The study of photo- and thermally-induced diffusion and dissolution of Ag in As30S70 amorphous films and its reaction products

Kinetics of photo- and thermally-induced diffusion and dissolution (PIDD and TIDD) of silver in a-As30S70 films were measured by monitoring the change in thickness of the undoped chalcogenide using a modified computer-controlled reflectivity technique. Silver-concentration profiles during photo- and thermally-induced solid-state reactions were traced by means of Rutherford backscattering spectroscopy (RBS). The enthalpy of photo- and thermally-induced reactions was measured by means of differential photocalorimetry and quasi-isothermal temperature-modulated differential scanning calorimetry (DSC), which are shown to be connected with the chemical reaction: Ag+As3S7=AgAsS2+As2S5.