Patents by Inventor Nobuhiko Akino
Nobuhiko Akino 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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Publication number: 20210391542Abstract: A light emitting device having excellent light emission efficiency contains a cathode, a first organic layer containing a compound having a cross-linkable group and a phosphorescent transition metal complex, a second organic layer containing a crosslinked body of the same compound as the compound having a cross-linkable group, and an anode in this order. The ratio of the compound having a cross-linkable group contained in the first organic layer is 2 to 10% by mass with respect to the total mass of the first organic layer. The compound having a cross-linkable group may be a compound having at least one cross-linkable group selected from cross-linkable groups represented by the formula (XL-1) to the formula (XL-19).Type: ApplicationFiled: December 19, 2019Publication date: December 16, 2021Inventors: Mio SHIRATORI, Nobuhiko AKINO, Daisuke FUKUSHIMA
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Patent number: 11046655Abstract: A compound represented by the formula (1) is provided: wherein A1 represents an oxygen atom, a sulfur atom, —NR5— or —PR5—; at least one A1 is —NR5— or —PR5—; R1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group or a disubstituted amino group; R2 and R3 represent an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group, a monovalent heterocyclic group, a halogen atom or a disubstituted amino group; R4 represents a hydrogen atom, —C(R6)3, —OR7, —N(R7)2 or —Si(R7)3; m represents an integer of 0 to 3; and n represents an integer of 0 to 4.Type: GrantFiled: March 21, 2017Date of Patent: June 29, 2021Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventors: Satoshi Kobayashi, Takayuki Iijima, Nobuhiko Akino, Sheena Zuberi
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Patent number: 11005044Abstract: A light emitting device is provided which contains an anode, a cathode, and two organic layers disposed between the anode and the cathode. The first organic layer contains a phosphorescent material and the second organic layer contains a crosslinked body of a crosslinkable material and a phosphorescent material. The two phosphorescent materials contain the same phosphorescent compound represented by formula (1), and the crosslinkable material is a compound represented by formula (3): In formula (1), M represents a metal atom, n1 is ?1, n2 is ?0, E1 and E2 represent a carbon atom, L1 and L2 represent an aromatic heterocyclic ring, and A1-G1-A2 represents an anionic bidentate ligand. In formula (3), mB1 to mB3 represent an integer of ?0, Ar7 may represent an aromatic hydrocarbon group, LB1 may represent a divalent group, and X? may represent a crosslinkable group.Type: GrantFiled: September 30, 2016Date of Patent: May 11, 2021Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Toshiaki Sasada, Makoto Anryu, Nobuhiko Akino, Takakazu Saito
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Patent number: 10711091Abstract: Provided is a light-emitting device including an anode, a light-emitting layer, an electron-transporting layer and a cathode. The electron-transporting layer contains at least one electron-transporting material whose LUMO level is ?3.0 eV or more and at least one dopant material selected from the group consisting of a heterocyclic compound whose SOMO level is ?2.2 to ?1.5 eV and a derivative thereof. The LUMO level of the electron-transporting material is smaller than the SOMO level of the heterocyclic compound.Type: GrantFiled: March 21, 2017Date of Patent: July 14, 2020Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, Cambridge Display Technology LimitedInventors: Takayuki Iijima, Satoshi Kobayashi, Masanobu Tanaka, Nobuhiko Akino, Sheena Zuberi
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Publication number: 20200140394Abstract: A compound represented by the formula (1) is provided: wherein A1 represents an oxygen atom, a sulfur atom, —NR5— or —PR5—; at least one A1 is —NR5— or —PR5—; R1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group or a disubstituted amino group; R2 and R3 represent an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group, a monovalent heterocyclic group, a halogen atom or a disubstituted amino group; R4 represents a hydrogen atom, —C(R6)3, —OR7, —N(R7)2 or —Si(R7)3; m represents an integer of 0 to 3; and n represents an integer of 0 to 4.Type: ApplicationFiled: March 21, 2017Publication date: May 7, 2020Applicants: Sumitomo Chemical Company, Limited, Cambridge Display Technology LimitedInventors: Satoshi KOBAYASHI, Takayuki IIJIMA, Nobuhiko AKINO, Sheena ZUBERI
