Abstract
Chalcogenide glasses have wide range of applications in Mid- IR region due to its attractive optical properties. In this paper, we study the influence of UV light on the optical properties of solution based A2S3 chalcogenide thin films by examining transmission spectraand further we compare optical properties of photo annealed solution based thin films with the optical properties of thermally deposited As2S3 thin film annealed at 150°C for one hour. Illumination removes the excess amount of solvent which results in high refractive index, lower absorption coefficient and optical band gap ranging from 2.32 eV to 2.27eV.
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