Effect of silver dissolution on electrical properties of As2S3

The paper reports the effect of dissolution of silver into the chalcogenide As2S3. The conductivity of As2S3 decreases with doping at lower temperatur es. The a.c. conductivity is proportional to omega (s) for undoped as well as doped samples. The value of the frequency exponent "s" increases with do ping. On the other hand, the dielectric constant of As2S3 also increases wi th doping and the effect is quite prominent at higher temperatures. A new s tructural model together with the correlated barrier hopping model has been used to explain these results. (C) 2001 Kluwer Academic Publishers.