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Patent number: 10529934Abstract: Provided is a metal complex which is excellent in quantum yield and full width at half maximum of a light emission spectrum. The metal complex is represented by the following formula (1): wherein M represents an iridium atom or the like, n1 represents 1 to 3, n2 represents 0 to 2, X1 to X8 represent a carbon atom or the like, R1 to R8 represent a hydrogen atom or the like, one of Xa and Xb is a single bond, and the other is a group represented by —CR11R12—CR13R14—, R11 to R14 represent an alkyl group or the like, ring A represents a heteroaromatic ring, and A1-G1-A2 represents an anionic bidentate ligand.Type: GrantFiled: September 9, 2015Date of Patent: January 7, 2020Assignee: Sumitomo Chemical Company, LimitedInventors: Takakazu Saito, Yusuke Ishii, Kazuei Ohuchi, Nobuhiko Akino, Rui Ishikawa
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Patent number: 10431760Abstract: A light emitting device excellent in luminance life includes an anode, a cathode, a first organic layer (containing at least one phosphorescent compound) disposed between the anode and cathode and a second organic layer (containing at least one phosphorescent compound and a crosslinked body) disposed between the anode and first organic layer. At least one phosphorescent compound contained in the first and second organic layers is the same phosphorescent compound and is represented by the formula (1): wherein M may be an iridium atom, n1 represents an integer of 1 or more, n2 may be 0 or more, E1 and E2 may be a carbon atom, ring L1 represents an aromatic heterocyclic ring, ring L2 may be an aromatic hydrocarbon ring, A1-G1-A2 represents an anionic bidentate ligand, and at least one of rings L1 and L2 has an aryl group, a monovalent heterocyclic group or a substituted amino group.Type: GrantFiled: May 22, 2015Date of Patent: October 1, 2019Assignee: Sumitomo Chemical Company, LimitedInventors: Makoto Anryu, Nobuhiko Akino
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Publication number: 20190185500Abstract: A metal complex represented by formula (1) is provided. In formula (1), X represents a nitrogen atom or a group represented by ?C(RX)—; R1 represents an alkyl group having 4 or more carbon atoms; R2 represents an alkyl, cycloalkyl, alkoxy, cycloalkoxy, aryl, aryloxy, monovalent heterocyclic, or substituted amino group or a halogen atom; rings A and B each independently represent an aromatic hydrocarbon ring or an aromatic heterocyclic ring; M represents a rhodium, palladium, iridium, or platinum atom; n1 represents an integer of 1 or more, n2 represents an integer of 0 or more, and n1+n2 is 2 or 3; A1-G1-A2 represents an anionic bidentate ligand; A1 and A2 each independently represent a carbon atom, an oxygen atom, or a nitrogen atom; and G1 represents a single bond or an atomic group constituting a bidentate ligand together with A1 and A2.Type: ApplicationFiled: March 30, 2017Publication date: June 20, 2019Inventors: Mayu YOSHIOKA, Taichi ABE, Toshiaki SASADA, Kohei ASADA, Nobuhiko AKINO
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Publication number: 20190048131Abstract: Provided is a light-emitting device including an anode, a light-emitting layer, an electron-transporting layer and a cathode. The electron-transporting layer contains at least one electron-transporting material whose LUMO level is ?3.0 eV or more and at least one dopant material selected from the group consisting of a heterocyclic compound whose SOMO level is ?2.2 to ?1.5 eV and a derivative thereof. The LUMO level of the electron-transporting material is smaller than the SOMO level of the heterocyclic compound.Type: ApplicationFiled: March 21, 2017Publication date: February 14, 2019Inventors: Takayuki IIJIMA, Satoshi KOBAYASHI, Masanobu TANAKA, Nobuhiko AKINO, Sheena ZUBERI
