Abstract: To provide a practically useful organic EL device having a low voltage, high efficiency and lifetime characteristics. An organic EL device including a light-emitting layer between an anode and a cathode opposite to each other, in which the light-emitting layer contains a first host selected from a compound represented by the following general formula (1), a second host selected from a compound represented by the following general formula (2), and a light-emitting dopant material. In the general formula (1), a ring A is an aromatic ring represented by formula (Ia), a ring B is a heterocycle represented by formula (Ib), Tp represents a triphenylene group, L represents an aromatic hydrocarbon group having 6 to 18 carbon atoms, and X represents N or C—H. In the general formula (2), a ring C represents an aromatic ring represented by formula (2a) and a ring D represents a heterocycle represented by formula (2b).

Abstract: To provide an organic electroluminescent device (organic EL device) that is driven at a low voltage and that has high efficiency and lifetime characteristics. The organic EL device includes a light-emitting layer between an anode and a cathode opposed to each other, in which the light-emitting layer contains a first host selected from an indolocarbazole compound having a triphenylene ring-containing group with which an N-position of an indolocarbazole ring is directly or indirectly substituted, a second host selected from a biscarbazole compound having a structure in which two carbazole rings are linked at a carbon position, and a light-emitting dopant material.

Abstract: To provide a compound for an organic EL device which provides an organic EL device having a low driving voltage and also high efficiency and extended lifetime characteristics, and an organic EL device using the compound. The compound for an organic EL device is a compound having an indolocarbazole skeleton represented by the following general formula (1): wherein a ring A is a benzene ring, a ring B is represented by formula (1b), Tp represents a triphenylene group, L represents an aromatic hydrocarbon group having 6 to 18 carbon atoms, X represents N or C—H and at least one thereof represents N, and n represents an integer of 1 to 3.

Abstract: Provided is an organic EL device having high efficiency and high driving stability while being driven at a low voltage. The organic electroluminescent device includes one or more light-emitting layers between an anode and a cathode opposite to each other. At least one of the light-emitting layers contains a host material and a light-emitting dopant, and (i) a first host formed of an indolocarbazole compound having one or two indolocarbazole rings, and (ii) a second host formed of a carbazole compound having a plurality of carbazole rings and having a bond structure represented by the following general formula (3) are used as the host material.

Abstract: Provided is an organic EL device having high efficiency and high driving stability despite having a low driving voltage. The organic EL device has at least one light-emitting layer that is composed of a vapor deposition layer containing a first host selected from among indolocarbazole compounds represented by General Formula (1), a second host selected from among biscarbazole compounds represented by the following General Formula (2), and a light-emitting dopant material: wherein m and n represent the number of repetitions and are an integer of 0 to 4, and m+n?2 is satisfied; Ar2 and Ar3 represent an aromatic hydrocarbon group or a group in which two or three of the aromatic hydrocarbon groups are linked, and at least one is a fused aromatic hydrocarbon group.

Abstract: Provided is an organic EL device, which shows high luminous efficiency, low voltage, and high driving stability. The organic EL device is an organic electroluminescent device having laminated, on a substrate, an anode, organic layers, and a cathode, wherein at least one layer of the organic layers uses materials including a carborane compound having a carborane ring and a biscarbazole ring, and an indolocarbazole compound having one or two indolocarbazole rings. The carborane compound is represented by the following general formula (1) where HA represents a carborane ring-containing group.

Abstract: Provided are an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction, and a material for an organic EL device to be used in the device. The material for an organic EL device includes a carborane compound represented by the general formula (1), and the carborane compound has a structure in which a six-membered ring group containing at least two nitrogen atoms is bonded to a carborane ring. The material for an organic EL device is suitable as a host material for a light-emitting layer containing a phosphorescent light-emitting dopant and the host material, or as a material for a hole-blocking layer. In the formula, rings A's each represent a divalent carborane group represented by the formula (1a) or the formula (1b), and two or more of X's each represent N.

