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Effects of Cu-Doping on Optical Properties of NiO

Jandow N. N.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 48

155--162

This work presents the effect of Cu-doping on some optical properties of Cu:NiO thin film prepared by spray pyrolysis technique. UV-Visible spectrophotometer in the range 380-900 nm used to determine the absorbance spectra for various Cu-doping of Cu:NiO thin film. The transmittance and energy gap are decreased with increasing Cu-doping in the prepared films, while absorption coefficient, extinction coefficient, and skin depth are increased with increasing Cu-doping.

Optical and Dispersion parameters of ZnS Thin Films Prepared by Flash Evaporation Method

Bakr N. A., Jandow N. N., Habubi N. F.

International Letters of Chemistry, Physics and Astronomy

2014

Vol. 20, iss. 1

52--63

Zns thin films are obtained by flash evaporation method onto preheated glass substrates. The transmittance analysis allowed the determination of refractive index and thickness using envelope method. It was found that the refractive dispersion data obeyed the single oscillator model. The calculated value of the refractive index (n0 ) was found to be equal to 2.27, which is in a good agreement with the value obtained from Cauchy’s fitting. Also the value of the optical energy gap, extinction coefficient, real and imaginary parts of the dielectric constant and optical conductivity have been measured.