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Optical, electrochemical, and photovoltaic properties of conjugated polymers with dithiafulvalene as side chains
Author(s) -
Gu Chuantao,
Du Zhengkun,
Shen Wenfei,
Bao Xichang,
Wen Shuguang,
Zhu Dangqiang,
Wang Ting,
Wang Ning,
Yang Renqiang
Publication year - 2015
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.41508
Subject(s) - side chain , conjugated system , polymer , materials science , cyclic voltammetry , polymer chemistry , electrochemistry , band gap , ultraviolet , photochemistry , chemical engineering , chemistry , electrode , optoelectronics , composite material , engineering
Three conjugated polymers, P1–P3, with dithiafulvalene (DTF) as side chains have been synthesized. All polymers have good thermal stabilities. The DTF unit could be oxidized to DTF• + which was observed from cyclic voltammetry and ultraviolet–visible (UV–vis) spectra, and the oxidation process was independent of the conjugated backbone of the polymer. The strong π–π* transition absorbing band of the three polymers decreases gradually as increasing oxidation, and the resulting DTF• + species give rise to an additional band at 750–1100 nm, which can be assigned to a distinguishing feature of the cation radical species. Photovoltaic device based on the blend of P2 and [6,6]‐phenyl‐C61‐butyric acid methyl ester (PC 61 BM) showed the power conversion efficiency of 1.05% with a fill factor of 42.8%. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41508.