Nippon Steel & Sumikin Chemical Co., Ltd.

Nippon Steel Chemical & Material Co., Ltd.

Nippon Steel Chemical Co., Ltd.

Pioneer Corporation

Tohoku Pioneer Corporation

Universal Display Corporation

Kyushu University

Takahiro Kai

Masaki Komori

Chuanjun Xia

Raymond Kwong

Vadim Adamovich

Michael Stuart Weaver

Toshihiro Yamamoto

Masashi Tada

Junya Ogawa

Megumi Matsumoto

Tokiko Ueda

Yasuhiro Takahashi

Hiroshi Miyazaki

Taishi Tsuji

Katsuhide Noguchi

Toshinao Yuki

Masanori Hotta

Yusuke Nakajima

Kazuaki Yoshimura

Tohru Asari

Mitsuru Suda

Yuichi Sawada

Yuhki Terao

Mitsuru Sakai

Rumi Sannomiya

Hideki Tanaka

Bert Alleyne

Chihaya Adachi

Michael Stewart Weaver

Ayataka Endo

Kazuto Shiraishi

Atsushi Kawada

Takayuki Fukumatsu

Takaya Ishiyama

Yuji Ikenaga

Yasuhisa Tsutsumi

Tomoaki Hoshi

Jiro Asaka

Hirokatsu Sekiya

Shigetaka Ishikawa

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.

Organic electroluminescent element

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. 

Material for organic electroluminescent element and organic electroluminescent element in which same is used

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.

Material for organic electroluminescent element and organic electroluminescent element using the same

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.

Organic-electroluminescent-element material and organic electroluminescent element using same

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 CBHare 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.

Organic-electroluminescent-element material, and organic electroluminescent element using same

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.

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.

Material for organic electroluminescent elements, and organic electroluminescent element using same

Provided is a practically useful organic EL element having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic EL element has a light-emitting layer and any other organic layer between an anode and a cathode opposite to each other. The light-emitting layer contains at least two host materials and at least one light-emitting dopant. At least one of the host materials is a host material selected from compounds each having one or two indolocarbazole skeletons, and at least one of the other host materials is a host material selected from carbazole compounds each substituted with a dibenzofuran or a dibenzothiophene.

Organic electroluminescent device

Provided is a practically useful organic electroluminescent device (organic EL device) having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic electroluminescent device includes a light-emitting layer between an anode and a cathode opposite to each other. The light-emitting layer contains two host materials and at least one light-emitting dopant. One of the two host materials is a host material selected from an indolocarbazole compound having one indolocarbazole ring and an indolocarbazole compound having two indolocarbazole rings, and the other thereof is a host material selected from carbazole compounds.

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.

Organic-electroluminescent-element material and organic electroluminescent elements using same

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.

Provided is an organic electroluminescent device (EL device) using an indolocarbazole compound. The organic EL device is obtained by laminating an anode, a plurality of organic layers including a phosphorescent light-emitting layer, and a cathode on a substrate, and the phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, a hole-blocking layer, or an electron-blocking layer contains an indolocarbazole compound represented by the general formula (1). In the general formula (1), a ring I and a ring II represent rings represented by the formula (1a) and the formula (1b) to be fused to adjacent rings, As each represent C&#x2014;R or N and at least one of As represents N, Ls each represent a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted aromatic heterocyclic group, and at least one of Ls represents a two- to four-ring fused heterocyclic group, Rs each represent an aliphatic hydrocarbon group, an aromatic hydrocarbon group, or an aromatic heterocyclic group, ps each represent an integer of from 0 to 4, q represents an integer of from 0 to 2, r represents an integer of from 1 to 4, Xto Xeach represent an aromatic hydrocarbon group or an aromatic heterocyclic group, and l, m, and n each represent an integer of from 0 to 5.

Provided are an organic electroluminescent device (organic EL device) that is improved in luminous efficacy, sufficiently secures driving stability, and has a simple construction, and a material for organic EL devices to be used in the organic EL device. The material for organic EL devices is a material for organic EL devices formed of an ortho-carborane compound having a structure in which a silyl group (&#x2014;SiR) is bonded to a divalent ortho-carborane group represented by CBHthrough an aromatic group. In addition, the organic electroluminescent device is an organic electroluminescent device having a structure in which an anode, an organic layer, and a cathode are laminated on a substrate, the device having an organic layer containing the ortho-carborane compound, and the organic layer being a light-emitting layer, an electron-transporting layer, a hole-blocking layer, or an exciton-blocking layer.

Provided is an organic electroluminescent device (organic EL device) with improved luminous efficiency, sufficiently ensured driving stability, and a simple construction. The organic electroluminescent device includes an anode, an organic layer, and a cathode laminated on a substrate, in which at least one organic layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, an electron-transporting layer, an electron-blocking layer, and a hole-blocking layer contains a carborane compound that has at least one carborane ring with a silyl group on the carbon thereof.

Organic electroluminescent element material and organic electroluminescent element using same

Provided are an organic EL device which is practically satisfactory in terms of a light-emitting characteristic, a driving voltage, and durability, and a compound for organic EL devices to be used in the device. The organic EL device is an organic EL device produced by laminating, on a substrate, an anode, a plurality of organic layers including a light-emitting layer, and a cathode, the organic EL device containing, in at least one organic layer selected from the light-emitting layer, a hole-transporting layer, an electron-transporting layer, a hole-blocking layer, and an electron-blocking layer, a boron compound having two indolocarbazolyl groups in a molecule thereof. The boron compound is represented by Y-L-B(A)a-L-Y or Y-L(Z)b-Y, where Y represents an indolocarbazolyl group, L represents an aromatic group, and Z represents a boron-containing group.

Growing community of inventors

Kitakyushu, Japan

Takahiro Kai