Patents by Inventor Kohjirou Hara

Kohjirou 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).

  • Semiconductor thin film electrodes made by using organic dyes as the photosensitizer and photoelectric conversion devices
    Patent number: 7262361
    Abstract: A semiconductor film electrode using a specific organic dye sensitizer, a high efficiency dye-sensitized photovoltaic conversion element using the electrode, and a dye-sensitized photoelectrochemical solar cell using the element are described. The semiconductor film electrode is characterized by including a semiconductor sensitized with an organic dye having a structure represented by the following formula (1): wherein Z represents a heterocyclic group which may have a substituent, L represents an electron attractive group, R1-R3 each represent a hydrogen atom or a substituent or adjacent two of R1-R3 are taken in combination to represent a ring, M represents a hydrogen atom or a salt-forming cation, and n is an integer of 0 to 3.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: August 28, 2007
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Kohjirou Hara, Kazuhiro Sayama, Hironori Arakawa, Sadaharu Suga, Akira Shinpo, Yasuyo Ooga, Hajime Kusano
  • Semiconductor thin film electrodes made by using organic dyes as the photosensitizer and photoelectric conversion devices
    Publication number: 20040099306
    Abstract: A semiconductor film electrode using a specific organic dye sensitizer, a high efficiency dye-sensitized photovoltaic conversion element using the electrode, and a dye-sensitized photoelectrochemical solar cell using the element are described.
    Type: Application
    Filed: May 1, 2003
    Publication date: May 27, 2004
    Inventors: Kohjirou Hara, Kazuhiro Sayama, Hirononri Arakawa, Sadaharu Suga, Akira Shinpo, Yasuyo Ooga, Hajime Kusano