Ultrafast dynamics of excitations in conjugated polymers: A spectroscopic study

被引:18
作者
Chang, R [1 ]
Hayashi, M
Lin, SH
Hsu, JH
Fann, WS
机构
[1] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan
[2] Natl Taiwan Univ, Dept Chem, Taipei 10764, Taiwan
[3] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
关键词
D O I
10.1063/1.1392356
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We construct a microscopic model to describe the excited states of poly(2-methoxy, 5-(2'-ethylhexoxy)-p-(phenylenevinylene) in thin film. Within this model, we deduce that in the high energy region, the nature of excited states in the film is very similar to the species observed in solution phase. Moreover, we propose that the decay process of these excited states involves energy transfer, vibrational relaxation. and dissipation simultaneously, in contrast to the usual argument that assumes exciton migration occurs after vibrational motion reaches thermal equilibrium. As a result, the simulation of time-resolved photoluminescence spectra is in agreement with the experiment. (C) 2001 American Institute of Physics.
引用
收藏
页码:4339 / 4348
页数:10
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