Free carrier photogeneration in polythiophene versus poly(phenylene vinylene) studied with THz spectroscopy

被引：41

作者：

Hendry, E.

Koeberg, M.

Schins, J. M.

Siebbeles, L. D. A.

Bonn, M.

机构：

[1] FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands

[2] Univ Exeter, Sch Phys, Electromagnet Mat Grp, Exeter EX4 4QL, Devon, England

[3] Delft Univ Technol, Fac Sci Appl, DelfChemTech, NL-2628 BL Delft, Netherlands

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 432卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2006.10.105

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：

Using THz time domain spectroscopy, we investigate ultrafast photoconductivity in two conjugated polymers, derivatives of poly(phenylene vinylene) (MEH-PPV) and polythiophene (RR-P3HT), to investigate free charge carrier dynamics. We find that the ultrafast photo-conductivity due to free charges is larger in the RR-P3HT than in the MEH-PPV sample. These charges are long-lived, remaining mobile for several nanoseconds, in contrast to the picosecond decay of free charges in MEH-PPV. By comparing our measured conductivities to charge mobilities inferred from microwave absorption measurements, we make estimates for the free carrier quantum yields. (c) 2006 Published by Elsevier B.V.

引用

页码：441 / 445

页数：5

共 31 条

[1] Hot exciton dissociation in a conjugated polymer [J].