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13 November 2007 Organic photovoltaics based on solution-processed benzoporphyrin
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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%.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yoshiharu Sato, Takaaki Niinomi, Masahiko Hashiguchi, Yutaka Matsuo, and Eiichi Nakamura "Organic photovoltaics based on solution-processed benzoporphyrin", Proc. SPIE 6656, Organic Photovoltaics VIII, 66560U (13 November 2007); https://doi.org/10.1117/12.733804
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