Patents by Inventor Yong-Jin Pu

Yong-Jin Pu 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: 20230276701
    Abstract: In order to provide an organic compound that can be suitably used as a luminescent material for a display, and an organic light emitting device containing such an organic compound, an organic compound in accordance with an embodiment of the present invention has a lone electron-pair and a ? E electron orbit, and in the organic compound, an energy gap ?EST obtained by subtracting an energy level ET1 of a lowest triplet excitation state T1 from an energy level ES1 of a lowest singlet excitation mode S1 is ?0.20 eV??EST<0.0090 eV.
    Type: Application
    Filed: June 15, 2021
    Publication date: August 31, 2023
    Inventors: Daigo MIYAJIMA, Naoya AIZAWA, Yong-Jin PU, Atsuko NIHONYANAGI, Ryotaro IBUKA, Hiroyuki INUDUKA
  • Patent number: 10529954
    Abstract: An object of the present invention is to provide an organic thin-film laminate capable of suppressing function reduction even when an intermediate layer is formed using a wet method. The organic thin-film laminate has one or more organic functional layers, the organic thin-film laminate being characterized by being provided with: a first light-emitting layer 12 containing a first light-emitting-layer material that is soluble in a polar solvent other than a fluorinated solvent, and is insoluble in a fluorinated solvent; a second light-emitting layer 14 laminated on the first light-emitting layer 12; and one or more intermediate layers comprising a non-curable material, the intermediate layers being provided between the first light-emitting layer 12 and the second light-emitting layer 14, an intermediate layer 13, among the one or more intermediate layers, containing a conductive polymer having no polymerizable group and containing a fluorinated solvent in the range of 1-1000 mass ppm.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: January 7, 2020
    Assignees: KONICA MINOLTA, INC., NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Kazuhiro Oikawa, Toshihiko Iwasaki, Takayuki Chiba, Yong-Jin Pu, Junji Kido
  • Publication number: 20180183011
    Abstract: An object of the present invention is to provide an organic thin-film laminate capable of suppressing function reduction even when an intermediate layer is formed using a wet method. The organic thin-film laminate has one or more organic functional layers, the organic thin-film laminate being characterized by being provided with: a first light-emitting layer 12 containing a first light-emitting-layer material that is soluble in a polar solvent other than a fluorinated solvent, and is insoluble in a fluorinated solvent; a second light-emitting layer 14 laminated on the first light-emitting layer 12; and one or more intermediate layers comprising a non-curable material, the intermediate layers being provided between the first light-emitting layer 12 and the second light-emitting layer 14, an intermediate layer 13, among the one or more intermediate layers, containing a conductive polymer having no polymerizable group and containing a fluorinated solvent in the range of 1-1000 mass ppm.
    Type: Application
    Filed: March 18, 2016
    Publication date: June 28, 2018
    Inventors: Kazuhiro OIKAWA, Toshihiko IWASAKI, Takayuki CHIBA, Yong-Jin PU, Junji KIDO
  • Patent number: 9425411
    Abstract: To provide an organic electroluminescent element that can attain efficiency improvement by forming an electron injection layer by a film that is stable and excellent in uniformity, and forming a charge generation layer capable of effectively exhibiting the function. In an organic electroluminescent element provided with at least one organic layer between a pair of electrodes, an electron injection layer comprising a ZnO-containing layer, and a charge generation layer containing an electron acceptor-containing film in contact with the cathode side thereof and an electron donor-containing film adjacent thereto are formed.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: August 23, 2016
    Assignee: NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Yong-Jin Pu, Takayuki Chiba, Junji Kido, Sei Satoh, Kazushige Ideta
  • Patent number: 9373823
    Abstract: In a coating-type electron injection layer or electron transport layer using a metal oxide, the present invention aims at improving uniformity or stability of composition distribution and adhesion with another adjoining constituent layer, and improving film forming property, to thereby provide an organic electronic device and manufacture of the device whose efficiency is improved. In the organic electronic device having one pair of electrodes on a substrate, and having at least one organic layer between the electrodes, the electron injection layer or the electron transport layer is formed by application of a liquid material in which an alkaline metal salt and zinc-oxide nano particles are dissolved in alcohol.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: June 21, 2016
    Assignee: NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Takayuki Chiba, Yang Yang, Yong-Jin Pu, Junji Kido
  • Publication number: 20160020406
    Abstract: To provide an organic electroluminescent element that can attain efficiency improvement by forming an electron injection layer by a film that is stable and excellent in uniformity, and forming a charge generation layer capable of effectively exhibiting the function. In an organic electroluminescent element provided with at least one organic layer between a pair of electrodes, an electron injection layer comprising a ZnO-containing layer, and a charge generation layer containing an electron acceptor-containing film in contact with the cathode side thereof and an electron donor-containing film adjacent thereto are formed.
