatic hydrocarbon group.)

R ^{a41 to} R ^a48 are preferably monovalent aromatic hydrocarbon groups selected from a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group.

Formula [10]

(In the formula, R ^{a51 to} R ^a56 each independently represents a monovalent aromatic hydrocarbon group.)

R ^{a51 to} R ^a56 are preferably monovalent aromatic hydrocarbon groups selected from a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group.

General formula [11]

(In the formula, R ^{a61 to} R ^a64 each independently represents a monovalent aromatic hydrocarbon group, and p represents an integer of 1 to 4.)

R ^{a61 to} R ^a64 are preferably monovalent aromatic hydrocarbon groups selected from a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group.

  The compounds represented by the general formulas [6] to [11] described above are preferably used as a hole injection material. Table 2 below shows particularly preferred examples.

Table 2

  Moreover, as a hole transport material which can be used with the compound (material for organic EL elements) of this invention, the well-known compound shown in following Table 3 is mention | raise | lifted.

Table 3

  In order to form this hole injection layer, the above compound is thinned by a known method such as a vacuum deposition method, a spin coating method, a casting method, or an LB method. Although there is no restriction | limiting in particular, Usually, they are 5 nm-5 micrometers.

  On the other hand, for the electron injection layer, an electron injection material that exhibits an excellent electron injection effect with respect to the light emitting layer and that can form an electron injection layer excellent in adhesion to the cathode interface and thin film formability is used. Examples of such electron injection materials include metal complex compounds, nitrogen-containing five-membered ring derivatives, fluorenone derivatives, anthraquinodimethane derivatives, diphenoquinone derivatives, thiopyrandioxide derivatives, perylenetetracarboxylic acid derivatives, fluorenylidenemethane. Derivatives, anthrone derivatives, silole derivatives, triarylphosphine oxide derivatives, calcium acetylacetonate, sodium acetate and the like. In addition, inorganic / organic composite materials doped with metal such as cesium in bathophenanthroline (Proceedings of the Society of Polymer Science, Vol. 50, No. 4, 660, published in 2001) and the 50th Association of Applied Physics Lecture Proceedings, No. Examples of electron injection materials include BCP, TPP, T5MPyTZ, etc. published on page 3, 1402, 2003. Electrons can be transported by forming a thin film necessary for device fabrication and injecting electrons from the cathode. If it is material, it will not specifically limit to these.

  Among the electron injection materials, particularly effective electron injection materials include metal complex compounds, nitrogen-containing five-membered ring derivatives, silole derivatives, and triarylphosphine oxide derivatives. As a preferable metal complex compound that can be used in the present invention, a metal complex of 8-hydroxyquinoline or a derivative thereof is suitable. Specific examples of the metal complex of 8-hydroxyquinoline or its derivatives include tris (8-hydroxyquinolinato) aluminum, tris (2-methyl-8-hydroxyquinolinato) aluminum, tris (4-methyl- 8-hydroxyquinolinato) aluminum, tris (5-methyl-8-hydroxyquinolinato) aluminum, tris (5-phenyl-8-hydroxyquinolinato) aluminum, bis (8-hydroxyquinolinato) G) (1-naphtholato) aluminum, bis (8-hydroxyquinolinato) (2-naphtholato) aluminum, bis (8-hydroxyquinolinato) (phenolate) aluminum, bis (8 -Hydroxyquinolinato) (4-cyano-1-naphtholato) aluminum, bis (4-methyl-8) Hydroxyquinolinato) (1-naphtholato) aluminum, bis (5-methyl-8-hydroxyquinolinato) (2-naphtholato) aluminum, bis (5-phenyl-8-hydroxyquinolina) G) (phenolate) aluminum, bis (5-cyano-8-hydroxyquinolinato) (4-cyano-1-naphtholato) aluminum, bis (8-hydroxyquinolinato) chloroaluminum, bis Aluminum complex compounds such as (8-hydroxyquinolinato) (o-cresolato) aluminum, tris (8-hydroxyquinolinato) gallium, tris (2-methyl-8-hydroxyquinolinato) gallium , Tris (4-methyl-8-hydroxyquinolinato) gallium, tris (5-methyl-8-hydroxyquinolinato) Gallium, tris (2-methyl-5-phenyl-8-hydroxyquinolinato) gallium, bis (2-methyl-8-hydroxyquinolinato) (1-naphtholato) gallium, bis (2-methyl) -8-hydroxyquinolinato) (2-naphtholato) gallium, bis (2-methyl-8-hydroxyquinolinato) (phenolate) gallium, bis (2-methyl-8-hydroxyquinolina) -To) (4-cyano-1-naphtholato) gallium, bis (2,4-dimethyl-8-hydroxyquinolinato) (1-naphtholato) gallium, bis (2,5-dimethyl-8) -Hydroxyquinolinato) (2-naphtholato) gallium, bis (2-methyl-5-phenyl-8-hydroxyquinolinato) (phenolate) gallium, bis (2-methyl-5- Cyano-8-hydroxyquinolinato) (4-cyano-1-naphtholato) gallium, bis (2-methyl-8-hydroxyquinolinato) chlorogallium, bis (2-methyl-8-hydroxyquino) In addition to gallium complex compounds such as linato) (o-cresolato) gallium, 8-hydroxyquinolinatolithium, bis (8-hydroxyquinolinato) copper, bis (8-hydroxyquinolinato) Metal complex compounds such as manganese, bis (10-hydroxybenzo [h] quinolinato) beryllium, bis (8-hydroxyquinolinato) zinc, bis (10-hydroxybenzo [h] quinolinato) zinc It is done.

  Among the electron injection materials that can be used in the present invention, preferred nitrogen-containing five-membered ring derivatives include oxazole derivatives, thiazol derivatives, oxadiazol derivatives, thiadiazol derivatives, and triazole derivatives. Specifically, 2,5-bis (1-phenyl) -1,3,4-oxazole, 2,5-bis (1-phenyl) -1,3,4-thiazol, 2 , 5-bis (1-phenyl) -1,3,4-oxadiazol, 2- (4′-tert-butylphenyl) -5- (4 ″ -biphenyl) 1,3,4-oxadiazol, 2,5-bis (1-naphthyl) -1,3,4-oxadiazol, 1,4-bis [2- (5-phenyloxadiazolyl).) Benzene, 1,4-bis [2- ( 5-Phenyloxadiazolyl) -4-tert-butyl Nzene], 2- (4′-tert-butylphenyl) -5- (4 ″ -biphenyl) -1,3,4-thiadiazol, 2,5-bis (1-naphthyl) -1,3,4 -Thiadiazol, 1,4-bis [2- (5-phenylthiadiazolyl). ) Benzene, 2- (4′-tert-butylphenyl) -5- (4 ″ -biphenyl) -1,3,4-triazole, 2,5-bis (1-naphthyl) -1,3,4 -Triazole, 1,4-bis [2- (5-phenyltriazolyl)] benzene and the like.

  Among the electron injection materials that can be used in the present invention, particularly preferable oxadiazole derivatives include oxadiazole derivatives represented by the following general formula [12].

Formula [12]

(In the formula, Ar ^r1 and Ar ^r2 each independently represent a monovalent aromatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group which may have a substituent.)

  Examples of the monovalent nitrogen-containing aromatic heterocyclic group include 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 3-pyridyl group, 4-pyridazyl group, 2-pyrimidyl group, 4-pyrimidyl group, 5- Monovalent nitrogen-containing monocyclic aromatic heterocyclic group such as pyrimidyl group, 2-pyrazyl group, 1-imidazolyl group, 2-quinolyl group, 3-quinolyl group, 4-quinolyl group, 5-quinolyl group, 6-quinolyl Group, 7-quinolyl group, 8-quinolyl group, 2-quinazolyl group, 4-quinazolyl group, 5-quinazolyl group, 2-quinoxalyl group, 5-quinoxalyl group, 6-quinoxalyl group, 1-indolyl group, 9-caribazolyl Monovalent nitrogen-containing fused ring aromatic heterocyclic group such as a group, 2,2′-bipyridyl-3-yl group, 2,2′-bipyridyl-4-yl group, 3,3′-bipyridyl-2-yl Group, 3,3′-bipyridyl And monovalent nitrogen-containing ring-assembled aromatic heterocyclic groups such as 4-yl group, 4,4′-bipyridyl-2-yl group, and 4,4′-bipyridyl-3-yl group. The hydrogen atom on the valent nitrogen-containing aromatic heterocyclic group may be substituted with a monovalent aliphatic hydrocarbon group or a monovalent aromatic hydrocarbon group.

A preferred monovalent aromatic hydrocarbon group as Ar ^r1 and Ar ^r2 is a 1-naphthyl group optionally substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. , 2-naphthyl group, o-biphenylyl group, m-biphenylyl group, and p-biphenylyl group, and a preferable monovalent nitrogen-containing aromatic heterocyclic group is a monovalent aliphatic hydrocarbon group or 1 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 2,2′-bipyridyl-3-yl group, and 2,2′-bipyridyl-, which may be substituted with a valent aromatic hydrocarbon group 4-yl group is mentioned.

  Table 4 shows specific examples of oxadiazole derivatives that can be used in the present invention.

Table 4

  Among the electron injection materials that can be used in the present invention, a particularly preferred triazole derivative is a triazole derivative represented by the following general formula [13].

General formula [13]

(In the formula, Ar ^{t1 to} Ar ^t3 each independently represent a monovalent aromatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group which may have a substituent.)

