Ultrafast carrier dynamics on conjugated poly(3-hexylthiophene)/[6,6]-phenylC61-butyric acid methyl ester composites

被引：29
作者：
Lioudakis, Emmanouil
Othonos, Andreas
Alexandrou, Ioannis
Hayashi, Yasuhiko
机构：
[1] Univ Cyprus, Res Ctr Ultrafast Sci, Dept Phys, CY-1678 Nicosia, Cyprus
[2] Univ Liverpool, Dept Elect Engn & Elect, Liverpool L69 3GJ, Merseyside, England
[3] Nagoya Inst Technol, Dept Environm Technol & Urban Planning, Nagoya, Aichi 4668555, Japan
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 11期
关键词：
SEMICONDUCTORS; POLYMERS;
D O I：
10.1063/1.2785120
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The authors have studied ultrafast carrier dynamics on poly(3-hexylthiophene)/[6,6]-phenylC(61)-butyric acid methyl ester (PCBM) composites up to 50% PCBM concentration. They have resolved the exciton intraband relaxation of composites as well as the subsequent electron/polaron relaxation of dissociated excitons. The observed fast time constant of intraband relaxation is found to be 0.5-1.5 ps, whereas the second long-live relaxation (0.5-1 ns) is strongly fullerene related. A wavelength dependent ultrafast study is performed giving fundamental information on the nonradiative exciton relaxation, exciton dissociation, and electron relaxation of PCBM-related states.
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