x≤ 7) films by using X-ray diffraction and optical spectroscopic techniques. The as-prepared
samples were found to be amorphous by X-ray diffraction while the crystallization of Se,
In2Se3 and Bi2Se3 phases has been observed upon annealing the films at 440 K. The
enhancement in the main diffraction peak intensity was accepted as the increase in the
crystalline character for the devitrified films with Bi content. The addition of 5 at.% of Bi …