Patents by Inventor Yusuke TAKITA

Yusuke TAKITA 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).

  • Publication number: 20190363259
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. A novel organic compound is provided. A novel organic compound having a hole-transport property is provided. A novel hole-transport material is provided. A hole-transport material including an organic compound having a substituted or unsubstituted benzonaphthofuran skeleton and a substituted or unsubstituted amine skeleton is provided. A light-emitting element using the hole-transport material is provided. An organic compound in which an amine skeleton including two aromatic hydrocarbon groups having 6 to 60 carbon atoms is bonded to the 6- or 8-position of the benzonaphthofuran skeleton is provided.
    Type: Application
    Filed: August 7, 2019
    Publication date: November 28, 2019
    Inventors: Sachiko KAWAKAMI, Tsunenori SUZUKI, Yusuke TAKITA, Satoshi SEO
  • Publication number: 20190341551
    Abstract: In an organic compound, two groups each including a benzonaphthofuranylamine skeleton are bonded to a central skeleton including a fluorene skeleton. The organic compound emits favorable blue light. Furthermore, the organic compound has a high hole-transport property.
    Type: Application
    Filed: July 17, 2019
    Publication date: November 7, 2019
    Inventors: Kaori OGITA, Sachiko KAWAKAMI, Tsunenori SUZUKI, Naoaki HASHIMOTO, Yusuke TAKITA, Satoshi SEO
  • Patent number: 10439146
    Abstract: In an organic compound, two groups each including a benzonaphthofuranylamine skeleton are bonded to a central skeleton including a fluorene skeleton. The organic compound emits favorable blue light. Furthermore, the organic compound has a high hole-transport property.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: October 8, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Sachiko Kawakami, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita, Satoshi Seo
  • Patent number: 10411193
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. A novel organic compound is provided. A novel organic compound having a hole-transport property is provided. A novel hole-transport material is provided. A hole-transport material including an organic compound having a substituted or unsubstituted benzonaphthofuran skeleton and a substituted or unsubstituted amine skeleton is provided. A light-emitting element using the hole-transport material is provided. An organic compound in which an amine skeleton including two aromatic hydrocarbon groups having 6 to 60 carbon atoms is bonded to the 6- or 8-position of the benzonaphthofuran skeleton is provided.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: September 10, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Kawakami, Tsunenori Suzuki, Yusuke Takita, Satoshi Seo
  • Patent number: 10388900
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: August 20, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori Suzuki, Yusuke Takita, Naoaki Hashimoto
  • Patent number: 10270041
    Abstract: A light-emitting element including a first electrode, a second electrode, and an EL layer positioned therebetween is provided. The EL layer includes a stack of a hole-injection layer, a first layer, a second layer, a third layer, and a fourth layer; the hole-injection layer includes an organic acceptor; the first layer, the second layer and the third layer include first, second and third hole-transport materials, respectively; and the fourth layer includes a host material and a light-emitting material; the HOMO level of the second hole-transport material is deeper than that of the first hole-transport material; the HOMO level of the host material is deeper than that of the second hole-transport material; the HOMO level of the third hole-transport material is deeper than or equal to that of the host material; and a HOMO level difference between the second and third hole-transport materials is less than or equal to 0.3 eV.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: April 23, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori Suzuki, Yusuke Takita, Satoshi Seo
  • Publication number: 20190036036
    Abstract: To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which TTA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
    Type: Application
    Filed: October 4, 2018
    Publication date: January 31, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue OSAKA, Yusuke TAKITA, Naoaki HASHIMOTO, Tsunenori SUZUKI, Kunihiko SUZUKI, Satoshi SEO
  • Publication number: 20180358562
    Abstract: An object is to provide a light-emitting element with a favorable lifetime.
    Type: Application
    Filed: December 6, 2016
    Publication date: December 13, 2018
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yusuke TAKITA, Satoshi SEO, Tsunenori SUZUKI, Harue OSAKA
  • Patent number: 10096783
    Abstract: To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which TTA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: October 9, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue Osaka, Yusuke Takita, Naoaki Hashimoto, Tsunenori Suzuki, Kunihiko Suzuki, Satoshi Seo
  • Publication number: 20180182961
    Abstract: An object of one embodiment of the present invention is to provide a novel organic compound. The organic compound is a triarylamine derivative. The triarylamine derivative has an aryl group including a skeleton in which a naphthyl group is bonded to a naphthylene group. The other two aryl groups are each independently a phenyl group, a biphenyl group, or a terphenyl group. These groups may each have a substituent. As the substituent, an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms can be selected.
