Polaron dynamics in thin polythiophene films studied with time-resolved photoemission

被引：0
|
作者：
Erwan Varene
Petra Tegeder
机构：
[1] Freie Universität Berlin,Fachbereich Physik
来源：
Applied Physics A | 2012年 / 107卷
关键词：
Polaron Band; P3HT Film; Excited State Dynamic; Visible Pulse; Regioregular Poly;
D O I：
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学科分类号：
摘要：
Femtosecond time-resolved two-photon photoemission spectroscopy is employed to study the dynamics of an excited state in a thin regioregular poly(3-hexylthiophene) (RR-P3HT) film deposited on a conducting polymer poly(3,4-ethylene-dioxythiophene): poly-(styrenesulfonate) (PEDT:PSS) electrode following optical excitation at 2.1 eV. We found that the biexponential decay of this excited state has a fast component (2.6 ps) assigned to bound polaron pairs which recombine quickly or separate to be added to the slow component (7.6 ps). The latter is attributed to polarons generated via charge transfer between adjacent polymer chains.
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页码：13 / 16
页数：3
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