    Type: Application
    Filed: February 15, 2013
    Publication date: January 21, 2016
    Inventors: Yong-Jin PU, Takayuki CHIBA, Junji KIDO, Sei SATOH, Kazushige IDETA
  • Patent number: 8927972
    Abstract: A current-amplifying transistor device is provided, between an emitter electrode and a collector electrode, with two organic semiconductor layers and a sheet-shaped base electrode. One of the organic semiconductor layers is arranged between the emitter electrode and the base collector electrode, and has a diode structure of a p-type organic semiconductor layer and an n-type p-type organic semiconductor layer. A current-amplifying, light-emitting transistor device including the current-amplifying transistor device and an organic EL device portion formed in the current-amplifying transistor device is also disclosed.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: January 6, 2015
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Fumito Suzuki, Naomi Oguma, Naoki Hirata
  • Patent number: 8895963
    Abstract: An organic semiconductor material is represented by the following formula (F): wherein A represents a cyclic conjugated skeleton structure formed of one or more aromatic rings, and R1 and R2 each independently represent a substituted or unsubstituted alkyl group. The organic semiconductor material has high electron mobility and high on/off ratio, and can form an organic semiconductor thin film by a solution process making use of its solution.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: November 25, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Yohei Hashimoto, Naomi Oguma, Naoki Hirata
  • Publication number: 20140084280
    Abstract: In a coating-type electron injection layer or electron transport layer using a metal oxide, the present invention aims at improving uniformity or stability of composition distribution and adhesion with another adjoining constituent layer, and improving film forming property, to thereby provide an organic electronic device and manufacture of the device whose efficiency is improved. In the organic electronic device having one pair of electrodes on a substrate, and having at least one organic layer between the electrodes, the electron injection layer or the electron transport layer is formed by application of a liquid material in which an alkaline metal salt and zinc-oxide nano particles are dissolved in alcohol.
    Type: Application
    Filed: August 11, 2011
    Publication date: March 27, 2014
    Applicant: NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY
    Inventors: Takayuki Chiba, Yang Yang, Yong-Jin Pu, Junji Kido
  • Publication number: 20120146011
    Abstract: A current-amplifying transistor device is provided, between an emitter electrode and a collector electrode, with two organic semiconductor layers and a sheet-shaped base electrode. One of the organic semiconductor layers is arranged between the emitter electrode and the base collector electrode, and has a diode structure of a p-type organic semiconductor layer and an n-type p-type organic semiconductor layer. A current-amplifying, light-emitting transistor device including the current-amplifying transistor device and an organic EL device portion formed in the current-amplifying transistor device is also disclosed.
    Type: Application
    Filed: September 3, 2010
    Publication date: June 14, 2012
    Applicants: KEN-ICHI NAKAYAMA, DAINICHISEIKA COLOR & CHEMICALS Mfg.Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Fumito Suzuki, Naomi Oguma, Naoki Hirata
  • Publication number: 20120056166
    Abstract: An organic semiconductor material is represented by the following formula (F): wherein A represents a cyclic conjugated skeleton structure formed of one or more aromatic rings, and R1 and R2 each independently represent a substituted or unsubstituted alkyl group. The organic semiconductor material has high electron mobility and high on/off ratio, and can form an organic semiconductor thin film by a solution process making use of its solution.
    Type: Application
    Filed: May 11, 2010
    Publication date: March 8, 2012
    Applicants: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Yohei Hashimoto, Naomi Oguma, Naoki Hirata