Here, as Ar ^t1 and Ar ^t2 , preferred monovalent aromatic hydrocarbon group is phenyl which may be substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. Group, 1-naphthyl group, 2-naphthyl group, o-biphenylyl group, m-biphenylyl group, and p-biphenylyl group. Preferred monovalent nitrogen-containing aromatic heterocyclic groups include monovalent aliphatic groups. 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 2,2′-bipyridyl-3-yl group, and 2 which may be substituted with an aromatic hydrocarbon group or a monovalent aromatic hydrocarbon group , 2'-bipyridyl-4-yl group. As Ar ^t3 , preferred monovalent aromatic hydrocarbon groups include a phenyl group, which may be substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group, Examples thereof include a naphthyl group, a 2-naphthyl group, an o-biphenylyl group, an m-biphenylyl group, and a p-biphenylyl group. Preferred monovalent nitrogen-containing aromatic heterocyclic groups are monovalent aliphatic hydrocarbon groups. Or the 2-pyridyl group, 3-pyridyl group, and 4-pyridyl group which may be substituted by the monovalent | monohydric aromatic hydrocarbon group are mention | raise | lifted.

  Table 5 shows specific examples of triazole derivatives that can be used in the present invention.

Table 5

Further, among the electron injecting materials that can be used in the present invention, particularly preferred silole derivatives include silole derivatives represented by the following general formula [14].
General formula [14]

(In the formula, R ^p1 and R ^p2 are each independently a monovalent aliphatic hydrocarbon group, monovalent aromatic hydrocarbon group, or monovalent nitrogen-containing aromatic complex which may have a substituent. Ar ^{p1 to} Ar ^p4 each independently represents a monovalent aromatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group which may have a substituent, R ^p1 , The adjacent groups of R ^p2 and Ar ^{p1 to} Ar ^p4 may be linked to each other to form a ring.

Here, as R ^p1 and R ^p2 , preferred monovalent aliphatic hydrocarbon group is methyl which may be substituted with a monovalent aromatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. Group, ethyl group, propyl group, and butyl group. Preferred monovalent aromatic hydrocarbon groups are substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. And a phenyl group, an m-biphenylyl group, and a p-biphenylyl group. Preferred monovalent nitrogen-containing aromatic heterocyclic groups include a monovalent aliphatic hydrocarbon group or a monovalent aromatic carbon group. Examples thereof include a 2-pyridyl group, a 3-pyridyl group and a 4-pyridyl group, which may be substituted with a hydrogen group. In addition, as Ar ^{p1 to} Ar ^p4 , a preferable monovalent aromatic hydrocarbon group is a phenyl group which may be substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. , 1-naphthyl group, 2-naphthyl group, o-biphenylyl group, m-biphenylyl group, and p-biphenylyl group, and preferable monovalent nitrogen-containing aromatic heterocyclic groups are monovalent aliphatic A 2-pyridyl group, a 3-pyridyl group, a 4-pyridyl group, a 2,2′-bipyridyl-3-yl group, which may be substituted with a hydrocarbon group or a monovalent aromatic hydrocarbon group, and 2, A 2'-bipyridyl-4-yl group is mentioned.

  Table 6 shows specific examples of silole derivatives that can be used in the present invention.

Table 6

  Of the electron injecting materials that can be used in the present invention, preferred triarylphosphine oxide derivatives include those disclosed in JP-A-2002-63989, JP-A-2004-95221, JP-A-2004-203828, and JP-A-2004. -204140 and the triarylphosphine oxide derivative represented by the following general formula [15] can be shown.

General formula [15]

(In the formula, Ar ^{q1 to} Ar ^q3 each independently represents a monovalent aromatic hydrocarbon group which may have a substituent.)

Here, as Ar ^{q1 to} Ar ^q3 , a preferable monovalent aromatic hydrocarbon group is a phenyl group which may be substituted with a monovalent aliphatic hydrocarbon group or a monovalent nitrogen-containing aromatic heterocyclic group. 1-naphthyl group, 2-naphthyl group, o-biphenylyl group, m-biphenylyl group, and p-biphenylyl group.

  Table 7 shows specific examples of triarylphosphine oxide derivatives that can be used in the present invention.

Table 7

  Furthermore, a hole blocking material that can prevent holes from passing through the light emitting layer from reaching the electron injection layer and form a layer having excellent thin film formability is used for the hole blocking layer. Examples of such hole blocking materials include aluminum complex compounds such as bis (8-hydroxyquinolinato) (4-phenylphenolato) aluminum, and bis (2-methyl-8-hydroxyquinolina). -To) (4-phenylphenolato) gallium complex compounds such as gallium, and nitrogen-containing condensed aromatic compounds such as 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP). .

The light emitting layer of the organic EL device of the present invention preferably has the following functions.
Injection function; function transport function capable of injecting holes from the anode or hole injection layer when an electric field is applied, and electrons from the cathode or electron injection layer; Light emitting function: A function that provides a field for recombination of electrons and holes and connects it to light emission. However, there is a difference between the ease of hole injection and the ease of electron injection. In addition, the transport ability represented by the mobility of holes and electrons may be large or small, but it is preferable to move one of the charges.

  The light-emitting material of the organic EL element is mainly an organic compound, and specifically, the following compounds are used depending on a desired color tone.

  For example, when obtaining violet light emission from the ultraviolet region, a compound represented by the following general formula [16] is preferably used.

Formula [16]

(In the formula, X1 represents a group represented by the following general formula [17], and X2 represents any one of a phenyl group, a 1-naphthyl group, and a 2-naphthyl group.]

General formula [17]

(In the formula, m represents an integer of 2 to 5)

  The phenyl group, 1-naphthyl group, 2-naphthyl group, and phenylene group represented by X1 and X2 in the general formula [16] are one or more alkyl groups having 1 to 4 carbon atoms and 1 to 4 carbon atoms. It may be substituted with a substituent such as an alkoxyl group, a hydroxyl group, a sulfonyl group, a carbonyl group, an amino group, a dimethylamino group or a diphenylamino group. Moreover, when there are a plurality of these substituents, they may be bonded to each other to form a ring. Furthermore, the phenylene group represented by X1 is preferably bonded at the para position because it has good bonding properties and can easily form a smooth deposited film. Specific examples of the compound represented by the general formula [16] are as follows (where Ph represents a phenyl group).

  Among these compounds, p-quarter-phenyl derivatives and p-quinkphenyl derivatives are particularly preferable.

  Further, in order to obtain light emission in the visible region, particularly blue to green, for example, fluorescent whitening agents such as benzothiazole, benzimidazole, benzoxazole, metal chelated oxinoid compounds, styrylbenzene System compounds can be used. Specific examples of these compounds include, for example, compounds disclosed in JP-A-59-194393. Still other useful compounds are listed in Chemistry of Synthetic Soybean (1971) pages 628-637 and 640.

  As the metal chelated oxinoid compound, for example, compounds disclosed in JP-A-63-295695 can be used. As typical examples, 8-hydroxyquinoline-based metal complexes such as tris (8-quinolinol) aluminum, dilithium epinetridione and the like can be mentioned as suitable compounds.

  As the styrylbenzene compound, for example, those disclosed in European Patent No. 0319881 and European Patent No. 0373582 can be used. And the distyrylpyrazine derivative currently disclosed by Unexamined-Japanese-Patent No. 2-252793 can also be used as a material of a light emitting layer. In addition, polyphenyl compounds disclosed in EP 0387715 can also be used as a material for the light emitting layer.

  Further, in addition to the above-described optical brightener, metal chelated oxinoid compound, styrylbenzene compound, etc., for example, 12-phthaloperinone (J. Appl. Phys., Vol. 27, L713 (1988)), 1, 4-diphenyl-1,3-butadiene, 1,1,4,4-tetraphenyl-1,3-butadiene (above Appl. Phys. Lett., 56, L799 (1990)), naphthalimide derivatives ( Disclosed in JP-A-2-305886), perylene derivatives (JP-A-2-189890), oxadiazol derivatives (JP-A-2-21691, or the 38th Applied Physics Related Conference) by Hamada et al. Oxadiazol derivatives), aldazine derivatives (JP-A-2-220393), pyrazirine Conductors (JP-A-2-220394), cyclopentadiene derivatives (JP-A-2-289675), pyrrolopyrrole derivatives (JP-A-2-29691), styrylamine derivatives (Appl. Phys. Lett., No. 2). 56, L799 (1990), coumarin compounds (Japanese Patent Laid-Open No. 2-191694), international patent publications WO90 / 13148 and Appl. Phys. Lett., Vol 58, 18, P1982 (1991). Polymer compounds, 9,9 ′, 10,10′-tetraphenyl-2,2′-bianthracene, PPV (polyparaphenylene vinylene) derivatives, polyfluorene derivatives and copolymers thereof, for example, the following general formula [18] to those having the structure of the general formula [20],

General formula [18]

(In the formula, R ^x1 and R ^X2 each independently represent a monovalent aliphatic hydrocarbon group, and n1 represents an integer of 3 to 100.)

General formula [19]

(In the formula, R ^x3 and R ^X4 each independently represent a monovalent aliphatic hydrocarbon group, and n2 and n3 each independently represent an integer of 3 to 100.)

General formula [20]

(In the formula, R ^X5 and R ^X6 each independently represent a monovalent aliphatic hydrocarbon group, n4 and n5 each independently represent an integer of 3 to 100, and Ph represents a phenyl group.)
9,10-bis (N- (4- (2-phenylvinyl-1-yl) phenyl) -N-phenylamino) anthracene or the like can also be used as a material for the light emitting layer. Furthermore, a phenylanthracene derivative represented by the following general formula [21] as disclosed in JP-A-8-12600 can also be used as a light emitting material.