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Patent number: 10128449Abstract: A metal complex represented by the following formula (1) is provided. In formula (1), M represents an iridium atom or a platinum atom; n1 represents 1, 2 or 3. n2 represents 0, 1 or 2; E1 to E4 represent a nitrogen atom or a carbon atom; R1 to R10 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group or a halogen atom; Xa and Xb represent a direct bond, an oxygen atom, a sulfur atom, —C(?O)—, —CRXa2— or —NRXa—; A1-G1-A2 represents an anionic bidentate ligand; and G1 represents an atomic group constituting a bidentate ligand together with A1 and A2.Type: GrantFiled: December 18, 2014Date of Patent: November 13, 2018Assignee: Sumitomo Chemical Company, LimitedInventors: Takakazu Saito, Yusuke Ishii, Kazuei Ohuchi, Kohei Asada, Nobuhiko Akino
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Publication number: 20180240978Abstract: A light emitting device is provided which contains an anode, a cathode, and two organic layers disposed between the anode and the cathode. The first organic layer contains a phosphorescent material and the second organic layer contains a crosslinked body of a crosslinkable material and a phosphorescent material. The two phosphorescent materials contain the same phosphorescent compound represented by formula (1), and the crosslinkable material is a compound represented by formula (3): In formula (1), M represents a metal atom, n1 is ?1, n2 is ?0, E1 and E2 represent a carbon atom, L1 and L2 represent an aromatic heterocyclic ring, and A1-G1-A2 represents an anionic bidentate ligand. In formula (3), mB1 to mB3 represent an integer of ?0, Ar7 may represent an aromatic hydrocarbon group, LB1 may represent a divalent group, and X? may represent a crosslinkable group.Type: ApplicationFiled: September 30, 2016Publication date: August 23, 2018Applicant: Sumitomo Chemical Company, LimitedInventors: Toshiaki SASADA, Makoto ANRYU, Nobuhiko AKINO, Takakazu SAITO
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Patent number: 9976078Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm (1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.Type: GrantFiled: March 9, 2016Date of Patent: May 22, 2018Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuhiko Akino, Chizu Sekine, Satoshi Mikami, Tomoya Nakatani
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Publication number: 20170256726Abstract: Provided is a metal complex which is excellent in quantum yield and full width at half maximum of a light emission spectrum. The metal complex is represented by the following formula (1): wherein M represents an iridium atom or the like, n1 represents 1 to 3, n2 represents 0 to 2, X1 to X8 represent a carbon atom or the like, R1 to R8 represent a hydrogen atom or the like, one of Xa and Xb is a single bond, and the other is a group represented by —CR11R12—CR13R14—, R11 to R14 represent an alkyl group or the like, ring A represents a heteroaromatic ring, and A1-G1-A2 represents an anionic bidentate ligand.Type: ApplicationFiled: September 9, 2015Publication date: September 7, 2017Applicant: Sumitomo Chemical Company, LimitedInventors: Takakazu SAITO, Yusuke ISHII, Kazuei OHUCHI, Nobuhiko AKINO, Rui ISHIKAWA
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Patent number: 9735374Abstract: A metal complex exhibits blue light emission of high color purity and has a color purity of small temperature dependence, particularly in the blue region. Specifically, the metal complex is represented by Formula (1a): wherein M is a metal atom; R0 is a divalent linking group; each j independently represents 0 or 1; RP1, RP2, RP3, RP4 and RP6 each independently represents a hydrogen atom or the like; RP5 represents a halogen atom or the like; m is an integer of from 1 to 3, n is an integer of from 0 to 2, and m+n is 2 or 3; and the portion represented by Formula (2): represents a bidentate ligand; wherein Rx and Ry are an atom bonding to the metal atom M, and each independently represents a carbon atom, an oxygen atom or a nitrogen atom.Type: GrantFiled: January 10, 2013Date of Patent: August 15, 2017Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Nobuhiko Akino, Taichi Abe, Hideo Konno, Shigeru Shimada, Kazuhiko Sato
