Morphological and optical properties of Mg1-xCdSx nanostructured thin films

Transparent and highly conductive magnesium oxide doped by Cadmium sulphide has been deposited on glass substrates at 400°C by spray pyrolysis technique. UV–visible and atomic force microscopy were used to investigate the optical properties and surface morphology of Mg1-xCdSx nanostructured thin films. The transmittance, reflection, refractive index, extinction coefficient, and real & imaginary part of dielectric constant of Mg1-xCdSx thin films were also investigated in the wavelength range (300 -1100 nm).according to the (UV-Vis) measurements, the films have a high transmittance nearly 90 %, The transition type was direct and with increasing CdS doping ratio, the band gap of the Mg1-xCdSx films decreased from 3.175 eV to 2.204 eV. The particles size for pure MgO showed a decrease from 10.70 nm to 6.076 nm on doping, whereas the average of roughness and RMS decreasing with the increase in the doping ratio.