Formula [21]

A1-L-A2

(In the formula, A1 and A2 each independently represent a monophenylanthryl group or a diphenylanthryl group, which may be the same or different. L represents a single bond or a divalent linking group. )

  Here, the divalent linking group represented by L is preferably a divalent monocyclic or condensed ring aromatic hydrocarbon group which may have a substituent. In particular, the phenylanthracene derivatives represented by the following general formulas [22] to [23] are preferable.

General formula [22]

(In the formula, R ^{Z1 to} R ^Z4 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, an alkoxyl group, an aryloxy group, a diarylamino group, A monovalent aliphatic heterocyclic group and a monovalent aromatic heterocyclic group, which may be the same or different, r1 to r4 each independently represents an integer of 0 or 1 to 5; When r1 to r4 are each independently an integer of 2 or more, R ^Z1 , R ^Z2 , R ^Z3 , R ^Z4 may be the same or different, and R ^Z1 , ^{Z2 to} each other, ^{RZ3 to} each other, and ^{RZ4 to} each other may form a ring, and L1 represents a single bond or a divalent monocyclic or condensed ring aromatic hydrocarbon group which may have a substituent. The divalent monocyclic or condensed ring aromatic hydrocarbon group which may have a substituent is An alkylene group, —O—, —S—, or —NR— (wherein R represents an alkyl group or an aryl group) may be interposed.

General formula [23]

(Wherein R ^Z5 and R ^Z6 are each independently a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, an alkoxyl group, an aryloxy group, a diarylamino group, A monovalent aliphatic heterocyclic group and a monovalent aromatic heterocyclic group, which may be the same or different, and r5 and r6 each independently represents 0 or an integer of 1 to 5. When r5 and r6 are each independently an integer of 2 or more, R ^Z5 and R ^Z6 may be the same or different, and R ^Z5 and R ^Z6 are bonded to form a ring. L2 represents a divalent monocyclic or condensed aromatic hydrocarbon group which may have a single bond or a substituent, and may represent a divalent monocyclic or condensed which may have a substituent. The ring aromatic hydrocarbon group is an alkylene group, -O-, -S- or -NR- (wherein R is an alkyl group or ants - represents Le group) or may be mediated).

  Of the general formula [23], phenylanthracene derivatives represented by the following general formula [24] to general formula [25] are more preferable.

General formula [24]

(Wherein R ^{Z11 to} R ^Z30 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, an alkoxyl group, an aryloxy group, a diarylamino group, Represents a monovalent aliphatic heterocyclic group and a monovalent aromatic heterocyclic group, which may be the same or different, and R ^{Z11 to} R ^Z30 are formed by connecting adjacent groups to each other; (K1 represents an integer of 0 to 3).

Formula [25]

(In the formula, R ^{Z31 to} R ^Z50 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, an alkoxyl group, an aryloxy group, a diarylamino group, Represents a monovalent aliphatic heterocyclic group and a monovalent aromatic heterocyclic group, which may be the same or different, and R ^{Z31 to} R ^Z50 are formed by connecting adjacent groups to each other; (K2 represents an integer of 0 to 3).

  Of the general formula [25], a phenylanthracene derivative represented by the following general formula [26] is more preferable.

General formula [26]

(Wherein R ^{Z51 to} R ^Z60 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, an alkoxyl group, an aryloxy group, a diarylamino group, Represents a monovalent aliphatic heterocyclic group and a monovalent aromatic heterocyclic group, which may be the same or different, and R ^{Z51 to} R ^Z60 are formed by connecting adjacent groups to each other; (K3 represents an integer of 0 to 3).

  Specific examples of the general formula [26] to general formula [27] include the following compounds.

  Furthermore, the following compounds are also given as specific examples.

  An amine compound represented by the following general formula [27] is also useful as a light emitting material.

General formula [27]

(In the formula, h is a valence and represents an integer of ^{1 to} 6. E ¹ is an n-valent aromatic hydrocarbon group, E ² is a dialkylamino group, a diallylamino group, or an alkylarylamino group. Represents an amino group selected from

Here, the base structure of the N-valent aromatic hydrocarbon group represented by E ¹ includes naphthalene, anthracene, 9-phenylanthracene, 9,10-diphenylanthracene, naphthacene, pyrene, perylene, biphenyl, binaphthyl, and bianthryl. Preferably, the amino group represented by E ¹ is preferably a diarylamino group. N is preferably 1 to 4, and most preferably 2. Of the general formula [27], amine compounds represented by the following general formula [28] to general formula [30] are particularly preferable.

General formula [28]

(Wherein R ^{y1 to} R ^y8 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^y1 to R ^y8, at least one, dialkylamino group, diaryl - arylamino group And R ^{y1 to} R ^y8 may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [29]

( ^Wherein R ^{y11 to} R ^y20 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^y11 to R ^y20, at least one, dialkylamino group, diaryl - arylamino group And R ^{y11 to} R ^y20 may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [30]

( ^Wherein R ^{y21 to} R ^y34 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^y21 to R ^Y34, at least one, dialkylamino group, diaryl - arylamino group ^{And Ry21 to Ry34} may be the same or different, and adjacent groups may be linked to form a ring.)

Formula [31]

( ^Wherein R ^{y35 to} R ^y52 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^y35 to R ^y52, at least one, dialkylamino group, diaryl - arylamino group And R ^{y35 to} R ^y52 may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [32]

( ^Wherein R ^{y53 to} R ^y64 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^y53 to R ^Y64, at least one, dialkylamino group, diaryl - arylamino group And R ^{y53 to} R ^y64 may be the same or different, and adjacent groups may be linked to form a ring.)

Formula [33]

( ^Wherein R ^{y65 to} R ^y74 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^Y65 to R ^Y74, at least one, dialkylamino group, diaryl - arylamino group And R ^{y65 to} R ^y74 may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [34]

( ^Wherein R ^{y75 to} R ^y86 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^Y75 to R ^Y86, at least one, dialkylamino group, diaryl - arylamino group ^{And Ry75 to Ry86} may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [35]

( ^Wherein R ^{y87 to} R ^y96 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of ^R y87 ~R y96, at least one, dialkylamino group, diaryl - arylamino group ^{And Ry87 to Ry96} may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [36]

( ^Wherein R ^{y97 to} R ^y110 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of R ^Y97 to R ^y110, at least one, dialkylamino group, diaryl - arylamino group ^{And Ry97 to Ry110} may be the same or different, and adjacent groups may be linked to form a ring.)

General formula [37]

( ^Wherein R ^{y111 to} R ^y128 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an alkoxyl group, an aryloxy group, a monovalent aliphatic heterocyclic group, or a monovalent aromatic group. heterocyclic group or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of ^R y111 ~R y128, at least one, dialkylamino group, diaryl - arylamino group And R ^{y111 to} R ^y128 may be the same or different, and adjacent groups may be linked to form a ring.)

  The amine compounds of the general formula [34] and the general formula [37] described above can be preferably used when yellow to red light emission is obtained. Specific examples of the amine compounds represented by the general formulas [34] to [37] described above include compounds having the following structure (where Ph represents a phenyl group).

  Further, in the general formula [34] to general formula [37], a compound containing at least one styryl group represented by the following general formula [38] to general formula [39] instead of an amino group (for example, EP 0388768, JP-A-3-231970, etc.) can also be suitably used as the light emitting material.

General formula [38]

( ^Wherein R ^{y129 to} R ^y131 each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, or a monovalent aromatic hydrocarbon group. R ^{y129 to} R ^y131 are formed by connecting adjacent groups to each other. And may form a ring.)

General formula [38]

( ^Wherein R ^{y132 to} R ^y138 each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or a monovalent aromatic hydrocarbon group. R ^{y134 to} R ^y138 each independently represents a hydrogen atom, alkyl group, a cycloalkyl group, a monovalent aromatic hydrocarbon group, or a dialkylamino group, diaryl - arylamino group, alkylaryl - represents an amino group selected from arylamino groups, of ^R y134 ~R y138, at least one is a dialkylamino group, diaryl - arylamino group, alkylaryl - arylamino amino group selected from the group ^.R y132 ~R y138 is between adjacent groups are connected, may form a ring. )

  Specific examples of the compound containing at least one styryl group represented by the general formula [37] to general formula [38] described above can include compounds having the following structure (where Ph represents a phenyl group): .

In addition, the general formula (Rs-Q) _2- Al-O-L3 (wherein L3 is a hydrocarbon having 6 to 24 carbon atoms including a phenyl moiety) described in JP-A-5-258862, etc. O-L3 is a phenolate ligand, Q is a substituted 8-quinolinolato ligand, Rs is bonded to an aluminum atom with more than two substituted 8-quinolinolato ligands. And a bis (2-methyl-8-quinolinolato) compound, which represents an 8-quinolinolato ring substituent selected so as to prevent steric hindrance. (Para-phenylphenolato) aluminum (III), bis (2-methyl-8-quinolinolato) (1-naphtholato) aluminum (III) and the like.

  In addition, there is a method for obtaining a high-efficiency blue and green mixed emission using doping according to Japanese Patent Laid-Open No. 6-9953. In this case, examples of the host include the light emitting material described above, and examples of the dopant include strong fluorescent dyes from blue to green, for example, coumarins or fluorescent dyes similar to those used as the host. Specifically, a luminescent material having a distyryl arylene skeleton as a host, particularly preferably 4,4′-bis (2,2-diphenylvinyl) biphenyl, and diphenylaminovinylarylene as a dopant, particularly preferably, for example, N , N-diphenylaminovinylbenzene.

