Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo

Optc Co., Ltd.

Toshiki Koyama

Yoshio Taniguchi

Yasunori Taga

Hisayoshi Fujikawa

Chihaya Adachi

Shizuo Tokito

Koji Noda

Sadaharu Suga

Makoto Satsuki

Atsushi Miura

Akira Shinpo

Tomoyasu Saitou

Kentaro Yano

Fumio Matsui

Hirofumi Mitekura

Michifumi Nagawa

4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.

4-cyanocoumarin derivatives and uses thereof

The objects of the present invention are to provide semiconductor layers for obtaining solar cells having a relatively high energy conversion efficiency, solar cells using the same, and their production methods and uses; all of which are solved by providing semiconductor layers that are used in solar cells and constructed by semiconductor particle groups having a plurality of peaks in particle size distribution, solar cells using the same, and their production methods and uses.

Semiconductor layer, solar cell using it, and production methods and applications thereof

Organic semiconductor laser device

Growing community of inventors

Nagano, Japan

Toshiki Koyama