Effect of tin additive in cadmium sulfide thin films on ac mechanism and Cole-Cole diagram

Abstract EN

Thin Films of pure and Sn doped CdS have been prepared via thermal evaporation method onto glass substrates at room temperature at 600 ± 10 nm film thickness.

Real and imaginary ( ) part of dielectric constant, ac conductivity (σac) and cole - cole diagram of thin films for Sn ratios (0 %, 10 %, 25 & , and 30 %) have been studied at room temperature as a function of frequency range (20 kHz - 4 MHz).

The results indicated that the dielectric constant increases with the increase of Sn concentration but it decreases with the increase of frequency.

The mechanism of ac conductivity matches with correlated barrier hoping model.

From cole-cole diagram, the polarization and the relaxation time increase with the increase of concentration.