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

TitleSinglet exciton diffusion in MEH-PPV films studied by exciton-exciton annihilation
Publication TypeJournal Article
Year of Publication2006
AuthorsLewis, A. J., Ruseckas A., Gaudin O. P. M., Webster G. R., Burn P. L., and Samuel I. D. W.
JournalOrganic Electronics
Volume7
Issue6
Pagination452–456
Date Publisheddec
AbstractWe 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.
DOI10.1016/j.orgel.2006.05.009