Abstract: An organic electroluminescent device comprises, between an anode and a cathode, a hole injection layer, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole injection layer contains an arylamine compound (?) having three or more triphenylamine skeletons, the hole-transporting layer contains an arylamine compound (?) having two triphenylamine skeletons, and the electron-transporting layer contains an electron-transporting compound having an anthracene ring skeleton and a pyridoindole ring skeleton. The organic EL device emits light highly efficiently, drives on a low voltage, and features excellent durability and long life.

Abstract: A problem of the invention is to provide an organic EL device having a high efficiency, a low driving voltage and a long life, by combining various materials for organic EL device, which are excellent in an injection or transportation performance of holes or electrons, and in stability and durability in a thin film, so as to enable the respective materials to effectively reveal their characteristics. The invention relates to an organic electroluminescent device including at least an anode electrode, a hole-injecting layer, a hole-transporting layer, an emitting layer, an electron-transporting layer and a cathode electrode in this order, in which the hole-injecting layer contains an arylamine compound having, in its molecule, a structure in which three or more triphenylamine structures are connected through a single bond or a hetero atom-free divalent group; and the hole-transporting layer contains an arylamine compound having two triphenylamine structures in its molecule.

Abstract: An organic electroluminescent device comprising, between an anode and a cathode, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole-transporting layer contains an arylamine compound (X) having a molecular structure to which three or more triphenylamine skeletons are singly bonded or bonded through a divalent hydrocarbon group and an arylamine compound (Y) having a molecular structure to which two triphenylamine skeletons are singly bonded or bonded through the divalent hydrocarbon group. The device excels in hole and electron injection/transport property, stability and durability in the form of thin films, and is highly efficient, becomes luminous on a low driving voltage, and has a long life.

Abstract: Dicarbazole derivatives represented by the following general formula (1), wherein X is an oxygen atom or a sulfur atom, Ar1 and Ar2 are aromatic hydrocarbon groups or aromatic heterocyclic groups, R1 to R12 are hydrogen atoms, deuterium atoms, fluorine atoms, chlorine atoms, cyano groups, nitro groups, alkyl groups having 1 to 6 carbon atoms, cycloalkyl groups having 5 to 10 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, alkyloxy groups having 1 to 6 carbon atoms, cycloalkyloxy groups having 5 to 10 carbon atoms, aromatic hydrocarbon groups, aromatic heterocyclic groups, aryloxy groups or disubstituted amino groups having aromatic hydrocarbon groups or aromatic heterocyclic groups as substituents bonded to the nitrogen atom.

Abstract: An organic electroluminescent (EL) device having high efficiency, low driving voltage and a long lifetime is provided by combining various materials for an organic EL device, which are excellent, as materials for an organic EL device having high efficiency and high durability, in hole and electron injection/transport performances, electron blocking ability, stability in a thin-film state and durability, so as to allow the respective materials to effectively reveal their characteristics. In the organic EL device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the second hole transport layer includes an arylamine compound represented by the following general formula (1).

Abstract: An organic electroluminescent device having high efficiency, low driving voltage and a long lifetime is provided by combining various materials for an organic electroluminescent device, which are excellent, as materials for an organic electroluminescent device having high efficiency and high durability, in hole and electron injection/transport performances, electron blocking ability, stability in a thin-film state and durability, so as to allow the respective materials to effectively reveal their characteristics. In the organic electroluminescent device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the second hole transport layer includes an arylamine compound represented by the following general formula (1).

Abstract: Pyrimidine derivatives of the present invention are represented by the following general formula (1), wherein W, X, Y and Z are carbon atoms or nitrogen atoms under the condition that only any one is a nitrogen atom to which none of the groups R6 to R9 are bonded, A and B are single bonds, divalent aromatic hydrocarbon groups or divalent aromatic heterocyclic groups, Ar1 and Ar2 are monovalent aromatic hydrocarbon groups or monovalent aromatic heterocyclic groups, and R1 to R9 are hydrogen atoms, deuterium atoms, fluorine atoms, chlorine atoms, cyano groups, alkyl groups having 1 to 6 carbon atoms, monovalent aromatic hydrocarbon groups or monovalent aromatic heterocyclic groups. The compound excels in electron injection/transporting capability, features high hole-blocking power and high stability in the form of a thin film, and can be favorably used as a material for producing highly efficient and durable organic EL devices.

Abstract: An organic EL device having high efficiency, low driving voltage and a long lifetime is provided by combining various materials for an organic EL device, which are excellent, as materials for an organic EL device having high efficiency and high durability, in hole and electron injection/transport performances, electron blocking ability, stability in a thin-film state and durability, so as to allow the respective materials to effectively reveal their characteristics. In the organic EL device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the second hole transport layer includes an arylamine compound represented by the following general formula (1).

Abstract: An organic electroluminescent device having a capping layer composed of material having a high refractive index that involves only small differences in refractive indices measured in the blue, green, and red wavelength regions, excelling in thin film stability and durability and having no absorption in the respective wavelength ranges of blue, green, and red is provided to improve device characteristics of the organic electroluminescent device, particularly to greatly improve the coupling-out efficiency.

