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Kwang-Hoi Lee, Ho-Jin Lee, Kouji Kuramoto, Yohei Tanaka, Kazuhide Morino, Atsushi Sudo, Tatsuo Okauchi, Akihito Tsuge and Takeshi Endo Polythiophenes bearing electron-withdrawing groups in the side chain and their application to bulk heterojunction solar cells Journal of Polymer Science Part A: Polymer Chemistry 49

Article first published online: 11 NOV 2010 | DOI: 10.1002/pola.24444

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Novel polythiophenes PTDCN and PTCNME exhibited very low-lying HOMO energy levels of −5.53 eV and −5.29 eV, respectively, because of the introduction of strong electron-withdrawing groups in the side chains. The photovoltaic properties of the solar cells based on the polymers were investigated. The bulk heterojunction polymer solar cells fabricated by using blend films of polymers as electron donors and PC61BH as electron acceptor exhibited power conversion efficiencies (PCEs) of 0.56% and 0.72% for PTDCN and PTCNME, respectively.

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