Electron -: hole separation distance during the charge carrier photogeneration in conjugated polymer

被引：4
|
作者：
Gulbinas, V [1 ]
Bässler, H [1 ]
Yartsev, A [1 ]
Zaushitsyn, Y [1 ]
Sundström, V [1 ]
机构：
[1] Inst Phis, LT-2600 Vilnius, Lithuania
来源：
ADVANCED ORGANIC AND INORGANIC OPTICAL MATERIALS | 2003年 / 5122卷
关键词：
photoconductivity; conjugated polymer; ultrafast spectroscopy; excitons; charge carriers; Stark-shift;
D O I：
10.1117/12.515659
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Charge separation dynamics in a Ladder-Type Methyl substituted Poly(Para-Phenylene) (m-LPPP) was investigated by means of electric filed modulated femtosecond pump-probe absorption spectroscopy. The Stark shift of the absorption band modified by created excitons and electron-hole pairs provided information about the average intrapair charge separation distance. The electron and hole initially separated by ca. 7 Angstrom moved away from each other to more than 30 Angstrom during 600 ps and later the separation rate decreased. Neither the initial separation distance, nor that obtained at 600 ps were found to depend on the applied electric field, only the separation rate at stronger field was slightly faster.
引用
收藏
页码：156 / 162
页数：7
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