Abstract
Cadmium Sulphide (CdS) thin films with different thicknesses were prepared by pulsed laser deposition technique using Nd:YAG laser with wavelength 1064 nm. AC electrical conductivity was studied in the frequency range 100–1000 KHz as a function of temperature. AC conductivity increased with increasing the frequency. The values of the activation energy of the AC conduction were calculated for CdS thin films of different thicknesses at various frequencies. The dielectric constant and dielectric loss were investigated as a function of temperature at different frequencies.