Abstract: An organic compound with excellent characteristics excelling in hole injecting and transporting performance and having an electron-blocking ability, high stability in a thin film state and excellent heat resistance is provided as a material for an organic electroluminescent device of high efficiency and high durability, and the organic electroluminescent device of high luminous efficiency and high durability is provided using this compound. The compound of a general formula (1) having an indenoacridan ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes and one or more organic layers sandwiched between the pair of electrodes.

Abstract: Benzotriazole derivatives represented by the following general formula (1), wherein Ar1 and Ar2 are, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.

Abstract: There is provided an organic compound having excellent characteristics, including excellent electron-injecting/transporting performance, hole blocking ability, and high stability in the thin-film state, for use as material of an organic electroluminescent device having high efficiency and high durability. There is also provided a high-efficient and high-durable organic electroluminescent device using the compound. The compound is represented by general formula (1) having a substituted anthracene ring structure and a pyridoindole ring structure. The organic electroluminescent device includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes, and the compound is used as a constituent material of at least one organic layer.

Abstract: A compound having a benzotriazole ring structure and a formula (1): wherein Ar is a substituted or unsubstituted aromatic hydrocarbon group, aromatic heterocyclic group, or condensed polycyclic aromatic group; A and B are the same as or different from each other and each represent a hydrogen atom or a monovalent group of formula (2), provided that A and B are not simultaneously hydrogen atoms: wherein R1 to R8 are the same as or different and each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group having 1 to 6 carbon atoms, aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or condensed polycyclic aromatic group; m is an integer of 0, 1 or 2; X represents a carbon atom or a nitrogen atom; when X is a nitrogen atom, the nitrogen atom does not have substituents or bonding groups of R1, R2, R3 and R4; and when m is 2, a plurality of R1, R2, R3, R4 and X each are the

Abstract: An organic compound with characteristics excelling in hole-injecting/transporting performance and having an electron blocking ability, a highly stable thin-film state, and excellent heat resistance is provided as material for an organic electroluminescent device of high efficiency and high durability, and the organic electroluminescent device of high efficiency and high durability is provided using this compound. The compound of a general formula (Chemical Formula 1) having an acridan ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes and one or more organic layers sandwiched between the pair of electrodes.

Abstract: Triphenylene derivatives represented by the following general formula (1), wherein Ar1 and Ar2 are aromatic groups. The compounds have a structure in which an aromatic tertiary amine is introduced into a triphenylene ring. Owing to this structure, the compounds exhibit (A) favorable hole injection property, (B) large hole mobility, (C) excellent electron blocking power, (D) stability in their thin-film form, and (E) excellent heat resistance. The compounds are useful as hole-transporting materials for use in the organic EL devices.

Abstract: There is provided an organic compound having excellent characteristics, including excellent electron-injecting/transporting performance, hole blocking ability, and high stability in the thin-film state, for use as material of an organic electroluminescent device having high efficiency and high durability. There is also provided a high-efficient and high-durable organic electroluminescent device using the compound. The compound is represented by general formula (1) having a substituted anthracene ring structure and a pyridoindole ring structure. The organic electroluminescent device includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes, and the compound is used as a constituent material of at least one organic layer.

Abstract: Benzotriazole derivatives represented by the following general formula (1), wherein Ar1 and Ar2 are, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.

Abstract: An organic electroluminescent device having a capping layer composed of material having a high refractive index, excelling in thin film stability and durability and having no absorption in the respective wavelength ranges of blue, green, and red is provided to improve device characteristics of the organic electroluminescent device, particularly to greatly improve light extraction efficiency. The organic electroluminescent device has at least an anode electrode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode electrode, and the capping layer in this order, wherein the capping layer contains an arylamine compound (X) having a structure in which two triphenylamine structures are joined within a molecule via a single bond or a divalent group that does not contain a heteroatom.

Abstract: A problem of the invention is to provide an organic EL device having a high efficiency, a low driving voltage and a long life, by combining various materials for organic EL device, which are excellent in an injection or transportation performance of holes or electrons, and in stability and durability in a thin film, so as to enable the respective materials to effectively reveal their characteristics. The invention relates to an organic electroluminescent device including at least an anode electrode, a hole-injecting layer, a hole-transporting layer, an emitting layer, an electron-transporting layer and a cathode electrode in this order, in which the hole-injecting layer contains an arylamine compound having, in its molecule, a structure in which three or more triphenylamine structures are connected through a single bond or a hetero atom-free divalent group; and the hole-transporting layer contains an arylamine compound having two triphenylamine structures in its molecule.

Abstract: The present invention relates to a compound having a substituted anthracene ring structure and a pyridoindole ring structure, which is represented by the following general formula (1) or the following general formula (2); and an organic electroluminescent device having a pair of electrodes and at least one organic layer interposed therebetween, in which the compound having a substituted anthracene ring structure and a pyridoindole ring structure, which is represented by the following general formula (1) or the following general formula (2), is used as a constituent material of the aforementioned at least one organic layer.