Although there is no restriction | limiting in particular as a light emitting layer which obtains white light emission, The following can be used.
The energy level of each layer of the organic EL laminated structure is defined and light is emitted using tunnel injection (European Patent No. 0390551).
Similarly, a white light emitting element is described as an example of an element using tunnel injection (Japanese Patent Laid-Open No. 3-230584).
A light-emitting layer having a two-layer structure is described (JP-A-2-220390 and JP-A-2-216790).
A structure in which a light emitting layer is divided into a plurality of materials each having a different emission wavelength (Japanese Patent Laid-Open No. 4-51491).
A structure in which a blue phosphor (fluorescent peak 380 to 480 nm) and a green phosphor (480 to 580 nm) are laminated and a red phosphor is further contained (Japanese Patent Laid-Open No. 6-207170).
The blue light emitting layer contains a blue fluorescent dye, the green light emitting layer has a region containing a red fluorescent dye, and further contains a green phosphor (Japanese Patent Laid-Open No. 7-142169).
Among these, those having the above-described configuration are particularly preferable.

  Furthermore, for example, the following known compounds are preferably used as the light emitting material (where Ph represents a phenyl group).

  In the organic electroluminescence device of the present invention, a phosphorescent material can be used. Examples of phosphorescent materials or doping materials that can be used in the organic electroluminescence device of the present invention include, for example, organometallic complexes, in which the metal atom is usually a transition metal, preferably the fifth period or In the 6th period, the group includes elements of groups 6 to 11, more preferably groups 8 to 10. Specific examples include iridium and platinum. Examples of the ligand include 2-phenylpyridine and 2- (2'-benzothienyl) pyridine, and the carbon atom on these ligands is directly bonded to the metal. Another example is a porphyrin or tetraazaporphyrin ring complex, and the central metal is platinum. For example, the following known compounds are suitably used as the phosphorescent material (where Ph represents a phenyl group).

Furthermore, the material used for the anode of the organic EL device of the present invention is preferably a material having a work function (4 eV or more) metal, alloy, electrically conductive compound or a mixture thereof as an electrode substance. Specific examples of such an electrode substance include metals such as Au, and conductive materials such as CuI, ITO, SNO ₂ , and ZNO. In order to form this anode, a thin film can be formed from these electrode materials by a method such as vapor deposition or sputtering. The anode desirably has such a characteristic that when light emitted from the light emitting layer is extracted from the anode, the transmittance of the anode for light emission is greater than 10%. The sheet resistance of the anode is preferably several hundred Ω / □ or less. Further, although the film thickness of the anode depends on the material, it is usually selected in the range of 10 Nm to 1 μm, preferably 10 to 200 nm.

  The material used for the cathode of the organic EL device of the present invention is a material having a small work function (4 eV or less) metal, alloy, electrically conductive compound and a mixture thereof as an electrode substance. Specific examples of such electrode materials include sodium, sodium-potassium alloy, magnesium, lithium, magnesium / silver alloy, aluminum / aluminum oxide, aluminum / lithium alloy, indium, and rare earth metals. The cathode can be produced by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering. Here, when light emitted from the light-emitting layer is extracted from the cathode, the transmittance of the cathode for light emission is preferably greater than 10%. The sheet resistance as the cathode is preferably several hundred Ω / □ or less, and the film thickness is usually 10 nm to 1 μm, preferably 50 to 200 Nm.

  Regarding the method for producing the organic EL device of the present invention, an anode, a light emitting layer, a hole injection layer as necessary, and an electron injection layer as necessary are formed by the above materials and methods, and finally a cathode is formed. do it. Moreover, an organic EL element can also be produced from the cathode to the anode in the reverse order.

  This organic EL element is manufactured on a translucent substrate. This translucent substrate is a substrate that supports the organic EL element, and for the translucency, it is desirable that the transmittance of light in the visible region of 400 to 700 nm is 50% or more, preferably 90% or more, Further, it is preferable to use a smooth substrate.

  These substrates have mechanical and thermal strengths and are not particularly limited as long as they are transparent. For example, glass plates, synthetic resin plates and the like are preferably used. Examples of the glass plate include plates made of soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, quartz, and the like. Examples of the synthetic resin plate include polycarbonate resin, acrylic resin, polyethylene terephthalate resin, polyethersulfide resin, and polysulfone resin.

  As a method for forming each layer of the organic EL device of the present invention, a dry film forming method such as vacuum deposition, electron beam irradiation, sputtering, plasma, ion plating, or spin coating, dipping, flow coating, etc. Wet film-forming methods such as the ink jet method, methods for depositing a light emitter on a donor film, and Japanese Patent Application Laid-Open No. 2002-534782 and STLee, et al., Proceedings of SID'02, p.784 (2002) Any of the laser thermal transfer methods described (Laser Induced Thermal Imaging, also referred to as LITI method) can be applied, and the organic layer is preferably a molecular deposition film, where the molecular deposition film is used. A thin film formed by deposition from a material compound in a gas phase state or a film formed by solidification from a material compound in a solution state or a liquid phase state. The film can be classified from the thin film (molecular accumulation film) formed by the LB method by the difference in the aggregation structure, the higher order structure, and the functional difference caused by the aggregation structure, and JP-A-57-51781. The organic layer can also be formed by dissolving a binder such as a resin and a material compound in a solvent to form a solution and then reducing the film by a spin coating method or the like. The film thickness of each layer is not particularly limited, but if the film thickness is too thick, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. Therefore, even if an electric field is applied, it is difficult to obtain sufficient light emission luminance, so that the thickness of each layer is preferably in the range of 1 nm to 1 μm, but more in the range of 10 nm to 0.2 μm. preferable.

  Further, in order to improve the stability of the organic EL element with respect to temperature, humidity, atmosphere and the like, a protective layer may be provided on the surface of the element, or the entire element may be covered or sealed with a resin or the like. In particular, when the entire element is covered or sealed, a photocurable resin that is cured by light is preferably used.

  The current applied to the organic EL element of the present invention is usually a direct current, but a pulse current or an alternating current may be used. The current value and voltage value are not particularly limited as long as the element is not damaged, but considering the power consumption and life of the element, it is desirable to emit light efficiently with as little electrical energy as possible.

  The organic EL device driving method of the present invention can be driven not only by the passive matrix method but also by the active matrix method. Further, the method for extracting light from the organic EL device of the present invention is applicable not only to the method of bottom emission for extracting light from the anode side but also to the method of top emission for extracting light from the cathode side. These methods and techniques are described in Shinji Kido, “All about organic EL”, published by Nihon Jitsugyo Shuppansha (published in 2003).

  Furthermore, the organic EL element of the present invention may adopt a microcavity structure. This is because the organic EL element has a structure in which the light emitting layer is sandwiched between the anode and the cathode, and the emitted light causes multiple interference between the anode and the cathode, but the reflectance and transmission of the anode and the cathode. This is a technology that actively uses the multiple interference effect and controls the emission wavelength extracted from the device by appropriately selecting the optical characteristics such as the rate and the film thickness of the organic layer sandwiched between them. . Thereby, it is also possible to improve the emission chromaticity. For the mechanism of this multiple interference effect, see J.A. Yamada et al., AM-LCD Digest of Technical Papers, OD-2, p. 77-80 (2002).

  As described above, the organic EL device using the carbazole-containing amine compound of the present invention can emit light for a long time with a low driving voltage. Therefore, this organic EL element is used as a flat panel display such as a wall-mounted television and various flat light emitters, as well as a light source such as a copying machine and a printer, a light source such as a liquid crystal display and instruments, a display board, a marker lamp, etc. Application to is considered.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples at all. Moreover,% represents weight% in description.

Example 1
Production Method of Compound (1) The synthesis scheme is as shown in formulas 1 to 3.

Formula 1

Formula 2

Formula 3

  Hereinafter, description will be made with reference to Equations 1 to 3.

Method of synthesizing intermediate (III) In a four-necked flask under nitrogen flow, 10 g of nitrobenzene, 10 g of N, N-diphenylamine, 30 g of 4,4′-diodobiphenyl, and 9.4 g of anhydrous potassium carbonate, copper 0.8 g of the powder was heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 8 g of white fluorescent powder. It was confirmed to be compound (III) by molecular weight analysis by FD-MS.

Synthesis Method of Intermediate (VI) 6.4 g of 3-bromo-9-phenylcarbazole (IV), aniline in 10 g of 1,3-dimethyl-2-indazolidinone in a 4-neck flask under a nitrogen stream 2.3 g, 2.0 g of anhydrous potassium carbonate, and 0.2 g of copper powder were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 5 g of a white solid. It was confirmed to be compound (VI) by molecular weight analysis by FD-MS.

Synthesis Method of Compound (1) In a four-necked flask under a nitrogen stream, 7.4 g of intermediate (iii), 5.5 g of intermediate (VI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. As a crude product, (VII) (= compound (1)) was obtained in 9.2 g (yield 85%). The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Parkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) analysis of this compound, it was found to be compound (1). confirmed.
The results of elemental analysis of the product are shown below, and the ¹ H-NMR spectrum is shown in FIG.

Elemental analysis results
Calculated as C ₄₈ H ₃₅ N ₃ (%): C: 88.18 H: 5.40 N: 6.43
Actual value (%): C: 88.21 H: 5.38 N: 6.41
The 3-bromo-9-phenylcarbazole (IV) used for the synthesis of the compound (1) is carbazol 3 with reference to the Industrial Chemical Journal, 1967, volume 70, page 63. Then, brominated at the position, and then synthesized by reacting iodine benzene by the Ullman method using a copper catalyst was used.

