Patents by Inventor Tetsurou Suzuki

Tetsurou Suzuki 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).

  • Photovoltaic device containing organic material layers and having high conversion efficiency
    Patent number: 5201961
    Abstract: The present invention discloses a photovoltaic device comprising a portion containing three layers disposed between two electrodes, at least one of which is light transmittable; wherein said three layers consist of a first layer of organic electron acceptor material, a second layer of organic electron donor material and a third layer of organic electron donor material different from the material of the second layer; or a first layer of organic electron donor material, a second layer of organic electron acceptor material and a third layer of organic electron acceptor material different from the acceptor material of the second layer, the sequence of the three layers being counted from a light incident side; and the device having a high photoelectric conversion efficiency.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: April 13, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Masao Yoshikawa, Tetsurou Suzuki