Patents by Inventor Megumi Matsumoto

Megumi Matsumoto 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).

  • Patent number: 9461250
    Abstract: 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 R1 to R3 is 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.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: October 4, 2016
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Junya Ogawa, Takahiro Kai, Toshihiro Yamamoto, Megumi Matsumoto
  • Patent number: 9343685
    Abstract: 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—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.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: May 17, 2016
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Takahiro Kai, Masaki Komori, Toshihiro Yamamoto, Tohru Asari, Takaya Ishiyama, Megumi Matsumoto
  • Patent number: 9337432
    Abstract: Provided is an organic electroluminescent device (organic EL device) which exhibits improved luminous efficiency, ensures sufficient driving stability, and has a simple configuration. The organic electroluminescent element includes an anode, a plurality of organic layers, and a cathode laminated on a substrate, and contains a carbazole compound represented by the general formula (1) in at least one layer selected from the group consisting of a emitting layer, a hole-transporting layer, and an electron-blocking layer. In general formula (1), L represents an m-valent aromatic hydrocarbon group or aromatic heterocyclic group, R's each represent hydrogen, an alkyl group, or a cycloalkyl group, m represents an integer of 1 to 3, and n's each represent an integer of 1 to 4, provided that at least one n represents an integer of 2 to 4, and at least one specific structure represented by the formula (1a) is present in the formula.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: May 10, 2016
    Assignee: NIPPON STEEL & SUMKIN CHEMICAL CO., LTD.
    Inventors: Junya Ogawa, Takahiro Kai, Megumi Matsumoto
  • Patent number: 9312496
    Abstract: 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: Grant
    Filed: October 3, 2011
    Date of Patent: April 12, 2016
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Patent number: 9260433
    Abstract: 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 R1 to R3 is a hydrogen atom or a substituent, and L is a linking group composed of an aromatic group.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: February 16, 2016
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Takahiro Kai, Toshihiro Yamamoto, Masaki Komori, Megumi Matsumoto
  • Patent number: 9214637
    Abstract: Provided are a novel chalcogen-containing aromatic compound and an organic electronic device using the compound. This compound is a chalcogen-containing aromatic compound represented by the formula (1). Among the organic electronic devices each using this chalcogen-containing aromatic compound are an organic EL device, an organic TFT device, a photovoltaic device, and the like. In the formula (1): X represents oxygen, sulfur, or selenium; A represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or an amino group; and n's each independently represent an integer of 0 to 2, provided that a sum of two n's is 1 to 4.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: December 15, 2015
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Mitsuru Suda, Takahiro Kai, Megumi Matsumoto
  • Patent number: 9156843
    Abstract: 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.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: October 13, 2015
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Takahiro Kai, Masaki Komori, Toshihiro Yamamoto, Megumi Matsumoto
  • Patent number: 9133205
    Abstract: 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.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: September 15, 2015
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Takahiro Kai, Masaki Komori, Toshihiro Yamamoto, Megumi Matsumoto
  • Patent number: 9118028
    Abstract: 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: Grant
    Filed: August 22, 2011
    Date of Patent: August 25, 2015
    Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Patent number: 8986858
    Abstract: 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 comprises organic layers between an anode and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains a carbazole compound represented by the following formula (1). In the case where the light-emitting layer of the organic electroluminescent device contains a phosphorescent dopant and a host material, it is the carbazole compound that is contained as the host material.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 24, 2015
    Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Masashi Tada, Junya Ogawa, Takahiro Kai, Megumi Matsumoto, Yasuhisa Tsutsumi
  • Patent number: 8766249
    Abstract: 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: Grant
    Filed: October 3, 2011
    Date of Patent: July 1, 2014
    Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Patent number: 8766248
    Abstract: 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: Grant
    Filed: July 7, 2011
    Date of Patent: July 1, 2014
    Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Masanori Hotta, Yuichi Sawada, Atsushi Kawada, Masana Jikumaru, Megumi Matsumoto
  • Patent number: 8722208
    Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of high driving stability, and of a simple structure. The organic EL device is constituted of an anode, organic layers containing a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate and a phosphine oxide derivative represented by general formula (1) is contained in a phosphorescent light-emitting layer, an electron-transporting layer, a hole-blocking layer, or an exciton-blocking layer. In general formula (1), L1 is a direct bond or an aromatic group with a valence of 1-3 and Ar1 is an aromatic group. The two Ar1 groups linked to the same nitrogen atom may form a nitrogen heterocycle and may further form a fused ring together with the said nitrogen heterocycle.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: May 13, 2014
    Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Takahiro Kai, Hideki Tanaka, Mitsuru Suda, Toshihiro Yamamoto, Megumi Matsumoto
  • Publication number: 20130248845
    Abstract: Provided is an organic electroluminescent device (organic EL device) which exhibits improved luminous efficiency, ensures sufficient driving stability, and has a simple configuration. The organic electroluminescent element includes an anode, a plurality of organic layers, and a cathode laminated on a substrate, and contains a carbazole compound represented by the general formula (1) in at least one layer selected from the group consisting of a emitting layer, a hole-transporting layer, and an electron-blocking layer. In general formula (1), L represents an m-valent aromatic hydrocarbon group or aromatic heterocyclic group, R's each represent hydrogen, an alkyl group, or a cycloalkyl group, m represents an integer of 1 to 3, and n's each represent an integer of 1 to 4, provided that at least one n represents an integer of 2 to 4, and at least one specific structure represented by the formula (1a) is present in the formula.
    Type: Application
    Filed: November 28, 2011
    Publication date: September 26, 2013
    Inventors: Junya Ogawa, Takahiro Kai, Megumi Matsumoto
  • Publication number: 20130207097
    Abstract: 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—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.
    Type: Application
    Filed: November 21, 2011
    Publication date: August 15, 2013
    Applicant: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Takahiro Kai, Masaki Komori, Toshihiro Yamamoto, Tohru Asari, Takaya Ishiyama, Megumi Matsumoto
  • Publication number: 20130207047
    Abstract: Provided are a novel chalcogen-containing aromatic compound and an organic electronic device using the compound. This compound is a chalcogen-containing aromatic compound represented by the formula (1). Among the organic electronic devices each using this chalcogen-containing aromatic compound are an organic EL device, an organic TFT device, a photovoltaic device, and the like. In the formula (1): X represents oxygen, sulfur, or selenium; A represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or an amino group; and n's each independently represent an integer of 0 to 2, provided that a sum of two n's is 1 to 4.
    Type: Application
    Filed: October 3, 2011
    Publication date: August 15, 2013
    Applicant: Nippon Steel & Sumikin Chemical Co., Ltd.
    Inventors: Mitsuru Suda, Takahiro Kai, Megumi Matsumoto
  • Publication number: 20130200350
    Abstract: 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: Application
    Filed: August 22, 2011
    Publication date: August 8, 2013
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Publication number: 20130193429
    Abstract: 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: Application
    Filed: October 3, 2011
    Publication date: August 1, 2013
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Publication number: 20130184458
    Abstract: 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: Application
    Filed: October 3, 2011
    Publication date: July 18, 2013
    Inventors: Yuichi Sawada, Masanori Hotta, Megumi Matsumoto
  • Publication number: 20130150576
    Abstract: 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: Application
    Filed: July 7, 2011
    Publication date: June 13, 2013
    Inventors: Masanori Hotta, Yuichi Sawada, Atsushi Kawada, Masana Jikumaru, Megumi Matsumoto