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Proceedings Paper

Organic photovoltaics based on solution-processed benzoporphyrin
Author(s): Yoshiharu Sato; Takaaki Niinomi; Masahiko Hashiguchi; Yutaka Matsuo; Eiichi Nakamura
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Paper Abstract

Organic photovoltaic cell is fabricated with tetrabenzoporhyrin (BP) as a donor material. Tetrabenzoporhyrin is formed by thermal conversion of the soluble precursor that has four bicycle rings instead of benzo-rings. Upon heat treatment above 150°C, the precursor molecule is converted to semiconductive benzoporphyrin, which is insoluble against conventional organic solvents. Hetero junction OPV cell is made of benzoporhyrin/fullerene layers with power conversion efficiency of 2.2%. Taking advantage of insoluble character of BP, p-i-n heterojunction OPV is successfully fabricated from solution, with BP/BP:fullerene/fullerene layers. This solution-processed p-i-n device exhibited further improvement of power conversion efficiency, 3.0%.

Paper Details

Date Published: 13 November 2007
PDF: 9 pages
Proc. SPIE 6656, Organic Photovoltaics VIII, 66560U (13 November 2007); doi: 10.1117/12.733804
Show Author Affiliations
Yoshiharu Sato, Japan Science and Technology Agency (Japan)
Takaaki Niinomi, Japan Science and Technology Agency (Japan)
Masahiko Hashiguchi, Japan Science and Technology Agency (Japan)
Yutaka Matsuo, Japan Science and Technology Agency (Japan)
Eiichi Nakamura, Japan Science and Technology Agency (Japan)
Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6656:
Organic Photovoltaics VIII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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