Reversible vs irreversible photodarkening in a-Se: The kinetics study

A. Reznik, S. D. Baranovskii, M. Klebanov, V. Lyubin, O. Rubel, J. A. Rowlands

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Abstract

The kinetics of photodarkening (PD) in amorphous selenium has been studied experimentally at different intensities of optical excitation. Comparison between the experimental results and a proposed phenomenological model reveals the characteristic rates for conversion of structural units into reversible and irreversible states. Our results show that the relaxation of the irreversible PD states occurs over a barrier of about 0.9 eV and is described by much longer characteristic times (more that one order of magnitude) than that for the reversible states.

Original languageEnglish
Pages (from-to)S111-S115
JournalJournal of Materials Science: Materials in Electronics
Volume20
Issue numberSUPPL. 1
DOIs
StatePublished - 1 Jan 2009

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