Example 2
Production Method of Compound (2) The synthesis scheme is as shown in formulas 4-5.

Formula 4

Formula 5

  Hereinafter, description will be made with reference to equations 4-5.

Method of synthesizing intermediate (IX) In a 4-necked flask under nitrogen flow, 10 g of nitrobenzene, 13 g of N-phenyl-1-naphthylamine, 30 g of 4,4′-diodobiphenyl, and 9.4 g of anhydrous potassium carbonate Then, 0.8 g of copper powder was heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 9 g of light yellow fluorescent powder. It was confirmed to be compound (IX) by molecular weight analysis by FD-MS.

Synthesis Method of Compound (2) Under a nitrogen stream, in a four-necked flask, 7.9 g of intermediate (IX), 5.5 g of intermediate (VI) obtained by Formula 2, 0.35 g of palladium acetate, tri-tert -1.34 g of butylphosphine and 2.0 g of sodium tert-butoxide were placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.1 g (yield 72%) of (X) (= compound (2)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found that it was compound (2). confirmed. The results of elemental analysis of the product are shown below, and the ¹ H-NMR spectrum is shown in FIG.

Elemental analysis results
Calculated as C ₅₂ H ₃₇ N ₃ (%): C: 88.73 H: 5.30 N: 5.97
Actual value (%): C: 88.56 H: 5.38 N: 6.03

Example 3
Production Method of Compound (3) The synthesis scheme is as shown in formulas 6-7.

Equation 6

Equation 7

  Hereinafter, description will be given with reference to Equations 6-7.

Synthesis Method of Intermediate (XII) 6.4 g of 3-bromo-9-phenylcarbazole (IV) in 10 g of 1,3-dimethyl-2-imidazolidinone in a 4-neck flask under a nitrogen stream 1-naphthylamine 3.5 g, anhydrous potassium carbonate 2.0 g, and copper powder 0.2 g were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 6 g of a white solid. It was confirmed to be compound (XII) by molecular weight analysis by FD-MS.

Method of synthesizing compound (3) In a four-necked flask under nitrogen flow, 7.4 g of intermediate (iii) obtained from formula 1, 6.0 g of intermediate (XII), 0.35 g of palladium acetate, tri-tert -1.34 g of butylphosphine and 2.0 g of sodium tert-butoxide were placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 7.3 g (yield 65%) of (XIII) (= compound (3)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found that it was compound (3). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₃ H ₃₈ N ₃ (%): C: 88.80 H: 5.34 N: 5.86
Actual value (%): C: 88.61 H: 5.38 N: 6.01

Example 4
Method for Producing Compound (4) The synthesis scheme is shown in Formula 8.

Equation 8

  Hereinafter, description will be made with reference to Equation 8.

Synthesis Method of Compound (4) Under a nitrogen stream, in a four-necked flask, 7.9 g of intermediate (IX) obtained from formula 4, 6.0 g of intermediate (XII), 0.35 g of palladium acetate, tri-tert -1.34 g of butylphosphine and 2.0 g of sodium tert-butoxide were placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.5 g (yield 71%) of (XIV) (= compound (4)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (4). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₆ H ₃₉ N ₃ (%): C: 89.21 H: 5.21 N: 5.57
Actual value (%): C: 89.25 H: 5.36 N: 5.39

Example 5
Production Method of Compound (5) The synthesis scheme is as shown in formulas 9-11.

Equation 9

Equation 10

Equation 11

  Hereinafter, description will be made with reference to Equations 9 to 11.

Method of synthesizing intermediate (XVI) Under a nitrogen stream, in a four-necked flask, in 10 g of nitrobenzene, 13 g of N, N-bis (p-biphenyl) amine, 30 g of 4,4′-diodobiphenyl, and anhydrous carbonic acid 9.4 g of potassium and 0.8 g of copper powder were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 9 g of light yellow fluorescent powder. It was confirmed to be the compound (XVI) by molecular weight analysis by FD-MS.

Synthesis method of intermediate (XVIII) 6.4 g of 3-bromo-9-phenylcarbazole (IV) in 10 g of 1,3-dimethyl-2-imidazolidinone in a 4-neck flask under a nitrogen stream Then, 4.2 g of 4-aminobiphenyl, 2.0 g of anhydrous potassium carbonate, and 0.2 g of copper powder were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 4.6 g of a white solid. It was confirmed to be compound (XVIII) by molecular weight analysis by FD-MS.

Synthesis Method of Compound (5) Under a nitrogen stream, 9.6 g of intermediate (XVI), 6.6 g of intermediate (XVIII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine in a four-necked flask Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.7 g (yield 62%) of (XIX) (= compound (5)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis of this compound (manufactured by Parkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W), it was found to be compound (5). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₆₇ H ₅₁ N ₃ (%): C: 89.60 H: 5.72 N: 4.68
Actual value (%): C: 89.50 H: 5.48 N: 5.02

Example 6
Production Method of Compound (6) The synthesis scheme is as shown in formulas 12-13.

Formula 12

Equation 13

  Hereinafter, description will be made with reference to Expressions 12 to 13.

Method of synthesizing intermediate (XXI) In a 4-necked flask under nitrogen flow, 10 g of nitrobenzene, 15 g of N-phenyl-Np-biphenylylamine, 30 g of 4,4′-diodobiphenyl, and anhydrous carbonic acid 9.4 g of potassium and 0.8 g of copper powder were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 10 g of a powder having pale yellow fluorescence. It was confirmed to be compound (XXI) by molecular weight analysis by FD-MS.

Synthesis method of compound (6) In a four-necked flask under nitrogen stream, 8.3 g of intermediate (XXI), 6.5 g of intermediate (XVIII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. As a crude product, (XXIII) (= compound (6)) was obtained in 8.9 g (yield 67%). The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) analysis of this compound, it was found to be compound (6). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₆₀ H ₄₃ N ₃ (%): C: 89.41 H: 5.38 N: 5.21
Actual value (%): C: 89.25 H: 5.35 N: 6.40

Example 7
Production Method of Compound (7) The synthesis scheme is as shown in formulas 14-15.

Equation 14

Equation 15

  Hereinafter, description will be made with reference to Equations 14-15.

Method of synthesizing intermediate (XXV) In a 4-necked flask under nitrogen flow, 10 g of nitrobenzene, 20 g of N-phenyl-N-9-phenanthrylamine, 30 g of 4,4′-diodobiphenyl, and anhydrous 9.4 g of potassium carbonate and 0.8 g of copper powder were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 12 g of light yellow fluorescent powder. It was confirmed to be compound (XXV) by molecular weight analysis by FD-MS.

Synthesis method of compound (7) Under a nitrogen stream, in a four-necked flask, 8.7 g of intermediate (XXV), 6.6 g of intermediate (VI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.5 g (yield 63%) of (XXVI) (= compound (7)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (7). confirmed. The results of elemental analysis of the product are shown below, and the ¹ H-NMR spectrum is shown in FIG.

Elemental analysis results
Calculated as C ₅₆ H ₃₉ N ₃ (%): C: 89.21 H: 5.21 N: 5.57
Actual value (%): C: 89.31 H: 5.38 N: 5.31

Example 8
Production Method of Compound (8) The synthesis scheme is as shown in formulas 16-17.

Equation 16

Equation 17

  Hereinafter, description will be made with reference to Equations 16 to 17.

Method of synthesizing intermediate (XXVIII) 18 g of N- (1-naphthyl) -N- (2-naphthyl) amine, 4 g, 4′-diodobiphenyl in 10 g of nitrobenzene in a 4-neck flask under a nitrogen stream 30 g, anhydrous potassium carbonate 9.4 g, and copper powder 0.8 g were heated and stirred at 200 ° C. for 10 hours. After completion of the reaction, extraction was performed with 100 g of toluene, and the toluene layer was concentrated. Purification was performed by column chromatography using silica gel to obtain 10 g of a powder having pale yellow fluorescence. It was confirmed to be compound (XXVIII) by molecular weight analysis by FD-MS.

Synthesis method of compound (8) Under a nitrogen stream, in a four-necked flask, 8.7 g of intermediate (XXVIII), 6.2 g of intermediate (XXIX), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 7.8 g (yield 60%) of (XXX) (= compound (8)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (8). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₆₀ H ₄₁ N ₃ (%): C: 89.63 H: 5.14 N: 5.23
Actual value (%): C: 89.50 H: 5.23 N: 5.27

Example 9
Method for Producing Compound (9) The synthesis scheme follows Formula 18.

Equation 18

Synthesis Method of Compound (9) In a four-necked flask under a nitrogen stream, 7.9 g of intermediate (XXXI), 6.1 g of intermediate (XXIX), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 7.8 g (yield 65%) of (XXXII) (= compound (9)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (9). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₆ H ₃₉ N ₃ (%): C: 89.21 H: 5.21 N: 5.57
Actual value (%): C: 89.02 H: 5.38 N: 5.60

Example 10
Method for Producing Compound (10) The synthesis scheme follows Formula 19.

Equation 19

Synthesis method of compound (10) In a four-necked flask under a nitrogen stream, 8.7 g of intermediate (XXXIII), 7.0 g of intermediate (XXIV), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.2 g (yield 60%) of (XXXV) (= compound (10)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (10). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₆₄ H ₄₃ N ₃ (%): C: 90.01 H: 5.07 N: 4.92
Actual value (%): C: 90.20 H: 5.13 N: 4.67

Example 11
Method for Producing Compound (11) The synthesis scheme follows Formula 20.

