Diffusion and drift of charge carriers in a random potential: Deviation from Einsteins law

R. Richert, L. Pautmeier, H. Bässler

Research output: Contribution to journalArticle

118 Scopus citations

Abstract

Employing Monte Carlo techniques, the diffusion and drift of charge carriers within an array of hopping states subject to a Gaussian distribution of site energies of width has been studied as a function of kT and electric field. With increasing disorder and field, significant deviations from Einsteins law are noted. They are shown to be the consequence of anomalous, field-assisted diffusion while the mobility remains constant. The effect can account for anomalous transit-time dispersion observed in polymeric photoconductors exhibiting time independent transport.

Original languageEnglish (US)
Pages (from-to)547-550
Number of pages4
JournalPhysical Review Letters
Volume63
Issue number5
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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