    Type: Application
    Filed: December 27, 2017
    Publication date: June 28, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Kawakami, Anna Tada, Yusuke Takita, Tsunenori Suzuki, Naoaki Hashimoto, Satoshi Seo
  • Publication number: 20180033993
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.
    Type: Application
    Filed: July 25, 2017
    Publication date: February 1, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori SUZUKI, Yusuke TAKITA, Naoaki HASHIMOTO
  • Publication number: 20180026207
    Abstract: To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which FIA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
    Type: Application
    Filed: July 18, 2017
    Publication date: January 25, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue OSAKA, Yusuke TAKITA, Naoaki HASHIMOTO, Tsunenori SUZUKI, Kunihiko SUZUKI, Satoshi SEO
  • Publication number: 20170250346
    Abstract: A novel compound in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. The organic compound includes an anthracene skeleton, an arylene group, and a substituted or unsubstituted heterocyclic group including a carbazole skeleton. The anthracene skeleton and the substituted or unsubstituted heterocyclic group including the carbazole skeleton are bonded to each other through the arylene group. The anthracene skeleton includes an aryl group at the 2-position or the 3-position.
    Type: Application
    Filed: February 23, 2017
    Publication date: August 31, 2017
    Inventors: Satoshi SEO, Tsunenori SUZUKI, Tomohiro KUBOTA, Naoaki HASHIMOTO, Yusuke TAKITA
  • Publication number: 20170222156
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. A novel organic compound is provided. A novel organic compound having a hole-transport property is provided. A novel hole-transport material is provided. A hole-transport material including an organic compound having a substituted or unsubstituted benzonaphthofuran skeleton and a substituted or unsubstituted amine skeleton is provided. A light-emitting element using the hole-transport material is provided. An organic compound in which an amine skeleton including two aromatic hydrocarbon groups having 6 to 60 carbon atoms is bonded to the 6- or 8-position of the benzonaphthofuran skeleton is provided.
    Type: Application
    Filed: January 26, 2017
    Publication date: August 3, 2017
    Inventors: Sachiko KAWAKAMI, Tsunenori SUZUKI, Yusuke TAKITA, Satoshi SEO
  • Publication number: 20170125704
    Abstract: Provided is a novel organic compound or a light-emitting element material. The organic compound includes an aromatic hydrocarbon group having 6 to 100 carbon atoms in the 5-position of benzo[a]carbazole and an aromatic hydrocarbon group having 6 to 30 carbon atoms in the 11-position thereof. The light-emitting element material includes the organic compound.
    Type: Application
    Filed: October 26, 2016
    Publication date: May 4, 2017
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hiroki Suzuki, Sachiko KAWAKAMI, Satoshi SEO, Tsunenori SUZUKI, Naoaki Hashimoto, Yusuke TAKITA
  • Publication number: 20170062734
    Abstract: A light-emitting element including a first electrode, a second electrode, and an EL layer positioned therebetween is provided. The EL layer includes a stack of a hole-injection layer, a first layer, a second layer, a third layer, and a fourth layer; the hole-injection layer includes an organic acceptor; the first layer, the second layer and the third layer include first, second and third hole-transport materials, respectively; and the fourth layer includes a host material and a light-emitting material; the HOMO level of the second hole-transport material is deeper than that of the first hole-transport material; the HOMO level of the host material is deeper than that of the second hole-transport material; the HOMO level of the third hole-transport material is deeper than or equal to that of the host material; and a HOMO level difference between the second and third hole-transport materials is less than or equal to 0.3 eV.
    Type: Application
    Filed: August 11, 2016
    Publication date: March 2, 2017
    Inventors: Tsunenori Suzuki, Yusuke Takita, Satoshi Seo
  • Publication number: 20170040535
    Abstract: In an organic compound, two groups each including a benzonaphthofuranylamine skeleton are bonded to a central skeleton including a fluorene skeleton. The organic compound emits favorable blue light. Furthermore, the organic compound has a high hole-transport property.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 9, 2017
    Inventors: Kaori OGITA, Sachiko KAWAKAMI, Tsunenori SUZUKI, Naoaki HASHIMOTO, Yusuke TAKITA, Satoshi SEO