Dispersive triplet excitation transport in organic glasses

R. Richert, H. Bässler

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

Abstract

Time dependent transport of triplet excitations in amorphous benzophenone, anthraquinone, and phenanthrene has been investigated in the temperature range 4.2 K<T< 100 K by monitoring diffusion-controlled decay of the inhomogeneously broadened 0-0 phosphorescence band of bulk states. The results are in excellent agreement with both the analytic theory of Grünewald et al. and computer simulation of nonequilibrium transport. They indicate the applicability of a stochastic transport model based on asymmetric hopping rates with unrestricted energy relaxation. The time dependence of the ensemble averaged hopping frequency has been determined within three decades of time. It can be approximated by a ν(t)∼(t/t0)a-1 law with time dependent dispersion parameter a.

Original languageEnglish (US)
Pages (from-to)3567-3572
Number of pages6
JournalThe Journal of chemical physics
Volume84
Issue number6
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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