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Communication | Regular issue | Vol 83, No. 9, 2011, pp.1977-1982
Published online, 27th June, 2011
DOI: 10.3987/COM-11-12256
Synthesis and Donor-π-Acceptor Properties of Polyfluorene Derivatives Containing a Phenazasiline Moiety and an Electron Acceptor

Katsuhiko Ono,* Takuji Kobayashi, Yumi Sato, Katsuya Eguchi, Shinya Kato, Naoki Kishi, and Tetsuo Soga

*Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Abstract

Two polyfluorene derivatives containing a phenazasiline moiety and an electron acceptor were synthesized by the Suzuki coupling reaction. Molecular weight analysis showed that the two polymers had approximately 14 and 9 fluorene units as well as functional groups. Since these polymers had donor-π-acceptor systems, their absorption edges were red-shifted compared to that of polyfluorene. Cyclic voltammetry experiments indicated that the polymers showed amphoteric redox behavior. Bulk heterojunction solar cells were fabricated using films made of the polymers and a fullerene derivative, and their photovoltaic properties were investigated.