Equation 20

Synthesis Method of Compound (11) In a four-necked flask under a nitrogen stream, 8.7 g of intermediate (XXXVI), 7.0 g of intermediate (XXXVII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.3 g (yield 62%) of (XXXVIII) (= compound (11)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (11). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₆₄ H ₄₃ N ₃ (%): C: 90.01 H: 5.07 N: 4.92
Actual value (%): C: 90.12 H: 5.18 N: 4.70

Example 12
Method for Producing Compound (12) The synthesis scheme follows Formula 21.

Equation 21

Synthesis Method of Compound (12) In a four-necked flask under nitrogen flow, 7.3 g of intermediate (XXXIX), 5.6 g of intermediate (XL), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 6.5 g (yield 60%) of (XL) (= compound (12)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (12). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
As C ₅₀ H ₃₉ N ₃ Calculated value (%): C: 88.07 H: 5.77 N: 6.16
Actual value (%): C: 88.21 H: 5.81 N: 5.98

Example 13
Method for Producing Compound (13) The synthesis scheme follows Formula 22.

Equation 22

Synthesis method of compound (13) Under a nitrogen stream, in a four-necked flask, 7.4 g of intermediate (XLII), 5.6 g of intermediate (XLIII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. As a crude product, (XLIV) (= compound (13)) was obtained in 7.0 g (yield 64%). The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (13). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₄₈ H ₃₃ F ₂ N ₃ (%): C: 83.58 H: 4.82 F: 5.51 N: 6.09
Actual value (%): C: 83.63 H: 4.75 F: 5.46 N: 6.16

Example 14
Method for Producing Compound (14) The synthesis scheme follows Formula 23.

Equation 23

Synthesis method of compound (14) In a four-necked flask under nitrogen stream, 7.6 g of intermediate (XLV), 5.8 g of intermediate (XLVI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 6.9 g (yield 61%) of (XLVII) (= compound (14)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (14). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₀ H ₃₉ N ₃ O ₂ (%): C: 84.12 H: 5.51 N: 5.89 O: 4.48
Actual value (%): C: 84.18 H: 5.42 N: 5.68 O: 4.72

Example 15
Method for Producing Compound (15) The synthesis scheme follows Formula 23.

Equation 23

Synthesis method of compound (15) In a four-necked flask under nitrogen flow, 7.2 g of intermediate (XLVIII), 5.4 g of intermediate (XLIX), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 6.5 g (yield 62%) of (L) (= compound (15)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (15). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₄₆ H ₃₃ N ₅ (%): C: 84.25 H: 5.07 N: 10.68
Actual value (%): C: 84.21 H: 5.18 N: 10.61

Example 16
Method for Producing Compound (16) The synthesis scheme follows Formula 24.

Formula 24

Synthesis Method of Compound (16) In a four-necked flask under a nitrogen stream, 7.2 g of intermediate (LI), 5.4 g of intermediate (LII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 6.8 g (yield 63%) of (LIII) (= compound (16)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis of this compound (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W), it was found to be compound (16). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₄₄ H ₃₁ N ₃ S ₂ (%): C: 79.37 H: 4.69 N: 6.31 S: 9.63
Actual value (%): C: 79.40 H: 4.65 N: 6.25 S: 9.70

Example 17
Method for Producing Compound (17) The synthesis scheme follows Formula 25.

Equation 25

Synthesis method of compound (17) In a four-necked flask under a nitrogen stream, 7.1 g of intermediate (iii), 5.5 g of intermediate (LIV), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.7 g (yield 82%) of (LV) (= compound (17)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (17). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₄₉ H ₃₇ N ₃ (%): C: 88.12 H: 5.58 N: 6.29
Actual value (%): C: 88.09 H: 5.38 N: 6.53

Example 18
Method for Producing Compound (18) The synthesis scheme follows Formula 26.

Equation 26

Synthesis Method of Compound (18) In a four-necked flask under a nitrogen stream, 7.1 g of intermediate (iii), 5.6 g of intermediate (LVI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.7 g (yield 81%) of (LV) (= compound (18)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (18). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₄₈ H ₃₄ FN ₃ (%): C: 85.82 H: 5.10 F: 2.83 N: 6.25
Actual value (%): C: 85.75 H: 5.12 F: 2.80 N: 6.35

Example 19
Method for Producing Compound (19) The synthesis scheme follows Formula 27.

Equation 27

Synthesis method of compound (19) In a four-necked flask under nitrogen stream, 7.1 g of intermediate (iii), 6.5 g of intermediate (LVIII), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 8.8 g (yield 76%) of (LIX) (= compound (19)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (19). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₄ H ₃₉ N ₃ (%): C: 88.86 H: 5.39 N: 5.76
Actual value (%): C: 88.72 H: 5.28 N: 6.00

Example 23
Method for Producing Compound (23) The synthesis scheme follows Formula 31.

Formula 31

Synthesis method of compound (23) In a four-necked flask under nitrogen flow, 10.0 g of intermediate (LXVII), 5.3 g of intermediate (VI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 5.6 g (yield 43%) of (LXVIII) (= compound (23)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. According to elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found to be compound (23). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₈₀ H ₄₄ N ₄ (%): C: 87.77 H: 5.40 N: 6.82
Actual value (%): C: 87.70 H: 5.59 N: 6.71

Example 24
Method for Producing Compound (24) The synthesis scheme follows Formula 32.

Equation 32

Synthesis method of compound (24) Under a nitrogen stream, in a four-necked flask, 7.8 g of intermediate (LXVII), 5.4 g of intermediate (VI), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. 4.6 g (yield 42%) of (LXVIII) (= compound (24)) was obtained as a crude product. The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Parkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found that it was compound (24). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
As C ₅₀ H ₃₉ N ₃ Calculated value (%): C: 88.07 H: 5.77 N: 6.16
Actual value (%): C: 88.20 H: 5.58 N: 6.22

Reference Example 25
Production method for compound (25) The synthesis scheme follows Formula 33.

Equation 33

Synthesis method of compound (25) In a 4-necked flask under nitrogen flow, 7.2 g of intermediate (LXIX), 6.2 g of intermediate (LXX), 0.35 g of palladium acetate, 1.34 g of tri-tert-butylphosphine Sodium-tert-butoxide 2.0 g was placed in a 200 ml four-necked flask, 50 ml of dehydrated xylene was added, and the mixture was heated to reflux for 1.5 hours. The reaction solution was poured into 500 ml of methanol, and the precipitated solid was collected by filtration and dried in a hot vacuum. As a crude product, (LXXI) (= compound (25)) was obtained in 3.5 g (yield 31%). The resulting crude product was purified by silica gel column chromatography, and further sublimation purified. By elemental analysis (manufactured by Perkin Elmer, 2400II CHNO / O type), ¹ H-NMR, ¹³ C-NMR (manufactured by JEOL Ltd., GSX-270W) of this compound, it was found that it was compound (25). confirmed. The results of elemental analysis of the product are shown below.

Elemental analysis results
Calculated as C ₅₂ H ₃₇ N ₃ (%): C: 88.36 H: 5.30 N: 5.97
Actual value (%): C: 88.55 H: 5.28 N: 6.17

Example 29
Compound (29) was synthesized by the same synthesis method as in Reference Example 25. Table 8 shows the results of elemental analysis of the product.

Table 8

In the following examples, all mixing ratios are weight ratios unless otherwise specified. Vapor deposition (vacuum deposition) was performed in a vacuum of 10 ⁻⁶ Torr and under conditions without temperature control such as substrate heating and cooling. In the evaluation of the light emission characteristics of the element, the characteristics of an organic EL element having an electrode area of 2 mm × 2 mm were measured.

Example 31
Compound (1) was vacuum-deposited on the washed glass plate with an ITO electrode to obtain a hole injection layer having a thickness of 60 nm. Next, N, N′-bis (4′-diphenylamino-4-biphenylyl) -N, N′-diphenylbenzidine was vacuum deposited to obtain a 20 nm hole transport layer. Furthermore, a tris (8-hydroxyquinoline) aluminum complex is vacuum-deposited to form an electron-injection type light-emitting layer having a thickness of 60 nm, and then an electrode is formed by first depositing 1 nm of lithium fluoride and then 200 nm of aluminum. Thus, an organic EL element was obtained.

Examples 32-49, 53, 54, 59
Organic EL similar to Example 31 except that the hole injection layer was replaced with the compounds (2) to (19), (23), (24) and (29) in Table 1 instead of the compound (1). A device was created. The elements of Examples 31 to 49 , 53, 54 , and 59 were continuously lit at a current density of 10 mA / cm ² for a certain time in an environment of room temperature and 100 ° C., and the luminance was measured. The results are shown in Table 9.

Table 9

Example 61
Copper phthalocyanine was vapor-deposited on a glass plate with an ITO electrode to form a hole injection layer having a thickness of 25 nm. Next, the compound 19 of Table 1 and the compound (A) were co-evaporated at a composition ratio of 100: 8 to form a light emitting layer having a thickness of 45 nm. Further, (B) was vapor-deposited to form an electron injection layer having a thickness of 20 nm. A cathode was formed thereon by vapor deposition of 1 nm of lithium oxide (Li ₂ O) and 100 nm of aluminum (Al) to obtain an organic electroluminescence device. This device showed an external g quantum efficiency of 6.5% at a DC voltage of 10V. Further, the half-life when driven at a constant current at an emission luminance of 150 (cd / m ² ) was 5000 hours or more.

Example 62-67
An organic EL device was prepared in the same manner as in Example 61 except that the light emitting layer was replaced with the compound shown in Table 10 instead of the compound 19. The devices of Examples 62 to 67 were allowed to emit light continuously for a certain time at a current density of 10 mA / cm ^{2 in} an environment of room temperature and 100 ° C., and luminance was measured. The results are shown in Table 10.

