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Synthesis and characterizations of poly(4‐alkylthiazole vinylene)
Author(s) -
Guo Xia,
Fan Haijun,
Zhang Maojie,
Huang Yu,
Tan Songting,
Li Yongfang
Publication year - 2011
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.35106
Subject(s) - materials science , thermal stability , band gap , polymer , homo/lumo , energy conversion efficiency , polymer chemistry , cyclic voltammetry , stille reaction , chemistry , electrode , organic chemistry , molecule , electrochemistry , optoelectronics , composite material
Two poly(thiazole vinylene) derivatives, poly(4‐hexylthiazole vinylene) (P4HTzV) and poly(4‐nonylthiazole vinylene) (P4NTzV), were synthesized by Pd‐catalyzed Stille coupling method. The polymers are soluble in common organic solvents such as o ‐dichlorobenzene and chloroform, and possess good thermal stability. P4HTzV and P4NTzV films exhibit broad absorption bands at 400–720 nm with an optical bandgap of 1.77 eV and 1.74 eV, respectively. The HOMO (the highest occupied molecular orbital) energy levels of P4HTzV and P4NTzV are −5.11 and −5.12 eV, respectively, measured by cyclic voltammetry. Preliminary results of the polymer solar cells based on P4HTzV : PC 61 BM ([6,6]‐phenyl‐C‐61‐butyric acid methyl ester) (1 : 1, w/w) show a power conversion efficiency of 0.21% with an open‐circuit voltage of 0.55 V and a short circuit current density of 1.11 mA cm −2 , under the illumination of AM1.5G, 100 mW cm −2 . © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012