Singlet exciton diffusion in MEH-PPV films studied by exciton-exciton annihilation

被引：162

作者：

Lewis, A. J.

Ruseckas, A.

Gaudin, O. P. M.

Webster, G. R.

Burn, P. L.

Samuel, I. D. W. ^{[1
]}

机构：

[1] Univ St Andrews, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland

[2] Univ St Andrews, Ultrafast Photon Collaborat, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[3] Univ Oxford, Dept Chem, Chem Res Lab, Oxford OX1 3TA, England

来源：

ORGANIC ELECTRONICS | 2006年 / 7卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

exciton; diffusion; solar cell; photovoltaic; photophysics; MEH-PPV;

D O I：

10.1016/j.orgel.2006.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report time-resolved photoluminescence studies in MEH-PPV films for a wide range of excitation intensities. The results fit well to a diffusion-limited exciton-exciton annihilation model with an annihilation constant gamma = (2.8 +/- 0.5) x 10(-8) cm(3) s(-1). This enables us to estimate the exciton diffusion coefficient to be D = (3 +/- 1) x 10(-3) cm(2) s(-1). This corresponds to a diffusion length between 5 and 8 nm for one-dimensional diffusion. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：452 / 456

页数：5

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