ELECTRICAL-PROPERTIES OF A-ANTIMONY SELENIDE

This paper reports conduction mechanism in a-Sb2Se3 over a wide range of temperature (238 to 338 K) and frequency (5 Hz to 100 kHz). The d.c . conductivity measured as a function of temperature shows semiconduct ing behaviour with activation energy Delta E = 0.42 eV Thermally induc ed changes in the electrical and dielectric properties of a-Sb2Se3 hav e been examined. The a.c. conductivity in the material has been explai ned using modified CBH model. The band conduction and single polaron h opping is dominant above room temperature. However, in the lower tempe rature range the bipolaron hopping dominates.