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Medientyp: E-Artikel Titel: Kinetics of photo‐darkening and self‐bleaching in amorphous As2S3 and As2Se3 thin films Beteiligte: Munzar, M.; Tichý, L. Erschienen: Wiley, 2007 Erschienen in: physica status solidi (RRL) – Rapid Research Letters Sprache: Englisch DOI: 10.1002/pssr.200600082 ISSN: 1862-6270; 1862-6254 Schlagwörter: Condensed Matter Physics ; General Materials Science Entstehung: Anmerkungen: Beschreibung: <jats:title>Abstract</jats:title><jats:p>The kinetics of photo‐darkening of amorphous As<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub> and a‐As<jats:sub>2</jats:sub>Se<jats:sub>3</jats:sub> thin films follows a single exponential, but the magnitude and the rate of the process is higher in case of As<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub>. The kinetics of self‐bleaching (dark relaxation) in advance photo‐darkened state follows a stretched exponential (SRE) with different stretching parameter for a‐As<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub> and a‐As<jats:sub>2</jats:sub>Se<jats:sub>3</jats:sub>. Within the J. C. Phillips approach we suppose that photo‐darkening in amorphous As<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub> films is, to some extent, accompanied by changes in short‐range order interactions, while photo‐darkening of amorphous As<jats:sub>2</jats:sub>Se<jats:sub>3</jats:sub> 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<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub> and As<jats:sub>2</jats:sub>Se<jats:sub>3</jats:sub> films, respectively. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>