Nippon Steel & Sumikin Chemical Co., Ltd.

Nippon Steel Chemical Co., Ltd.

Fuji Electric Systems Co. Ltd.

Pioneer Corporation

Tohoku Pioneer Corporation

Nippon Steel Chemical & Material Co., Ltd.

Universal Display Corporation

Tohoku University

Toshihiro Yamamoto

Takahiro Kai

Masaki Komori

Megumi Matsumoto

Junya Ogawa

Hiroshi Miyazaki

Hironobu Yao

Yasuhiro Takahashi

Masashi Tada

Taishi Tsuji

Katsuhide Noguchi

Noritomo Hirayama

Masanori Hotta

Yoshinori Ohmuro

Toshinao Yuki

Chuanjun Xia

Raymond Kwong

Vadim Adamovich

Michael Stuart Weaver

Masami Kishiro

Kazuaki Yoshimura

Tokiko Ueda

Yusuke Nakajima

Yuichi Sawada

Mitsuru Suda

Rumi Sannomiya

Bert Alleyne

Michael Stewart Weaver

Yu Yamada

Tohru Asari

Takaya Ishiyama

Takayuki Fukumatsu

Hiroto Hara

Hideki Tanaka

Ikumi Ichihashi

Michiaki Unno

Kazuto Shiraishi

Osamu Yoshitake

Daisuke Suzaki

Sadao Kamimura

Takuya Onodera

Kouji Hagiwara

Jiro Asaka

Tomoaki Hoshi

Naoya Masutomi

Yasuhiro Shindo

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

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

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.

Organic electroluminescent element

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.

Boron compound for organic electroluminescent elements, and organic electroluminescent element

Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate wherein the light-emitting layer contains a phosphorescent dopant and a 1,9-substituted carbazole compound as a host material. An example of the 1,9-substituted carbazole compound is represented by the following general formula (1). In formula (1), Ar is an aromatic hydrocarbon group or aromatic heterocyclic group; L is an aromatic hydrocarbon group or aromatic heterocyclic group; each of Rto Ris a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; n is an integer of 1 to 3.

Organic electroluminescent device

Provided is an organic electroluminescent device (EL device) that uses an indolocarbazole compound. The organic EL device includes an anode, a plurality of organic layers including a phosphorescent light-emitting layer, and a cathode laminated on a substrate, in which at least one organic layer selected from the phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-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), respectively, each of which are fused to an adjacent ring. X's each represent nitrogen or C&#x2014;Y and at least one of X's represents nitrogen. Y's each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group. A represents an alkyl group, a cycloalkyl group, or an aromatic group. At least one of Y and A represents an alkyl group or a cycloalkyl group. R's each represent hydrogen, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group.

Provided is an organic electroluminescent device (organic EL device), which has improved luminous efficiency, shows sufficiently ensured driving stability, and has a simple construction. The organic electroluminescent device includes an anode, a cathode, and organic layers including a hole-transporting layer and a light-emitting layer, the organic layers being interposed between the anode and the cathode, in which the light-emitting layer contains a phosphorescent light-emitting material and the hole-transporting layer and the light-emitting layer have an electron- and/or exciton-blocking layer therebetween, the electron- and/or exciton-blocking layer being adjacent to the light-emitting layer and containing an indolocarbazole compound represented by the general formula (2). In the formula, a ring B represents a heterocycle represented by the formula (1c) to be fused with adjacent rings, Z represents an n-valent aromatic hydrocarbon group or an aromatic heterocyclic group, and n represents 1 or 2.

Organic electroluminescent device having an electron- and /or exciton-blocking layer comprising an indolocarbazole compound

Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secure of driving stability, and of a simple configuration. The organic EL device comprises organic layers comprising a hole-transporting layer and a light-emitting layer sandwiched between an anode and a cathode. The light-emitting layer contains a fluorescent light-emitting material and an electron- and/or exciton-blocking layer containing an indolocarbazole derivative represented by general formula (2) is disposed between the hole-transporting layer and the light-emitting layer so as to be adjacent to the light-emitting layer. In general formula (2), ring B is a heterocyclic ring fused to the adjacent rings and represented by formula (1c), Z is an n-valent aromatic hydrocarbon group or aromatic heterocyclic group, and n is 1 or 2.

