On the nature of irreversible photo and thermoinduced changes in evaporated a-AsxS1−x layers

Abstract

The photo- and thermally induced changes in the dissolution rate of a-AsxS1−x and Ag/AsxS1−x evaporated layers are followed at different temperatures and As contents (x). The activation energy for thermoinduced changes as dependent on x coincides with that of the kinematic viscosity suggesting a similar mechanism. The activation energies for photostimulated changes coincide with the activation energies of changes in the intensity of Raman spectra of AsS3 and S2AsAsS2. Comparison of the activation energies for photoinduced relaxation with the dissolution rate and the sensitivity as dependent on x shows that AsS3 structures are responsible for the photostructural changes. The photostructural changes in AsxS1−x are the rate determining factor during the photodoping with Ag.