Patents by Inventor Kohshin Takahashi

Kohshin Takahashi 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).

  • Production method of hole blocking layer, hole blocking layer, photoelectric conversion element, photoelectric conversion device, organic thin-film solar cell panel, and light-emitting device
    Patent number: 9899617
    Abstract: A production method of a hole blocking layer includes: a liquid layer forming step that causes a liquid composition and a surface of a member on which the hole blocking layer is to be formed, to contact with each other thereby forming a liquid layer comprising the liquid composition on the surface of the member on which the hole blocking layer is to be formed, the liquid composition containing a zinc source comprising bis(acetylacetonato)zinc, a complexing agent comprising acetylacetone, and a polar solvent; and a drying step that heats the liquid layer formed by the liquid layer forming step to vaporize the complexing agent and the polar solvent from the liquid layer thereby forming a hole blocking layer comprising zinc oxide on the surface of the member on which the hole blocking layer is to be formed.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: February 20, 2018
    Assignee: Ideal Star Inc.
    Inventors: Takayuki Kuwabara, Morihiko Saida, Kenji Omote, Kohshin Takahashi
  • Hole blocking layer and method for producing same, and photoelectric conversion element comprising the hole blocking layer and method for manufacturing same
    Patent number: 9293721
    Abstract: Provided is a hole-blocking layer which has excellent basic characteristics such as high photoelectric conversion efficiency, while exhibiting excellent productivity. The hole-blocking layer is produced by a process that has a step of bringing an aqueous solution containing hydrogen peroxide and titanium (IV) oxysulfate into contact with the surface of a member on which the hole-blocking layer is to be formed, and holding the contact between the aqueous solution and the member at 50 to 120° C., so that an amorphous titanium oxide precursor precipitates on the surface of the member; and a step of drying the amorphous titanium oxide precursor that has precipitated on the member.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: March 22, 2016
    Assignee: Ideal Star Inc.
    Inventors: Yasuhiko Kasama, Kenji Omote, Morihiko Saida, Haruna Oizumi, Hiroyuki Sagami, Kuniyoshi Yokoo, Takashi Saita, Kohshin Takahashi, Takayuki Kuwabara
  • PRODUCTION METHOD OF HOLE BLOCKING LAYER, HOLE BLOCKING LAYER, PHOTOELECTRIC CONVERSION ELEMENT, PHOTOELECTRIC CONVERSION DEVICE, ORGANIC THIN-FILM SOLAR CELL PANEL, AND LIGHT-EMITTING DEVICE
    Publication number: 20140174512
    Abstract: A production method of a hole blocking layer includes: a liquid layer forming step that causes a liquid composition and a surface of a member on which the hole blocking layer is to be formed, to contact with each other thereby forming a liquid layer comprising the liquid composition on the surface of the member on which the hole blocking layer is to be formed, the liquid composition containing a zinc source comprising bis(acetylacetonato)zinc, a complexing agent comprising acetylacetone, and a polar solvent; and a drying step that heats the liquid layer formed by the liquid layer forming step to vaporize the complexing agent and the polar solvent from the liquid layer thereby forming a hole blocking layer comprising zinc oxide on the surface of the member on which the hole blocking layer is to be formed.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: Ideal Star Inc.
    Inventors: Takayuki Kuwabara, Morihiko Saida, Kenji Omote, Kohshin Takahashi
  • Hole Blocking Layer and Method for Producing Same, and Photoelectric Conversion Element Comprising the Hole Blocking Layer and Method for Manufacturing Same
    Publication number: 20120211730
    Abstract: Provided is a hole-blocking layer which has excellent basic characteristics such as high photoelectric conversion efficiency, while exhibiting excellent productivity. The hole-blocking layer is produced by a process that has a step of bringing an aqueous solution containing hydrogen peroxide and titanium (IV) oxysulfate into contact with the surface of a member on which the hole-blocking layer is to be formed, and holding the contact between the aqueous solution and the member at 50 to 120° C., so that an amorphous titanium oxide precursor precipitates on the surface of the member; and a step of drying the amorphous titanium oxide precursor that has precipitated on the member.
    Type: Application
    Filed: August 11, 2010
    Publication date: August 23, 2012
    Applicant: IDEAL STAR INC.
    Inventors: Yasuhiko Kasama, Kenji Omote, Morihiko Saida, Haruna Oizumi, Hiroyuki Sagami, Kuniyoshi Yokoo, Takashi Saita, Kohshin Takahashi, Takayuki Kuwabara
  • Organic solar cell and its production process
    Publication number: 20050039792
    Abstract: An object of the present invention is to enhance the photoelectric conversion performance to more than the limit possessed by prior organic solar cells in arts of organic solar cells in which an organic semiconductor layer is constituted by at least two material layers.
    Type: Application
    Filed: August 11, 2004
    Publication date: February 24, 2005
    Inventors: Kohshin Takahashi, Junichi Nakamura, Chiho Yokoe, Kazuhiko Murata
  • Pigment-sensitized solar cell
    Publication number: 20030155004
    Abstract: It is an object of the present invention to provide a dye-sensitized solar cell with high cell performance.
    Type: Application
    Filed: January 28, 2003
    Publication date: August 21, 2003
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Kohshin Takahashi, Kiyoaki Imoto, Junichi Nakamura