Table 10

Example 69
A compound (C) is vapor-deposited on a glass plate with an ITO electrode to form a 60 nm-thick hole injection layer, and then the compound (13) in Table 1 is vapor-deposited to form a 20-nm-thick hole transport layer. did. Next, Alq3 was vapor-deposited to form an electron-injecting light-emitting layer having a thickness of 60 nm, and an electrode was formed thereon by vacuum vapor deposition of 1 nm of lithium fluoride and 200 nm of aluminum to obtain an organic electroluminescence device. . The light emission efficiency of this device at a DC voltage of 5 V was 1.6 (lm / W). In addition, the half-life when driven at a constant current at room temperature with an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Examples 70-72
An organic EL device was produced in the same manner as in Example 69 except that the compound shown in Table 11 was used instead of the compound (13) in the hole transport layer. The devices of Examples 64-67 were allowed to emit light continuously at a current density of 10 mA / cm ² for a certain time in an environment of room temperature and 100 ° C., and the luminance was measured. The results are shown in Table 11.

Table 11

Example 73
N, N′-bis (4′-diphenylamino-4-biphenylyl) -N, N′-diphenylbenzidine was vacuum deposited on a glass plate with an ITO electrode to obtain a hole injection layer having a thickness of 40 nm. Next, the compound (1) and the compound (D) were co-evaporated at a ratio of 98: 3 to prepare a light emitting layer having a thickness of 40 nm, and then Alq3 was vacuum evaporated to prepare an electron injection layer having a thickness of 30 nm. . An electrode was formed thereon by vacuum-depositing lithium fluoride at 0.7 nm and then aluminum at 200 nm to obtain an organic phosphorescent device. This device emitted light having a light emission luminance of 350 (cd / m ² ) and a maximum light emission luminance of 76600 (cd / m ² ) at a DC voltage of 5V. Further, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 4000 hours.

Example 74
An organic EL device was produced in the same manner as in Example 73 except that the compound shown in Table 12 was used instead of the compound (1) in the light emitting layer. The devices of Examples 73 and 74 were allowed to emit light continuously at a current density of 10 mA / cm ² for a certain period of time at room temperature and 100 ° C., and the luminance was measured. The results are shown in Table 12.

Table 12

Example 76
PEDOT / PSS (poly (3,4-ethylenedioxy) -2,5-thiophene / polystyrene sulfonic acid) was formed into a film thickness of 60 nm on a glass plate with an ITO electrode by a spin coating method. Further, the compound (3) and the compound (A) shown in Table 1 were dissolved in a toluene solvent at a composition ratio of 100: 8 and applied by a spin coating method to prepare a light emitting layer having a thickness of 50 nm. (B) was further vapor-deposited on the coated substrate by a vacuum vapor deposition method to form an electron injection layer having a thickness of 20 nm. A cathode was formed thereon by vapor deposition of 1 nm of lithium oxide (Li ₂ O) and 100 nm of aluminum (Al) to obtain an organic electroluminescence device. This device showed an external quantum efficiency of 5.3% at a DC voltage of 10V. Further, the half-life when driven at a constant current at an emission luminance of 100 (cd / m ² ) was 5000 hours or more.

Example 77 to 81 and 84
Compounds in Table 1 in place of Compound (3) (6), compound (8), the compound (9), Compound (10), except for using Compound (18), of compound (24), Example An element was prepared in the same manner as in 76. When these devices were driven at a constant current at room temperature with an emission luminance of 100 (cd / m ² ), all the half lives were 5000 hours or more.

Example 87
On the glass plate with an ITO electrode, HIM9 in Table 2 was vapor-deposited to form a hole injection layer having a thickness of 50 nm, and then the compound (1) was vapor-deposited to 20 nm to form a hole transport layer. Further, Alq3 was deposited to form a light emitting layer with a thickness of 20 nm. Further, the compound EX3 in Table 4 was deposited to form an electron injection layer having a thickness of 30 nm. A cathode was formed thereon by vapor deposition of 1 nm of lithium oxide and 100 nm of aluminum to obtain an organic EL device. This device showed an emission luminance of 720 (cd / m ² ) at a DC voltage of 5.0V. In addition, the half-life when the device was driven at a constant current at an emission luminance of 500 (cd / m ² ) at room temperature was 5000 hours or more immediately after the device was created and after storage for 1 hour in an oven at 150 ° C. .

Examples 88-102
A device was fabricated under the same conditions as in Example 87, using Compound EX1, Compound EX2, and Compound EX4 to Compound EX16 in Table 4 as an electron injection layer instead of Compound EX3. The characteristics of the element were measured for the element immediately after the element preparation and after storage for 1 hour in an oven at 150 ° C. As a result, the device characteristics when all devices are driven at a current density of 10 (mA / cm ² ) are voltage 4.0 (V) or less, luminance is 500 (cd / m ² ) or more, and light emission The half-life when driven at a constant current at room temperature with a luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 103-110
Instead of compound (1), compound (8), compound (9), compound (10), compound (11), compound (13), compound (14), compound (15) and compound (16) in Table 1 are used. ) Was used under the same conditions as in Example 87 except that the above was used. The characteristics of the element were measured for the element immediately after the element preparation and after storage for 1 hour in an oven at 150 ° C. As a result, the device characteristics when all devices are driven at a current density of 10 (mA / cm ² ) are voltage 4.0 (V) or less, luminance is 500 (cd / m ² ) or more, and light emission The half-life when driven at a constant current at room temperature with a luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 115
On the glass plate with an ITO electrode, the compound HIM10 in Table 2 was deposited to form a hole injection layer having a thickness of 55 nm, and then the compound (9) was deposited to 20 nm to form a hole transport layer. Further, Alq3 was deposited to form a light emitting layer with a thickness of 20 nm. Furthermore, the compound ET3 in Table 4 was deposited to form an electron injection layer having a thickness of 30 nm. A cathode was formed thereon by vapor deposition of 1 nm of lithium oxide and 100 nm of aluminum to obtain an organic EL device. This device had a light emission luminance of 680 (cd / m ² ) at a DC voltage of 5V. In addition, the half life when the element was driven at a constant current at room temperature with an emission luminance of 500 (cd / m ² ) was 5000 hours for all the elements immediately after the element preparation and after storage for 1 hour in an oven at 150 ° C. That was all.

Example 116 to Example 128
A device was prepared under the same conditions as in Example 115, using Compound ET2, Compound ET4, Compound ET6, Compound ET9, Compound ET10, Compound ET12 to Compound ET14, and Compound ET16 to Compound ET20 as the electron injection layer instead of Compound ET3. did. The characteristics of the element were measured for the element immediately after the element preparation and after storage for 1 hour in an oven at 150 ° C. As a result, the device characteristics when all devices are driven at a current density of 10 (mA / cm ² ) are voltage 4.0 (V) or less, luminance is 500 (cd / m ² ) or more, and light emission The half-life when driven at a constant current at room temperature with a luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 130
Compound (11) was dissolved in 1,2-dichloroethane on a glass plate with an ITO electrode, and a 50 nm-thick hole injection layer was formed by spin coating. Next, Alq3 was deposited to prepare an electron injecting light emitting layer having a thickness of 30 nm, and an electrode having a thickness of 100 nm was formed thereon by using an alloy in which magnesium and silver were mixed at a ratio of 10: 1. . The light emission efficiency of this device at a DC voltage of 8.0 V was 3.0 (lm / W). In addition, the half-life when driven at a constant current at room temperature with an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 131
A compound (12) was vapor-deposited on a glass plate with an ITO electrode to form a hole injection layer having a thickness of 35 nm. Next, the following compound (F) and Alq3 were co-evaporated at a composition ratio of 1:50 to form a light-emitting layer having a thickness of 40 nm. Further, Alq3 was deposited to form an electron injection layer with a thickness of 30 nm. On top of that, an electrode was formed by vacuum deposition of 1 nm of lithium fluoride (LiF) and 200 nm of aluminum (Al) to obtain an element. This device showed a luminous efficiency of 0.70 (lm / W) at a DC voltage of 5.0V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 132
On the glass plate with an ITO electrode, the compound (13) and the compound (14) were co-evaporated at a composition ratio of 1: 1 to form a hole injection layer having a film thickness of 60 nm. Next, the compound (G) shown below was vapor-deposited to form a light-emitting layer having a thickness of 20 nm. Further, Alq3 was deposited to form an electron injection layer having a thickness of 20 nm. On top of that, an electrode was formed by vacuum deposition of 1 nm of lithium fluoride (LiF) and 200 nm of aluminum (Al) to obtain an element. This device showed a light emission efficiency of 3.0 (lm / W) at a DC voltage of 5.0V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 133
A compound (7) was vapor-deposited on a glass plate with an ITO electrode to form a hole injection layer having a thickness of 60 nm. Next, the compound (H) shown below and the compound (I) shown below were co-evaporated at a composition ratio of 20: 1 to form a light emitting layer having a thickness of 20 nm. Further, Alq3 was deposited to form an electron injection layer having a thickness of 20 nm. On top of that, an electrode was formed by vacuum deposition of 1 nm of lithium fluoride (LiF) and 200 nm of aluminum (Al) to obtain an element. This device showed a luminous efficiency of 6.0 (lm / W) at a DC voltage of 5.0 V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 134
A compound (13) was vapor-deposited on a glass plate with an ITO electrode to form a 45-nm-thick hole injection layer. Next, the compound (J) shown below and the compound (K) shown below were co-evaporated at a composition ratio of 20: 1 to form a light emitting layer having a thickness of 40 nm. Further, Alq3 was deposited to form an electron injection layer with a thickness of 30 nm. On top of that, an electrode was formed by vacuum deposition of 1 nm of lithium fluoride (LiF) and 200 nm of aluminum (Al) to obtain an element. This device had a luminous efficiency of 3.5 (lm / W) at a DC voltage of 4.0 V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 135
On the glass plate with an ITO electrode, the compound (6) of the present invention was deposited to form a hole injection layer having a thickness of 70 nm. Next, a compound (L) shown below and Alq3 were co-evaporated at a composition ratio of 1: 1 to form an electron transporting light emitting layer having a film thickness of 45 nm. Furthermore, an electrode having a film thickness of 200 nm was formed from an alloy in which magnesium and silver were mixed at a ratio of 1: 3 to obtain an element. The light emission efficiency of this device at a DC voltage of 7.0 was 2.0 (lm / W). In addition, the half-life when driven at a constant current at room temperature with an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 136
Compound (12) was deposited on a glass plate with an ITO electrode to form a hole injection layer having a thickness of 50 nm. Next, the light emitting layer with a film thickness of 25 nm was formed by co-evaporating the compound (J) and the compound (M) shown below at a composition ratio of 100: 1. Further, BCP was deposited to form an electron injection layer having a thickness of 25 nm. On top of this, 0.5 nm of lithium (Li) and 150 nm of silver were further evaporated to obtain a device. This device had a light emission efficiency of 1.5 (lm / W) at a DC voltage of 8.0 V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 137
A compound (15) of the present invention was vapor-deposited on a glass plate with an ITO electrode to form a hole injection layer having a thickness of 40 nm. Next, 10 nm of the following compound (N) was deposited to form a hole transport layer. Further, the compound (O) shown below and the compound (P) shown below were co-evaporated at a composition ratio of 1: 9 to form a light emitting layer having a thickness of 25 nm. Further, BCP was deposited to form a 15 nm hole blocking layer. Further, Alq3 was deposited to form an electron injection layer having a thickness of 25 nm. On top of that, a cathode was formed by vapor deposition of 1 nm of lithium fluoride (LiF) and 100 nm of aluminum (Al) to obtain an element. This device showed an external quantum efficiency of 8.0% at a DC voltage of 8V. Further, the half-life when driven at a constant current at an emission luminance of 200 (cd / m ² ) was 5000 hours or more.

