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Synthesis of a terpolymer containing fluorene, side chain conjugated thiophene and benzothiadiazole and its applications in photovoltaic devices
Author(s) -
Liu Hongli,
Qu Bo,
Chen Jian,
Cong Zhiyuan,
An Zhongwei,
Gao Chao,
Xiao Lixin,
Chen Zhijian,
Gong Qihuang
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38528
Subject(s) - fluorene , thiophene , materials science , side chain , conjugated system , copolymer , polymer chemistry , polymer solar cell , polymer , thermal stability , suzuki reaction , energy conversion efficiency , chemical engineering , palladium , organic chemistry , chemistry , catalysis , optoelectronics , composite material , engineering
A terpolymer (POTVTh‐8FO‐DBT) containing fluorene, side chain conjugated thiophene and 4,7‐dithieny‐2,1,3‐benzothiadiazole was synthesized by palladium‐catalyzed Suzuki coupling method. The polymer is soluble in common organic solvents. The thermal, absorption, and electrochemical properties of the polymer were examined. Photovoltaic properties of POTVTh‐8FO‐DBT were studied by fabricating the polymer solar cells (PSCs) based on POTVTh‐8FO‐DBT as donor and [6,6]‐phenyl‐C61‐butyric acid methyl ester (PC 61 BM) as acceptor. With the weight ratio of POTVTh‐8FO‐DBT : PC 61 BM of 1 : 1 and the active layer thickness of 80 nm, the power conversion efficiency (PCE) of the device reached 0.47% with V oc = 0.61 V, J sc = 1.61 mA/cm 2 , and filled factor (FF) = 0.49 under the illumination of AM 1.5, 100 mW/cm 2 . The results indicated that this polymer was promising donor candidates in the application of PSCs. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013