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Patent number: 9705097Abstract: A highly stable metal complex useful for the manufacture of a light-emitting device has an excellent lifetime property, particularly in a blue region, specifically a metal complex represented by Formula (1): wherein M is a metal atom; each R0 independently represents a divalent linking group; i and j each independently represent 0 or 1; RP1, RP2, RP3, RP4, RP5 and RP6 each independently represent a hydrogen atom and the like, with a proviso that at least one of RP1, RP2, RP3, RP4, RP5 and RP6 is a dendron; m is an integer of from 1 to 3, n is an integer of from 0 to 2, and m+n is 2 or 3; and the portion represented by Formula (2): represents a bidentate ligand; wherein Rx and Ry are an atom bonding to the metal atom M, and each independently represents a carbon atom and the like.Type: GrantFiled: January 10, 2013Date of Patent: July 11, 2017Assignee: Sumitomo Chemical Company, LimitedInventors: Nobuhiko Akino, Taichi Abe, Hideo Konno, Shigeru Shimada, Kazuhiko Sato
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Publication number: 20170194584Abstract: A light emitting device excellent in luminance life includes an anode, a cathode, a first organic layer (containing at least one phosphorescent compound) disposed between the anode and cathode and a second organic layer (containing at least one phosphorescent compound and a crosslinked body) disposed between the anode and first organic layer. At least one phosphorescent compound contained in the first and second organic layers is the same phosphorescent compound and is represented by the formula (1): wherein M may be an iridium atom, n1 represents an integer of 1 or more, n2 may be 0 or more, E1 and E2 may be a carbon atom, ring L1 represents an aromatic heterocyclic ring, ring L2 may be an aromatic hydrocarbon ring, A1-G1-A2 represents an anionic bidentate ligand, and at least one of rings L1 and L2 has an aryl group, a monovalent heterocyclic group or a substituted amino group.Type: ApplicationFiled: May 22, 2015Publication date: July 6, 2017Inventors: Makoto ANRYU, Nobuhiko AKINO
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Patent number: 9691983Abstract: It is an object of the present invention to provide a composition using a polymer compound, which is useful for manufacturing a blue phosphorescent light-emitting device excellent in luminous efficiency. The present invention provides a composition including: a polymer compound substantially consisting of a constitutional unit selected from a constitutional unit represented by Formula (1)-1 below, a constitutional unit represented by Formula (1)-2 below, a constitutional unit represented by Formula (2)-1 below, a constitutional unit represented by Formula (2)-2 below, and a constitutional unit derived from a phosphorescent light-emitting compound having a light-emitting spectrum peak at smaller than 480 nm and the polymer compound containing at least both of the constitutional unit represented by Formula (1)-1 and the constitutional unit represented by Formula (1)-2; and a phosphorescent light-emitting compound having a light-emitting spectrum peak at smaller than 480 nm.Type: GrantFiled: July 13, 2011Date of Patent: June 27, 2017Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Masayuki Soga, Osamu Goto, Kazuei Ohuchi, Nobuhiko Akino
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Publication number: 20160329508Abstract: A metal complex represented by the following formula (1) is provided. In formula (1), M represents an iridium atom or a platinum atom; n1 represents 1, 2 or 3. n2 represents 0, 1 or 2; E1 to E4 represent a nitrogen atom or a carbon atom; R1 to R10 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group or a halogen atom; Xa and Xb represent a direct bond, an oxygen atom, a sulfur atom, —C(?O)—, —CRXa2— or —NRXa—; A1-G1-A2 represents an anionic bidentate ligand; and G1 represents an atomic group constituting a bidentate ligand together with A1 and A2.Type: ApplicationFiled: December 18, 2014Publication date: November 10, 2016Applicant: Sumitomo Chemical Company, LimitedInventors: Takakazu SAITO, Yusuke ISHII, Kazuei OHUCHI, Kohei ASADA, Nobuhiko AKINO
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Publication number: 20160186051Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm (1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuhiko AKINO, Chizu SEKINE, Satoshi MIKAMI, Tomoya NAKATANI
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Patent number: 9315723Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm(1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.Type: GrantFiled: September 14, 2006Date of Patent: April 19, 2016Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuhiko Akino, Chizu Sekine, Satoshi Mikami, Tomoya Nakatani