Picosecond photophysics of luminescent conducting polymers; from excitons to polaron pairs.

被引：25

作者：

Frolov, SV ^{[1
]}

Gellermann, W ^{[1
]}

Vardeny, ZV ^{[1
]}

Ozaki, M ^{[1
]}

Yoshino, K ^{[1
]}

机构：

[1] OSAKA UNIV,DEPT ELECT ENGN,OSAKA 565,JAPAN

来源：

SYNTHETIC METALS | 1997年 / 84卷 / 1-3期

关键词：

stimulated emission; photoluminescence; time-resolved ultrafast spectroscopy; excitons; polaron pairs; poly(phenylene vinylene) derivatives;

D O I：

10.1016/S0379-6779(97)80836-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of picosecond(ps) time-resolved photo-modulation(PM) spectroscopy of DOOPPV in solution, pristine, photooxidized and C-60-doped DOOPPV films, and thin films of P3BT. We find that the photophysics of pristine luminescent polymers is determined by excitons, which in the singlet manifold are characterized by a PM spectrum consisting of two photoinduced absorption(PA) bands and a stimulated emission band. Excitons in the triplet manifold, on the contrary can be identified by a PM spectrum consisting of a single PA band. After photo-oxidation or doping, a new type of photo-excitations is produced-intrachain polaron pairs, characterized by a broad PA band and much slower recombination dynamics compared to that of sin let excitons.

引用

页码：493 / 496

页数：4

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