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Synthesis and Photovoltaic Properties of Alternating Conjugated Polymers Derived from Indeno[1,2‐ b ]fluorene and Bithiophene or Thieno[3,2‐ b ]thiophene‐Cored Benzothiadiazole
Author(s) -
Xia Yangjun,
He Zhicai,
Tong Junfeng,
Li Bin,
Wang Chenglong,
Cao Yong,
Wu Hongbin,
Woo Han Young,
Fan Duowang
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000759
Subject(s) - pedot:pss , fluorene , thiophene , materials science , copolymer , conjugated system , energy conversion efficiency , polymer chemistry , band gap , polymer , photovoltaic system , photochemistry , organic chemistry , optoelectronics , chemistry , composite material , ecology , biology
Two narrow bandgap copolymers derived from 6,6′,12,12′‐tetraoctyl‐indeno[1,2‐ b ]fluorene and bithiophene or thieno[3,2‐ b ]thiophene‐cored benzothiadiazole are synthesized and characterized. The copolymers show broad absorption in the range 350–700 nm. The application of the copolymers as photovoltaic cells with configurations ITO/PEDOT:PSS/blend/Al and ITO/PEDOT:PSS/blend/interlayer/Al is investigated. A power conversion efficiency (PCE) of approximately 3.0% is achieved under an AM 1.5G solar simulator (80 mW cm −2 ) for the cells with ITO/PEDOT:PSS/polymer:PC 71 BM([6,6]‐phenyl‐C 71 butyric acid methyl ester) (1:4)/interlayer/Al.