Field-induced delayed photoluminescence in a conjugated polymer

被引：58

作者：

Schweitzer, B

Arkhipov, VI

Bässler, H

机构：

[1] Katholieke Univ Leuven, Lab Halfgeleiderfys, B-3001 Heverlee, Belgium

[2] Univ Marburg, Inst Phys Kern & Makromol Chem & Wissensch, Zentrum Mat Wissensch, D-35032 Marburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 304卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(99)00260-2

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：

Field-assisted delayed fluorescence is observed in photoexcited ladder-type poly-(para-phenylene) samples which exceeds the lifetime of primary optical excitations. The effect is explained by field-assisted dissociation of on-chain excitons into short metastable off-chain geminate pairs of charge carriers, Some of the surviving geminate pairs can recombine again into on-chain singlet excitations after turning off the external electric field. This gives rise to a spike of the field-delayed photoluminescence with the spectrum identical to that of prompt fluorescence. (C) 1999 Elsevier Science B.V. All rights reserved.

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页码：365 / 370

页数：6

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