Spectral diffusion and dissociation of excitons in conjugated polymers

被引：0
|
作者：
Arkhipov, VI [1 ]
Heremans, P [1 ]
Emelianova, EV [1 ]
Baessler, H [1 ]
机构：
[1] IMEC, B-3001 Heverlee, Belgium
来源：
ORGANIC OPTOELECTRONICS AND PHOTONICS | 2004年 / 5464卷
关键词：
conjugated polymers; exciton diffusion; exciton dissociation; photoluminescence quenching;
D O I：
10.1117/12.546471
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A model of exciton quenching in disordered organic materials is formulated. The model considers the quenching as a diffusion-limited process with the diffusion rate being controlled by energetic relaxation of excitons within the inhomogeneously broadened excitonic density of states. The calculated dependence of the radiative exciton decay rate upon the trap density is used in order to fit experimental data on the trap-induced photoluminescence quenching in methyl-substituted planarized poly-para-phenylene and in alkoxy-substituted poly-phenylenevinylene.
引用
收藏
页码：245 / 251
页数：7
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