Abstract
The mechanical characteristics of amorphous As2Se3:Sn prepared by thermal evaporation in vacuum on glass substrates heated to T substr = 100 °C are investigated. It was established that the hardness H of amorphous thin films is generally higher than the hardness of bulk samples of the same chemical composition. The combination of depth sensing indentation and band-gap illumination has been used to study the photoplastic effect in chalcogenide glasses and thin films. The prominent photoplastisity of thin films has been revealed through hardness deviations during nanoindentations under light illumination from those observed for the materials in the darkness. Some optical properties, the modification of optical parameters (optical band gap E g , absorption coefficient α, refractive index n) under light irradiation and heat treatment of the amorphous As2Se3:Snx thin films, and the relaxation of the photodarkening effect under light exposure were also investigated.
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