December 13, 2019
Dariush Souri

Dariush Souri

Academic rank: Associate professor
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Education: Ph.D in فیزیک
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Faculty: science

Research

Title Study of Optical Absorption and Optical Band Gap Determination of Thin Amorphous TeO2-V2O5-MoO3 Blown Films
Type Article
Keywords
Optical absorption, Thin amorphous blown films, Optical band gap
Journal Indian Journal of Pure and Applied Physics
Researchers Dariush Souri

Abstract

The optical absorption coefficient of amorphous 40TeO2-(60-x) V2O5-xMoO3 thin films was determined in a spectral range 190-1100 nm at room temperature. The fundamental optical absorption edge was sharp. The optical gap generally increases as the proportion of MoO3 in the mixed films was increased; also, the width of the tail of the localized states in the band gap was determined for different compositions, which are arising from the lack of long range order and the results were discussed in terms of the usual density-of-state models of amorphous materials.