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Synthesis and Photovoltaic Effect in Dithieno[2,3‐ d :2′,3′‐ d ′]Benzo[1,2‐ b :4,5‐ b ′]dithiophene‐Based Conjugated Polymers
Author(s) -
Son Hae Jung,
Lu Luyao,
Chen Wei,
Xu Tao,
Zheng Tianyue,
Carsten Bridget,
Strzalka Joseph,
Darling Seth B.,
Chen Lin X.,
Yu Luping
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201204238
Subject(s) - materials science , conjugated system , miscibility , polymer , energy conversion efficiency , polymer solar cell , copolymer , absorption (acoustics) , photovoltaic system , chemical engineering , polymer chemistry , organic solar cell , optoelectronics , composite material , ecology , engineering , biology
Conjugated polymers based on a heteroacene, 3,7‐dialkyl‐dithieno[2,3‐ d :2′,3′‐ d ′]benzo[1,2‐ b :4,5‐ b ′]dithiophene (DBD), are synthesized. These polymers show broad UV–vis absorption with energy bandgaps below 1.7 eV. PTDBD2, showing good miscibility in a polymer/phenyl‐C71‐butyric acid methyl ester (PC 71 BM) blend film, achieves a power conversion efficiency (PCE) of 7.6%. The results indicate that copolymers containing DBD are promising candidates for high‐performance organic solar cells.