A Thieno[3,4-c]pyrrole-4,6-dione-Based Copolymer for Efficient Solar Cells
Journal of the American Chemical Society2010Vol. 132(15), pp. 5330–5331
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Yingping Zou, Ahmed Najari, Philippe Berrouard, Serge Beaupré, Badrou Réda Aïch, Ye Tao, Mario Leclerc
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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