Temperature Dependent and Optical Properties of Bi-Based Ge-Se Glasses

Thermal diffusivity and optical band gap measurements on Bi doped germanium chalcogenides exhibit significant changes across the p→ n transition as a function of composition. The carrier type reversal,(CTR) which is purely an electronic property, should not,in principle, get manifested in thermal transport properties. The threshold maximum in thermal diffusivity which occur around 7 at. % of Bi content in Ge2oBixSe8o-x glasses is reported. Key Words : Chalcogenide, Quenching Technique, Thermal Diffusivity