Patents by Inventor Masanori Hotta
Masanori Hotta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11600786Abstract: 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.Type: GrantFiled: March 3, 2016Date of Patent: March 7, 2023Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.Inventors: Junya Ogawa, Takahiro Kai, Masanori Hotta, Yuji Ikenaga, Mitsuru Sakai, Masashi Tada, Tokiko Ueda, Katsuhide Noguchi
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Publication number: 20180254426Abstract: 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.Type: ApplicationFiled: March 14, 2016Publication date: September 6, 2018Applicant: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.Inventors: Yuji IKENAGA, Takahiro KAI, Masanori HOTTA, Junya OGAWA, Mitsuru SAKAI, Masashi TADA, Tokiko UEDA, Katsuhide NOGUCHI
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Publication number: 20180138420Abstract: Provided is an organic EL device having a low driving voltage, high luminous efficiency, and a long lifetime. The organic EL 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 a host material and a light-emitting dopant material; and the host material is a material obtained by mixing a first host selected from compounds in each of which a diphenyltriazinyl group is bonded to one nitrogen atom of an indolocarbazole ring and a phenyl group of the diphenyltriazinyl group is substituted with one or more phenyl groups, and a second host selected from compounds in each of which aromatic hydrocarbon groups are bonded to two nitrogen atoms of a biscarbazole ring and at least one of the aromatic hydrocarbon groups is a fused aromatic hydrocarbon group.Type: ApplicationFiled: May 17, 2016Publication date: May 17, 2018Inventors: Masashi Tada, Takahiro Kai, Tokiko Ueda, Junya Ogawa, Katsuhide Noguchi, Masanori Hotta
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Publication number: 20180083201Abstract: 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.Type: ApplicationFiled: March 3, 2016Publication date: March 22, 2018Inventors: Junya Ogawa, Takahiro Kai, Masanori Hotta, Yuji Ikenaga, Mitsuru Sakai, Masashi Tada, Tokiko Ueda, Katsuhide Noguchi
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Publication number: 20170263869Abstract: Provided is a homogeneous organic EL device having a low driving voltage, high luminous efficiency, and a long lifetime. The 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 a host material and a light-emitting dopant material; the host material is a material obtained by preliminarily mixing two or more kinds of compounds selected from compounds each having a structure in which two nitrogen atoms of an indolocarbazole ring are each substituted with an aromatic hydrocarbon group or an aromatic heterocyclic group; and the light-emitting layer is formed by co-depositing the preliminarily mixed host material and the light-emitting dopant material in a vacuum.Type: ApplicationFiled: August 26, 2015Publication date: September 14, 2017Inventors: Masashi Tada, Takahiro Kai, Masanori Hotta, Junya Ogawa, Mitsuru Sakai, Yuji Ikenaga, Tokiko Ueda, Katsuhide Noguchi
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Patent number: 9312496Abstract: Provided are a novel nitrogen-containing aromatic heterocyclic compound and an organic electronic device using the compound. Specifically provided is an organic electroluminescent device, including a plurality of organic layers between an anode and a cathode laminated on a substrate, in which at least one of the organic layers contains a nitrogen-containing aromatic compound represented by the following formula (1).Type: GrantFiled: October 3, 2011Date of Patent: April 12, 2016Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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Patent number: 9118028Abstract: Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The device comprises a plurality of organic layers between an anode and a cathode piled one upon another on a substrate wherein at least one of the organic layers contains a nitrogen-containing organic compound represented by the following formula (1). In formula (1), X is N-A, an oxygen atom, or a sulfur atom; A is an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group.Type: GrantFiled: August 22, 2011Date of Patent: August 25, 2015Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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Patent number: 8766249Abstract: Provided are a novel nitrogen-containing aromatic heterocyclic compound and an organic electronic device using the compound. This nitrogen-containing aromatic compound is represented by the general formula (1). Further, the present invention relates to organic electronic devices such as a light-emitting device, a thin-film transistor, and a photovoltaic device each using the nitrogen-containing aromatic compound. (L represents an m+n-valent aromatic hydrocarbon group or aromatic heterocyclic group, or a group arising from a triarylamine or a diaryl sulfone; X represents N-A, O, S, or Se; A represents an alkyl group or the like; R represent hydrogen, an alkyl group, an aromatic group, or the like; and m+n is an integer of 2 to 4.Type: GrantFiled: October 3, 2011Date of Patent: July 1, 2014Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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Nitrogen-containing aromatic compound, organic semiconductor material, and organic electronic device
Patent number: 8766248Abstract: Provided are a nitrogen-containing aromatic heterocyclic compound useful as an organic semiconductor material and an organic electronic device using this compound. The nitrogen-containing aromatic heterocyclic compound has a fused indole skeleton represented by the following formula (1), the organic semiconductor material contains the compound, and the organic electronic device uses the organic semiconductor material. In general formula (1), X is N-A?, O, S, or Se; A is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more.Type: GrantFiled: July 7, 2011Date of Patent: July 1, 2014Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.Inventors: Masanori Hotta, Yuichi Sawada, Atsushi Kawada, Masana Jikumaru, Megumi Matsumoto -
