Current Understanding of Photoinduced Volume and Bandgap Changes in Amorphous Chalcogenides

Abstract

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).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011501

Entities

People

  • A. Ganjoo
  • K. Shimakawa

Organizations

  • Gifu University

Tags

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Advanced Materials
  • Coefficients
  • Conductivity
  • Covalent Bonds
  • Energy
  • Energy Bands
  • Films
  • Glass Transition Temperature
  • Low Temperature
  • Materials
  • Measurement
  • Optical Absorption
  • Optical Materials
  • Photons
  • Transition Temperature
  • Valence Bond Theory

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