The decay of photoconductivity in amorphous As2Se3 following repetitive-pulse excitation

D. Wolverson, R. T. Phillips

Research output: Contribution to journalArticlepeer-review


Experimental results are presented for the decay of photoconductivity in amorphous As2Se3 following single-pulse, repetitive-pulse and steady-state illumination, at various temperatures. The observed decays are compared with calculations using a discretized density of band-tail states decaying exponentially into the band gap. The connection between the decays after repetitive-pulse and steady-state illumination is described. It is shown that agreement between calculation and experiment requires a band tail which extends deep into the band gap, and that the presence of a deep band tail can be inferred from measurements made on relatively short time scales.

Original languageEnglish
Pages (from-to)635-647
Number of pages13
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Issue number5
Publication statusPublished - May 1988

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)


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