A Thieno[3,4-<i>c</i>]pyrrole-4,6-dione-Based Copolymer for Efficient Solar Cells

Yingping Zou(Institute for Microstructural Sciences), Ahmed Najari(Institute for Microstructural Sciences), Philippe Berrouard(Institute for Microstructural Sciences), Serge Beaupré(Université Laval), Badrou Réda Aïch(Université Laval), Ye Tao(Université Laval), Mario Leclerc(Université Laval)
Journal of the American Chemical Society
March 29, 2010
10.1021/ja101888b
Cited by 766Open Access
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Abstract

A new low-band-gap thieno[3,4-c]pyrrole-4,6-dione-based copolymer, PBDTTPD, has been designed and synthesized. PBDTTPD is soluble in chloroform or o-dichlorobenzene upon heating and shows a broad absorption in the visible region. The HOMO and LUMO energy levels were estimated to be at -5.56 and -3.75 eV, respectively. These electrochemical measurements fit well with an optical bandgap of 1.8 eV. When blended with PC(71)BM, this polymer demonstrated a power conversion efficiency of 5.5% in a bulk-heterojunction photovoltaic device having an active area of 1.0 cm(2).

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