AC Measurements on Silver Photodoping into Ge30S70 Glass

The process of photodoping of Ag into Ge30S70 glass was studied with ac measurements at room temperature in vacuo. It was suggested that the dominant charge carriers in the photodoped phase were silver ions and that, although their distribution was steplike, as already reported, it was not so abrupt at the step front. The photodoping process was explained in terms of ionic conduction caused by photoenhanced internal electric field.