INVESTIGATION OF OPTICAL ABSORPTION IN Te5(InxSe100-x)95GLASSY ALLOYS

摘要

An account of optical absorption measurements made on thin films of Te5(InxSe100-x)95glassy alloys (10≤x≤25) prepared by vacuum evaporation is presented. These measurements are made on the as-prepared and annealed samples. It is observed that annealing affects the optical properties and causes a reduction in the energy range of tail states and an increase in the optical energy gap in all the alloys. The mechanism of optical absorption follows the rule of non-direct transitions. The results obtained for different samples are compared with each other