Publication number: 20130200350Abstract: Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The device comprises a plurality of organic layers between an anode and a cathode piled one upon another on a substrate wherein at least one of the organic layers contains a nitrogen-containing organic compound represented by the following formula (1). In formula (1), X is N-A, an oxygen atom, or a sulfur atom; A is an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group.Type: ApplicationFiled: August 22, 2011Publication date: August 8, 2013Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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Publication number: 20130193429Abstract: Provided are a novel nitrogen-containing aromatic heterocyclic compound and an organic electronic device using the compound. Specifically provided is an organic electroluminescent device, including a plurality of organic layers between an anode and a cathode laminated on a substrate, in which at least one of the organic layers contains a nitrogen-containing aromatic compound represented by the following formula (1).Type: ApplicationFiled: October 3, 2011Publication date: August 1, 2013Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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Publication number: 20130184458Abstract: Provided are a novel nitrogen-containing aromatic heterocyclic compound and an organic electronic device using the compound. This nitrogen-containing aromatic compound is represented by the general formula (1). Further, the present invention relates to organic electronic devices such as a light-emitting device, a thin-film transistor, and a photovoltaic device each using the nitrogen-containing aromatic compound. (L represents an m+n-valent aromatic hydrocarbon group or aromatic heterocyclic group, or a group arising from a triarylamine or a diaryl sulfone; X represents N-A, O, S, or Se; A represents an alkyl group or the like; R represent hydrogen, an alkyl group, an aromatic group, or the like; and m+n is an integer of 2 to 4.Type: ApplicationFiled: October 3, 2011Publication date: July 18, 2013Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
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NITROGEN-CONTAINING AROMATIC COMPOUND, ORGANIC SEMICONDUCTOR MATERIAL, AND ORGANIC ELECTRONIC DEVICE
Publication number: 20130150576Abstract: Provided are a nitrogen-containing aromatic heterocyclic compound useful as an organic semiconductor material and an organic electronic device using this compound. The nitrogen-containing aromatic heterocyclic compound has a fused indole skeleton represented by the following formula (1), the organic semiconductor material contains the said compound, and the organic electronic device uses the said organic semiconductor material. In general formula (1), X is N-A?, O, S, or Se; A is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more.Type: ApplicationFiled: July 7, 2011Publication date: June 13, 2013Inventors: Masanori Hotta, Yuichi Sawada, Atsushi Kawada, Masana Jikumaru, Megumi Matsumoto -
Patent number: 8227798Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and said organic layers comprise a compound represented by general formula (1). A light-emitting layer containing a phosphorescent dopant is suitable for an organic layer comprising a compound represented by general formula (1).Type: GrantFiled: March 24, 2008Date of Patent: July 24, 2012Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Takahiro Kai, Toshihiro Yamamoto, Masanori Hotta, Junya Ogawa
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Patent number: 8012606Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in structure and also disclosed is a heterocyclic compound useful for the said device. Specifically, the heterocyclic compound is represented by the following general formula (I) and the organic EL device comprises an organic layer containing the said heterocyclic compound. In general formula (I), X1 and X2 respectively denote O, S, or N—R, R denotes a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, Ar1, Ar2, Ar3, and Ar4 respectively denote a substituted or unsubstituted aryl group, Ar1, Ar2, and the nitrogen atom bonded thereto or Ar3, Ar4, and the nitrogen atom bonded thereto may form a nitrogen-containing hetero ring, and m and n respectively denote an integer of 1 or 2.Type: GrantFiled: July 27, 2006Date of Patent: September 6, 2011Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Takahiro Kai, Toshihiro Yamamoto, Masaki Komori, Masanori Hotta, Yuichi Sawada
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Patent number: 7993760Abstract: Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.Type: GrantFiled: November 22, 2006Date of Patent: August 9, 2011Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Masaki Komori, Toshihiro Yamamoto, Takahiro Kai, Masanori Hotta
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Publication number: 20100127616Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and at least one of said organic layers comprises a compound for an organic EL device represented by general formula (1). Said organic layer is preferably a light-emitting layer containing a phosphorescent dopant.Type: ApplicationFiled: March 26, 2008Publication date: May 27, 2010Applicant: NIPPON STEEL CHEMICAL CO., LTD.Inventors: Takahiro Kai, Toshihiro Yamamoto, Masanori Hotta, Junya Ogawa
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Publication number: 20100044695Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and said organic layers comprise a compound represented by general formula (1). A light-emitting layer containing a phosphorescent dopant is suitable for an organic layer comprising a compound represented by general formula (1).Type: ApplicationFiled: March 24, 2008Publication date: February 25, 2010Applicant: Nippon Steel Chemical Co., Ltd.Inventors: Takahiro Kai, Toshihiro Yamamoto, Masanori Hotta, Junya Ogawa
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Publication number: 20090302742Abstract: Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.Type: ApplicationFiled: November 22, 2006Publication date: December 10, 2009Applicant: Nippon Steel Chemical Co., Ltd.Inventors: Masaki Komori, Toshihiro Yamamoto, Takahiro Kai, Masanori Hotta
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Publication number: 20090153031Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in structure and also disclosed is a heterocyclic compound useful for the said device. Specifically, the heterocyclic compound is represented by the following general formula (I) and the organic EL device comprises an organic layer containing the said heterocyclic compound. In general formula (I), X1 and X2 respectively denote O, S, or N—R, R denotes a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, Ar1, Ar2, Ar3, and Ar4 respectively denote a substituted or unsubstituted aryl group, Ar1, Ar2, and the nitrogen atom bonded thereto or Ar3, Ar4, and the nitrogen atom bonded thereto may form a nitrogen-containing hetero ring, and m and n respectively denote an integer of 1 or 2.Type: ApplicationFiled: July 27, 2006Publication date: June 18, 2009Applicant: Nippon Steel Chemical Co., LtdInventors: Takahiro Kai, Toshihiro Yamamoto, Masaki Komori, Masanori Hotta, Yuichi Sawada