Abstract: Provided are a material for an organic EL device that improves the luminous efficacy of a device, sufficiently secures its driving stability, and has a simple construction, and an organic EL device using the material. The material for an organic EL device is formed of a carborane compound having a structure in which a dibenzofuranyl group is bonded to a carborane ring. In addition, the material for an organic EL device is preferably used in a light-emitting layer, an electron-transporting layer, or a hole-blocking layer of an organic electroluminescent device having the light-emitting layer between an anode and a cathode laminated on a substrate. Also disclosed is an organic electroluminescent device using the material for an organic EL device as a host material for a light-emitting layer containing a phosphorescent light-emitting dopant and the host material.

Abstract: Provided is an organic EL device that exhibits high luminous efficiency and has high stability when driven despite having low voltage. The organic electroluminescent device is obtained by laminating an anode, organic layers and a cathode on a substrate, wherein at least one of the organic layers contains (i) a compound represented by chemical formula (1) below, and (ii) a carborane compound having one or more divalent carborane groups and an aromatic group substituted for the carborane group. In the formulas, X1 and X2 represent NR1, PR2, O, S, Se, CR3R4 or SiR5R6 and Y represents a single bond or aromatic group.

Abstract: Disclosed are an organic electroluminescent device that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction, and a material to be used in the device. The material is a material for an organic electroluminescent device formed of a carborane ring compound having a structure in which two indolocarbazole groups are each bonded to a carborane ring through an aromatic group. In addition, the device is an organic electroluminescent device having organic layers between an anode and a cathode laminated on a substrate, in which at least one layer of the organic layers contains the material for an organic electroluminescent device. When the organic layer is a light-emitting layer, the layer contains a phosphorescent light-emitting dopant and contains the material for an organic electroluminescent device as a host material.

Abstract: Provided are an organic EL device having high efficiency and high driving stability, and a compound suitable for the device. Provided is a material for an organic electroluminescent device formed of a carborane compound having a structure in which: one or two boron atoms of a carborane ring C2B10H12 are substituted with an aromatic hydrocarbon group or an aromatic heterocyclic group; and the two carbon atoms of the carborane ring are each bonded to an aromatic hydrocarbon group or an aromatic heterocyclic group, or are each bonded to any other carborane ring when a plurality of carborane rings are present. Also provided is an organic electroluminescent device in which the material for an organic electroluminescent device is used in a light-emitting layer, an electron-transporting layer, or a hole-blocking layer.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction. The device is an organic electroluminescent device having organic layers including a light-emitting layer between an anode and a cathode laminated on a substrate, in which a carborane compound is incorporated into at least one layer of the organic layers, or is incorporated as a host material into a light-emitting layer containing a phosphorescent light-emitting dopant and the host material. The carborane compound has a structure in which a N-containing fused aromatic ring is bonded to a carborane ring. The N-containing fused aromatic ring is a quinoline ring or has a structure obtained by substituting 1 to 3 ring-forming carbon atoms in a quinoline ring with N atoms.

Abstract: The present invention discloses an organic electroluminescent (EL) device having improved luminous efficiency, sufficiently secured driving stability, and a simple construction. The organic EL device of the present invention includes, between an anode and a cathode laminated on a substrate, an organic layer including a material for a luminescent device, in which the material for a luminescent device includes a carborane compound. The carborane compound includes a branched carborane compound in which three or more carborane rings bonded to one another through an aromatic group are present, at least one dibenzothiophene ring is present, and the at least one dibenzothiophene ring is bonded to the carborane ring.

Abstract: Disclosed are an organic electroluminescent device that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction, and a material for an organic electroluminescent device to be used in the device. The material is a material for an organic electroluminescent device formed of a carborane compound having an indolocarbazole skeleton and one or two or more carborane groups each bonded thereto directly or through a divalent group. In addition, the device is an organic electroluminescent device having organic layers including a light-emitting layer between an anode and a cathode laminated on a substrate, in which at least one layer of the organic layers contains the material for an organic electroluminescent device. In addition, the device is an organic electroluminescent device containing, as a host material for a light-emitting layer containing a phosphorescent light-emitting dopant and the host material, the material for an organic electroluminescent device.

