Abstract
Amorphous thin films of Se 90In 10- x Sb x ( x = 0, 2, 4 and 6 at.%) have been prepared by vacuum evaporation technique. The dark and photo-conductivity measurements were carried out in all the thin films under study. Temperature dependence of conductivity in dark as well as in presence of light show that conduction is through a thermally activated process in both the cases. A discontinuity in various photoelectrical parameters is observed at 2 at.% of Sb concentration which could be correlated with average coordination number at this particular composition. The obtained results are explained on the basis of chemically ordered network model and the topological model.
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