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Enhanced Performance of Organic Photovoltaic Cells Fabricated with a Methyl Thiophene‐3‐Carboxylate‐Containing Alternating Conjugated Copolymer
Author(s) -
Cho Min Ju,
Seo Jangwon,
Kim Kyung Hwan,
Choi Dong Hoon,
Prasad Paras N.
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100501
Subject(s) - copolymer , thiophene , polymer solar cell , conjugated system , materials science , polymer chemistry , energy conversion efficiency , open circuit voltage , carboxylate , acceptor , organic solar cell , electron acceptor , polymer , electron donor , short circuit , photochemistry , organic chemistry , chemistry , voltage , optoelectronics , catalysis , physics , composite material , quantum mechanics , condensed matter physics
A new donor‐acceptor copolymer, containing benzodithiophene (BDT) and methyl thiophene‐3‐carboxylate (3MT) units, is designed and synthesized for polymer solar cells (PSCs). The 3MT unit is used as an electron acceptor unit in this copolymer to provide a lower highest occupied molecular orbital (HOMO) level for obtaining polymer solar cells with a higher open‐circuit voltage ( V OC ). The resulting bulk heterojunction PSC made of the copolymer and [6,6]‐phenyl‐C71‐butyric acid methyl ester (PC 71 BM) exhibits a power conversion efficiency (PCE) up to 4.52%, a short circuit current ( J SC ) of 10.5 mA·cm‐ 2 , and a V OC of 0.86 V.