Abstract: Disclosed are an organic electroluminescent device (organic EL device) having improved luminous efficiency, sufficiently secured driving stability, and a simple construction, and a material for an organic EL device. The material for an organic EL device includes a carborane compound having a structure in which at least one carborane ring and at least one dibenzothiophene ring are present, and the at least one carborane ring is bonded to the at least one dibenzothiophene ring at position 1, 2, or 3. In addition, the organic EL device includes, between an anode and a cathode laminated on a substrate, at least one organic layer, in which the at least one organic layer includes the carborane compound.

Abstract: The purpose of the present invention is to provide an organic EL element which exhibits high driving stability and high luminous efficiency at a low voltage. Provided is an organic electroluminescent element in which an anode, organic layers and a cathode are laminated on a substrate, wherein a biscarbazole compound (i) represented by general formula (1) and a carborane compound (ii) having one or more carborane rings and an aromatic group bonded to the carborane ring(s) are contained in at least one of the organic layers. Here, R and R? each denote a hydrogen atom, an aromatic hydrocarbon group, a heterocyclic group, an alkyl group, or the like, m is a number between 1 and 6, and X1 to X3 are each N, C—R? or C—.

Abstract: Provided is an organic EL element which is low voltage and has practical use utility while exhibiting high light emission efficiency and drive stability. Thus, an organic electroluminescent element obtained by layering a positive electrode, an organic layer and a negative electrode on a substrate, wherein at least one layer among the organic layers contains (i) a carbazole compound represented by general formula (1), and (ii) a carborane compound having one or more divalent carborane compounds and an aromatic group substituted for a carborane compound. Herein, L1 is an aromatic hydrocarbon group, an aromatic heterocyclic group, or a linked aromatic group configured by linking 2-6 of said aromatic rings, p is an integer of 1-3, and m is an integer of 2-4.

Abstract: Provided is an organic EL device that exhibits high luminous efficiency and has high stability when driven despite having low voltage. The organic electroluminescent device is obtained by laminating an anode, organic layers and a cathode on a substrate, wherein at least one of the organic layers contains (i) a compound represented by chemical formula (1) below, and (ii) a carborane compound having one or more divalent carborane groups and an aromatic group substituted for the carborane group. In the formulas, X1 and X2 represent NR1, PR2, O, S, Se, CR3R4 or SiR5R6 and Y represents a single bond or aromatic group.

Abstract: Provided is an organic electroluminescence (organic EL) element having high luminescent efficiency and long lifetime with low driving voltage. An organic EL element including a light emitting layer between an anode and a cathode opposing each other, wherein the light emitting layer contains: a host material containing a first host and a second host; and a luminescence dopant material, the first host is a tetracyclic condensed aromatic heterocyclic compound that is represented by the following general formula (1) and contains, as heteroatoms, two N atoms or one N atom and one O or S atom, and the second host is a carbazole compound that is represented by the following general formula (2) and has, as a substituent, a tricyclic condensed aromatic heterocycle containing, as a heteroatom, one N, O or S atom.

Abstract: Provided is an organic electroluminescent device having high efficiency and high driving stability while being driven at a low voltage. The organic electroluminescent device is an organic electroluminescent device including a light-emitting layer between an anode and a cathode opposite to each other, in which: the light-emitting layer contains two kinds of host materials and a light-emitting dopant; and a first host material (H1) out of the two kinds of host materials is an indolocarbazole-based compound having one or two indolocarbazole rings, and a second host material (H2) out of the materials is a host material selected from carbazole-based compounds each represented by the general formula (3), the compounds each having a structure in which two carbazole rings are bonded through a six-membered aromatic ring.