Patents by Inventor Koujirou Hara

Koujirou Hara 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).

  • Ionic gel electrolyte, dye-sensitized photoelectric conversion device and solar cell
    Patent number: 8013241
    Abstract: Disclosed is a novel ionic liquid gel electrolyte having high photoelectric conversion efficiency. Also disclosed are a novel dye-sensitized photoelectric conversion device using such an ionic liquid gel electrolyte, and a solar cell composed of such a dye-sensitized photoelectric conversion device. Specifically disclosed is an ionic liquid gel electrolyte obtained by gelling a liquid electrolyte by using an ionic organic oligomer gelling agent represented by the general formulae (1) and (2) below. Also specifically disclosed are a dye-sensitized photoelectric conversion device, wherein the ionic liquid gel electrolyte is arranged between a counter electrode and a dye-absorbed semiconductor substrate which is arranged in contact with a transparent conductive substrate, and a solar cell.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: September 6, 2011
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Nagatoshi Koumura, Koujirou Hara, Zhong-Sheng Wang, Masaru Yoshida, Nobuyuki Tamaoki
  • Organic compound, semiconductor film electrode employing the organic compound, photoelectric conversion element employing the organic compound, and photoelectrochemical solar cell employing the organic compound
    Patent number: 7973172
    Abstract: The present invention provides: an organic compound increasing an open circuit voltage, and showing high photoelectric conversion efficiency; a semiconductor film electrode employing the organic compound as a dye; a photoelectric conversion element employing the semiconductor film electrode; and a photoelectrochemical solar cell employing the photoelectric conversion element.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: July 5, 2011
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Nagatoshi Koumura, Koujirou Hara
  • ORGANIC COMPOUND, SEMICONDUCTOR FILM ELECTRODE EMPLOYING THE ORGANIC COMPOUND, PHOTOELECTRIC CONVERSION ELEMENT EMPLOYING THE ORGANIC COMPOUND, AND PHOTOELECTROCHEMICAL SOLAR CELL EMPLOYING THE ORGANIC COMPOUND
    Publication number: 20100174095
    Abstract: The present invention provides: an organic compound increasing an open circuit voltage, and showing high photoelectric conversion efficiency; a semiconductor film electrode employing the organic compound as a dye; a photoelectric conversion element employing the semiconductor film electrode; and a photoelectrochemical solar cell employing the photoelectric conversion element.
    Type: Application
    Filed: March 27, 2007
    Publication date: July 8, 2010
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Nagatoshi Koumura, Koujirou Hara
  • IONIC GEL ELECTROLYTE, DYE-SENSITIZED PHOTOELECTRIC CONVERSION DEVICE AND SOLAR CELL
    Publication number: 20090266419
    Abstract: Disclosed is a novel ionic liquid gel electrolyte having high photoelectric conversion efficiency. Also disclosed are a novel dye-sensitized photoelectric conversion device using such an ionic liquid gel electrolyte, and a solar cell composed of such a dye-sensitized photoelectric conversion device. Specifically disclosed is an ionic liquid gel electrolyte obtained by gelling a liquid electrolyte by using an ionic organic oligomer gelling agent represented by the general formulae (1) and (2) below. Also specifically disclosed are a dye-sensitized photoelectric conversion device, wherein the ionic liquid gel electrolyte is arranged between a counter electrode and a dye-absorbed semiconductor substrate which is arranged in contact with a transparent conductive substrate, and a solar cell.
    Type: Application
    Filed: October 16, 2006
    Publication date: October 29, 2009
    Applicant: National Institute Of Advance Industrial Science And Technology
    Inventors: Nagatoshi Koumura, Koujirou Hara, Zhong-Sheng Wang, Masaru Yoshida, Nobuyuki Tamaoki