Kinetics of photo‐darkening and self‐bleaching in amorphous As 2 S 3  and As 2 Se 3  thin films | Zendy

Munzar M. | Zendy; Tichý L. | Zendy

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Kinetics of photo‐darkening and self‐bleaching in amorphous As 2 S 3 and As 2 Se 3 thin films

Author(s) -

Munzar M.,

Tichý L.

Publication year - 2007

Publication title -

physica status solidi (rrl) – rapid research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.786

H-Index - 68

eISSN - 1862-6270

pISSN - 1862-6254

DOI - 10.1002/pssr.200600082

Subject(s) - amorphous solid , kinetics , relaxation (psychology) , chemistry , materials science , analytical chemistry (journal) , physics , crystallography , organic chemistry , quantum mechanics , psychology , social psychology

The kinetics of photo‐darkening of amorphous As 2 S 3 and a‐As 2 Se 3 thin films follows a single exponential, but the magnitude and the rate of the process is higher in case of As 2 S 3 . The kinetics of self‐bleaching (dark relaxation) in advance photo‐darkened state follows a stretched exponential (SRE) with different stretching parameter for a‐As 2 S 3 and a‐As 2 Se 3 . Within the J. C. Phillips approach we suppose that photo‐darkening in amorphous As 2 S 3 films is, to some extent, accompanied by changes in short‐range order interactions, while photo‐darkening of amorphous As 2 Se 3 is accompanied rather by changes in Coulomb interactions. The self‐bleaching process reduced the magnitude of photo‐darkening up to 45% and 60% for amorphous As 2 S 3 and As 2 Se 3 films, respectively. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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