Study of electrical properties of glassy Se100- xTexalloys

N. Mehta, A. Dwivedi, R. Arora, S. Kumar, A. Kumar
2005 Bulletin of Materials Science  
Temperature and frequency dependence of a.c. conductivity have been studied in glassy Se 100-x Te x (x = 10, 20 and 30) over different range of temperatures and frequencies. An agreement between experimental and theoretical results suggests that the a.c. conductivity behaviour of selenium-tellurium system (Se 100-x Te x ) can be successfully explained by correlated barrier hopping (CBH) model. The density of defect states has been determined using this model for all the glassy alloys. The
more » ... y alloys. The results show that bipolaron hopping dominates over single-polaron hopping in this glassy system. This is explained in terms of lower values of the maximum barrier height for single-polaron hopping. The values of density of charged defect states increase with increase in Te concentration. This is in agreement with our previous results obtained from SCLC measurements.
doi:10.1007/bf02706345 fatcat:u6dstznbgnhcbgbmh65xionbie