Ultrafast Dynamics of Polythiophene with Phenyl Vinylene Branches Studied by Femtosecond Fluorescence Spectroscopy in Solution

Two polythiophene based polymers, poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thio p hene] (PT1) and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene) (PT2), are synthesized and investigated by static, picosecond fluorescence spectroscopies and the femtosecond up-conversion...

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Bibliographic Details
Published inChinese physics letters Vol. 28; no. 11; pp. 117802 - 1-117802-4
Main Authors Chu, Sai-Sai (赛赛 褚), Gao, Chao (潮高), Wang, Shu-Feng (树峰 王), Gong, Qi-Huang (旗煌 龚)
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2011
Subjects
Dynamic tests
Femtosecond
Fluorescence
Phenyls
Polythiophene
Quenching
Spectroscopy
Twisting
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Summary:Two polythiophene based polymers, poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thio p hene] (PT1) and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene) (PT2), are synthesized and investigated by static, picosecond fluorescence spectroscopies and the femtosecond up-conversion technique in solution. Compared with pristine poly(3-hexylthiophene) (P3HT), PT1 and PT2, in which the main chains are decorated with phenyl vinylene present a 'camel back' structure in the absorption spectra. Phenyl vinylene side chains induce a new process of charge transfer, chain twisting motion and defect-induced fluorescence quenching at time scales of 1 ps, 10ps and 150 ps, respectively.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/28/11/117802