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Glassy substrates Se 85 Te 15 thin films were thermally evaporated onto chemically cleaned glass. Optical absorption measurements were carried out on as-deposited and thermal annealed Se 85 Te 15 films. It was found that the mechanism of the optical absorption follows the rule of non-direct transition. The annealed Se 85 Te 1 ...
Transmittance measurements in the spectral range 300-900nm were used to study the optical properties of Ge 20 Sb x Se 80-x (where 5=<x=<20at.%) thin films. It was found that the mechanism of the optical absorption follows the rule of non-direct transition. The optical energy gap of the as-deposited films decreases monotonically with increasing antimony...
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