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Percolative growth of photodarkening in amorphous As2S3 films

Ganjoo, A, Shimakawa, K, Kamiya, H, Davis, EA and Singh, J (2000). Percolative growth of photodarkening in amorphous As2S3 films. Physical Review B (Condensed Matter and Materials Physics),62(22):14601-14604.

Document type: Journal Article
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Title Percolative growth of photodarkening in amorphous As2S3 films
Author Ganjoo, A
Shimakawa, K
Kamiya, H
Davis, EA
Singh, J
Journal Name Physical Review B (Condensed Matter and Materials Physics)
Publication Date 2000
Volume Number 62
Issue Number 22
ISSN 0163-1829   (check CDU catalogue open catalogue search in new window)
Start Page 14601
End Page 14604
Total Pages 4
Place of Publication New York, USA
Publisher The American Physical Society
HERDC Category C1 - Journal Article (DEST)
Abstract The time evolution of changes in the optical absorption coefficient with illumination has been studied for a-As2S3 films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatures. A model of photon-assisted site switching is proposed for the Variation of photodarkening with time, in which the fractional growth in the concentration of photodarkened sites is expressed by a stretched exponential function.
Keywords photostructural changes
photoexpansion
chalcogenides
model
DOI http://dx.doi.org/10.1103/PhysRevB.62.R14601   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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