Abstract
This paper reports the invariance of the Meyer-Neldel Rule for thermally activated d. c. conduction under the aging effects in glassy Se (g-Se) and As2Se3 glass. For this purpose, we have analyzed the electrical data of the samples (i.e. glassy Se and As2Se3 glass) in bulk form. The fresh samples of both materials were prepared by the well-known melt-quench technique. Particularly, we have done current-voltage (I–V) measurements at different temperatures. Using the I–V characteristics, we calculated d. c. conductivity and the activation energy involved in d. c. conduction for both fresh as well as aged samples. Finally, we observed that the Meyer-Neldel rule holds and Meyer-Neldel characteristic energy are almost the same in both fresh and aged samples of g-Se as well as As2Se3 glass. This indicates that there is no time-dependent variation in the Meyer-Neldel parameter in the present chalcogenide glasses.
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•Observed unique universality of MNCR before and after physical aging.•D. c. Conduction activation energy is changed significantly as a signature of aging.•MN activation energy remains almost unaffected for fresh and aged samples.