Example 138
On the glass plate with an ITO electrode, the compound (10) of the present invention was deposited by 60 nm to form a hole injection layer. Further, Alq3 was deposited to form a light emitting layer with a thickness of 20 nm. The following compound (Q) was deposited to form an electron injection layer having a thickness of 30 nm. A cathode was formed thereon by vapor deposition of 1 nm of lithium oxide (Li ₂ O) and 100 nm of aluminum (Al) to obtain a device. This device showed a luminous efficiency of 3.3 (lm / W) at a DC voltage of 4.0 V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Examples 139-145
The experiment was performed under the same conditions as in Example 132 except that ES11, EP2-5, EP10, and EP22 were used instead of the compound (Q) as the electron injection layer. The characteristics of the device were measured in the same manner as in Example 138 for the device immediately after device preparation and after storage for 1 hour in an oven at 150 ° C. As a result, the device characteristics when all devices are driven at a current density of 10 (mA / cm ² ) are voltage 4.0 (V) or less, luminance is 500 (cd / m ² ) or more, and light emission The half-life when driven at a constant current at room temperature with a luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 146
On the glass plate with an ITO electrode, the compound (2) of this invention was vapor-deposited and the 35-nm-thick hole injection layer was formed. Furthermore, HTM9 was vapor-deposited to form a 20 nm thick hole transport layer. Next, the compound (R) shown below and the compound (S) shown below were co-evaporated at a composition ratio of 50: 1 to form a light emitting layer having a thickness of 35 nm. Furthermore, the following compound (T) was vapor-deposited to form an electron injection layer having a thickness of 30 nm. On top of that, an electrode was formed by vacuum deposition of 1 nm of lithium fluoride (LiF) and 200 nm of aluminum (Al) to obtain an element. This device showed a luminous efficiency of 5.0 (lm / W) at a DC voltage of 3.5V. In addition, the half-life when driven at a constant current at an emission luminance of 500 (cd / m ² ) was 5000 hours or more.

Example 147-151
A device was produced under the same conditions as in Example 146 except that Compound (4), Compound (8), Compound (12), Compound (15), and Compound (19 ) were used instead of Compound (2). As a result, the device characteristics when all devices are driven at a current density of 10 (mA / cm ² ) are voltage 4.0 (V) or less, luminance is 500 (cd / m ² ) or more, and light emission The half-life when driven at a constant current at room temperature with a luminance of 500 (cd / m ² ) was 5000 hours or more.

Comparative Example 1
An organic EL device was prepared in the same manner as in Example 31 except that the following compound (U) was used instead of the compound (1) for the hole injection layer.

Comparative Example 2
An organic EL device was produced in the same manner as in Example 31, except that the following compound (V) was used instead of the compound (1) for the hole injection layer.

The devices of Comparative Examples 1 and ² were allowed to emit light continuously for a certain time at a current density of 10 mA / cm ^{2 in} an environment of room temperature and 100 ° C., and luminance was measured. The results are shown in Table 13.

Table 13

  As is clear from Tables 8 and 13, the compounds of the present invention all have a lower initial voltage, longer lifetime and higher luminance than the devices prepared using the compounds (U) and (V) shown in the comparative examples. It became clear that was obtained.

  As described above, by using the carbazole-containing amine compound shown in the present invention, a high performance EL device can be produced. In addition, it is clear that the performance is remarkably improved with respect to the comparative compound in which the ring-ring group on the nitrogen atom is an alkyl group, and it is possible to achieve low driving voltage and long life of the organic EL element.

FIG. 1 is a ¹ H-NMR spectrum of compound (1). (In THF-d ₈ )

FIG. 2 is a ¹ H-NMR spectrum of the compound (2). (In THF-d ₈ )

FIG. 3 is a ¹ H-NMR spectrum of compound (7). (In THF-d ₈ )

Claims (5)

A carbazole-containing amine compound represented by the following general formula [1].
General formula [1]

(In the formula, Ar ¹ represents a carbazolyl group represented by the following general formula [2],
Ar ^{2 to} Ar ⁴ are each independently a monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent or a monovalent aromatic group having 2 to 18 carbon atoms which may have a substituent. A heterocyclic group of (except for the case of the following general formula [2]),
A represents a biphenylene group represented by the following general formula [3] . )
General formula [2]

(In the formula, Ar ⁵ represents a group represented by the following general formula [5] ,
R ^{1 to} R ⁷ are each independently a hydrogen atom, a halogen atom, a monovalent aliphatic hydrocarbon group that may have a substituent, or a monovalent aromatic hydrocarbon group that may have a substituent. A monovalent aliphatic heterocyclic group which may have a substituent, a monovalent aromatic heterocyclic group which may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, -Represents a ruthio group, a substituted amino group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group . )
General formula [3]

(In the formula, one of R ^{20 to} R ²⁴ and one of R ^{25 to} R ²⁹ represent a bond, and the rest each independently have a hydrogen atom, a halogen atom, or a substituent. A monovalent aliphatic hydrocarbon group, a monovalent aromatic hydrocarbon group that may have a substituent, a monovalent aliphatic heterocyclic group that may have a substituent, and a substituent. A monovalent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, substituted amino group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, (It represents an alkylsulfonyl group or an arylsulfonyl group, and adjacent groups may form a ring with each other.)
General formula [5]

(Wherein R ³⁸ is
A hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 3 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, or a monovalent heterocyclic group having 2 to 5 carbon atoms is represented. Here, the monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms and the monovalent heterocyclic group having 2 to 5 carbon atoms are a halogen atom, a monovalent aliphatic hydrocarbon group, and a monovalent aromatic group. Aromatic hydrocarbon group, monovalent aliphatic heterocyclic group, monovalent aromatic heterocyclic group, cyano group, alkoxy group, aryloxy group, alkylthio group, arylthio group, acyl group, alkoxycarbonyl group, ant -It may be substituted with an alkylsulfonyl group, an alkylsulfonyl group, or an arylsulfonyl group. ) Le-containing amine compound - A is, carbazole according to claim 1, characterized by being represented by the following general formula [4].
General formula [4]

Wherein R ^{30 to} R ³⁷ are a hydrogen atom, a halogen atom, a monovalent aliphatic hydrocarbon group which may have a substituent, or a monovalent aromatic hydrocarbon group which may have a substituent. A monovalent aliphatic heterocyclic group which may have a substituent, a monovalent aromatic heterocyclic group which may have a substituent, a cyano group, an alkoxy group, an aryloxy group, an alkylthio group, -Represents a ruthio group, a substituted amino group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group ,
R ³⁰ and R ³¹ , R ³² and R ³³ , R ³⁴ and R ³⁵ , or R ³⁶ and R ³⁷ may combine with each other to form a ring. ) Claim 1 or 2, wherein carbazole - A material for an organic electroluminescence device comprising a Le-containing amine compound. In the organic electroluminescent element formed by forming a light emitting layer or a plurality of organic layers including a light emitting layer between a pair of electrodes, at least one of the organic layers contains the material for an organic electroluminescent element according to claim 3. An organic electroluminescence device. The organic electroluminescence device having a hole injection layer and / or a hole transport layer, wherein the hole injection layer and / or the hole transport layer comprises the organic electroluminescence device material according to claim 3. Luminescence element.

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