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

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2006 Australia English Publisher:Elsevier BVJournal:Organic Electronics, volume 7, pages 452-456 (issn: 1566-1199,

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Authors: Lewis, A. J.; Ruseckas, A.; Gaudin, O. P. M.; Webster, G. R.; Burn, P. L.; Samuel, I. D. W.;

doi: 10.1016/j.orgel.2006.05.009

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

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Abstract

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.

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Australia

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Keywords

Materials Science, Photovoltaic Cells, Materials Science, Multidisciplinary, MEH-PPV, Physics, Applied, Energy-transfer, photovoltaic, Emission, photophysics, exciton, Binding-energy, Multidisciplinary, Solar-cells, Physics, diffusion, solar cell, Applied, Heterostructure, Heterojunction, Poly(p-phenylenevinylene), Conjugated Polymer, Dissociation

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