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Synthesis and photovoltaic properties of dithienyl benzotriazole based poly(phenylene vinylene)s
Author(s) -
Zhang Zhenhua,
Peng Bo,
Ding Ping,
Liu Bo,
He Yuehui,
Zhou Kechao,
Li Yongfang,
Pan Chunyue,
Zou Yingping
Publication year - 2010
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.33224
Subject(s) - materials science , benzotriazole , pedot:pss , band gap , phenylene , polymer , cyclic voltammetry , polymer chemistry , copolymer , polymer solar cell , side chain , photochemistry , optoelectronics , electrochemistry , chemistry , electrode , composite material , metallurgy
Two new alternating copolymers based on dithienyl benzotriazole segment and phenylene vinyl unit were synthesized by Heck cross coupling method. The polymers exhibited broad absorption bands (from 300 nm to 752 nm for P1 , and from 300 nm to 654 nm for P2 ) in the UV‐visible region with optical bandgap ranging between 1.6 and 1.9 eV and proper electronic energy levels measured by cyclic voltammetry. The photovoltaic properties of the polymers as electron donors with 6.6‐phenyl C61‐butyric acid methyl ester as the electron acceptor in a bulk heterojunction structures were reported. Preliminary results showed moderate power conversion efficiency of 0.36% and 0.4%, respectively, under the illumination of AM 1.5, 100 mW/cm 2 with a device structure of ITO/PEDOT : PSS/polymer : PC 60 BM (1 : 3)/Ca/Al. Furthermore, the side chain effect on properties has also been investigated. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011