Modelling exciton diffusion in disordered conjugated polymers

被引：6

作者：

Athanasopoulos, S. ^{[1
]}

Emelianova, E. V. ^{[1
]}

Walker, A. B. ^{[2
]}

Beljonne, D. ^{[1
]}

机构：

[1] Univ Mons, Lab Chem Novel Mat, Pl Parc 20, B-7000 Mons, Belgium

[2] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

来源：

ORGANIC PHOTONICS IV | 2010年 / 7722卷

关键词：

Exciton diffusion; conjugated polymers; energetic disorder; Monte Carlo simulations; quantum-chemical calculations; analytical model; ENERGY-TRANSFER; SPECTROSCOPY; MIGRATION; TRANSPORT;

D O I：

10.1117/12.854434

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：

We present a combined quantum-chemical and Monte Carlo approach for calculating exciton transport properties in disordered organic materials starting from the molecular scale. We show that traps and energetic disorder are the main limitations for exciton diffusion in conjugated polymers. An analytical model for exciton hopping in a medium of sites with uncorellated energetic disorder gives a quantitative description on the dependence of the diffusion length to both the energetic disorder strength and temperature. We demonstrate how traps and energetic disorder can pin down the diffusion length in conjugated polymers to values below 10 nm.

引用

页数：8

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