Organic electroluminescent device having an electron- and/or exciton-blocking layer comprising an indolocarbazole compound

Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and an unsymmetrical indolocarbazole compound as a host material. The unsymmetrical indolocarbazole compound has a structure in which two or more groups having an indolocarbazole structure are linked together by a linking group and at least one of the groups has an isomeric indolocarbazole skeleton different from those of the other groups. Examples of the unsymmetrical indolocarbazole compound include compounds represented by the following formula (2) wherein A is a substituent, each of Rto Ris a hydrogen atom or a substituent, and L is a linking group composed of an aromatic group. 

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device is constituted of an anode, organic layers comprising a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, an electron-transporting layer, and a hole-blocking layer contains an indolocarbazole compound represented by general formula (1). In the case where the indolocarbazole compound is incorporated in the light-emitting layer containing a phosphorescent dopant and a host material, it is incorporated as the host material. Some of such indolocarbazole compounds are represented by the following formula (2): wherein each of Aand Ais an aromatic hydrocarbon group; each of Band Bis an aromatic heterocyclic group; each of Rto Ris a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; m is an integer of 1 to 3; and n is an integer of 0 to 3. 

Organic electroluminescent device comprising an organic layer containing an indolocarbazole compound

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device has a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer contains a fused polycyclic compound in which seven or more rings are fused together as a host material. The aforementioned fused polycyclic compound has a structure formed by fusing two or more indole rings to a carbazole ring. A specific example thereof is the compound represented by the following formula.

A combination of host materials suitable for co-evaporation or premix evaporation, and devices containing the combination of host materials are provided. The combination of host materials provides improved lifetime and efficiency. A method for fabricating devices containing the host material combination is also provided.

Depositing premixed materials

Provided is an organic electroluminescent device (organic EL device), which has improved luminous efficiency, has sufficient driving stability, and has a simple construction. The organic EL device of the present invention is an organic electroluminescent device, including a light-emitting layer and a hole-transporting layer between an anode and a cathode laminated on a substrate, in which the light-emitting layer contains a phosphorescent light-emitting dopant and an indolocarbazole compound that serves as a host material, or alternatively, the hole-transporting layer contains an indolocarbazole compound. The indolocarbazole compound is represented by the following formula (1). In the formula: A's each represent an aromatic hydrocarbon group or an aromatic heterocyclic group, provided that at least one of A's has a fused ring structure; and R's each represent a hydrogen atom, an alkyl group, an alkoxy group, or an acyl group. 

Material having indolocarbazole compound for phosphorescent light-emitting element and organic electroluminescent element using the same

Disclosed is a useful organic EL device which comprises a phosphorescent light-emitting layer and is endowed with improved luminous efficiency and high driving stability. Also disclosed is a hole-transporting material suitable for use in the phosphorescent light-emitting device. The hole-transporting material is a triptycene derivative which has substituents at the 9- and 10-positions and is substituted with an aromatic group containing at least one diarylamino group (&#x2014;ArNAr). The organic EL device contains the triptycene derivative in at least one organic layer selected from the group of a phosphorescent light-emitting layer, a hole-transporting layer, an electron-blocking layer, and an exciton-blocking layer. The diarylamino group (&#x2014;NAr) may be fused to form an aromatic heterocyclic group such as a carbazolyl group.

Organic electroluminescent device having triptycene derivative material

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, fully secured of driving stability, and of simple structure. The organic EL device comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the light-emitting layer comprises a phosphorescent dopant and a compound containing carbazolyl groups at both ends represented by the following formula (1) as a host material. In formula (1), X is independently CH optionally containing a substituent or N and L is a direct bond, an ethylene group, or an acetylene group.

Compound for organic electroluminescent device and organic electroluminescent device using the same

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Kitakyushu, Japan

Toshihiro Yamamoto