Current Understanding of Photoinduced Volume and Bandgap Changes in Amorphous Chalcogenides
GIFU UNIV (JAPAN) DEPT OF ELECTRICAL AND ELECTRONIC ENGINEERING
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The terms photodarkening PD and photostructural changes PSC have been used equivalently in the study of photoinduced changes in amorphous chalcogenides. A recent observation, e.g. the rate of PVC is higher than that of PD under bandgap illumination, demonstrates that there is no one-to-one correlation between the two phenomena. Furthermore, recent results on the dynamics of PSC in-situ measurements have shed new light on our understanding of D and PVC and the current understanding should be modified. A review is given on these topics through the recently obtained interesting results on the reversible PD and PVC for As-based chalcogenides. We pay attention in particular to the time evolution of these changes in situ measurements etc.
- Ceramics, Refractories and Glass