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

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

Research output: Contribution to journalArticlepeer-review

139 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)452-456
Number of pages5
JournalOrganic Electronics
Volume7
DOIs
Publication statusPublished - Dec 2006

Keywords

  • exciton
  • diffusion
  • solar cell
  • photovoltaic
  • photophysics
  • MEH-PPV
  • CONJUGATED POLYMER
  • PHOTOVOLTAIC CELLS
  • ENERGY-TRANSFER
  • BINDING-ENERGY
  • SOLAR-CELLS
  • HETEROJUNCTION
  • DISSOCIATION
  • POLY(P-PHENYLENEVINYLENE)
  • HETEROSTRUCTURE
  • EMISSION

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