Effect of Heat Treatment on the ac Conductivity and Dielectric Properties of Ag₃₃Sb₃₁Se₃₆Thin Films

Abstract

The effect of heat treatment on the ac conductivity and dielectric properties of the melt quenched and thermally evaporated Ag 33 Sb 31 Se 36 chalcogenide system are reported for the first time. The results of the alternating current conductivity σ ac , the dielectric constant ε 1 , and the dielectric loss ε 2 of the Ag 33 Sb 31 Se 36 thin film samples are presented over the temperature range 303-373 K and the frequency range 0.1-100 kHz. The temperature dependence of the ac conductivity σ ac (ω) and the frequency exponent s are discussed with the aim of the correlated barrier hopping model. Values of σ ac (ω), ε 1 , and ε 2 were found to increase with the increase in the annealing temperature due to the reduction of the number of unsaturated defects which decrease the density of localized states in the band structure.

Exploration on nano-composite fumed silica-based composite polymer electrolytes with doping of ionic liquid

“…The dielectric polarization results from molecular dipoles would remain frozen at lower temperature, whereas it could attain rotational freedom at higher temperature when the effect of the molecular interaction energy becomes weaker than that of the thermal energy. Therefore, the dielectric constants increase with temperature [39]. From Fig.…”