| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Ultrafast Dynamics of Polythiophene with Phenyl Vinylene Branches Studied by Femtosecond Fluorescence Spectroscopy in Solution |
| CHU Sai-Sai1, GAO Chao2, WANG Shu-Feng1**, GONG Qi-Huang1**
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1State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
2Xi'an Modern Chemistry Research Institute, Xi'an 710065
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| Cite this article: |
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CHU Sai-Sai, GAO Chao, WANG Shu-Feng et al 2011 Chin. Phys. Lett. 28 117802 |
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Abstract Two polythiophene based polymers, poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thiophene] (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, 10 ps and 150 ps, respectively.
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| Keywords:
78.47.D-
82.35.Lr
71.35.-y
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Received: 25 July 2011
Published: 30 October 2011
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| PACS: |
78.47.D-
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(Time resolved spectroscopy (>1 psec))
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82.35.Lr
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(Physical properties of polymers)
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71.35.-y
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(Excitons and related phenomena)
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