Optical Properties of Copper-Zinc Sulphide Network from Mixed Single Solid Source Precursors of Copper and Zinc Dithiocarbamates


  • Joseph Onyeka EMEGHA Department of Physics, University of Benin, Benin City, Edo State, Nigeria
  • Chukwudi Mcdonald OKAFOR Department of Physics Education, Federal College of Education (Technical) Asaba, Delta State, Nigeria
  • Kingsley Eghonghon UKHUREBOR Department of Physics, Edo State University Uzairue, Edo State, Nigeria




Dithiocarbamate, Precursors, Metal-organic chemical vapour deposition (MOCVD), Thin films, Fourier transforms infrared (FTIR), Spectrophotometer, Copper, Zinc


Thin films of copper-zinc sulphide (CxZn1-xS) have been deposited by metal-organic chemical vapour deposition (MOCVD) technique at 400 °C on soda-lime substrates. The films contained copper dithiocarbamate and zinc dithiocarbamate of various concentrations. The effect of the precursor’s concentration was investigated using Fourier transforms infrared (FTIR) spectroscopy and UV-Vis Spectrophotometer. The precursors’ FTIR spectrums have the characteristics of copper sulphide and zinc sulphide absorption bands below 800 cm-1. The optical properties for all the samples were studied by reading the absorbance and transmittance spectra in the range of 300 - 900 nm. The results indicate direct bandgap energy that ranged between 2.20 to 3.42 eV. The films were found to have a very high transmittance in the visible and near-infrared regions and an average reflectance of about 0.14 in the same regions. Optical constants like refractive index, extinction coefficient, and optical conductivity were estimated as a function of photon energy. The various properties exhibited by the films indicate that the films can find application in various optoelectronic devices.


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How to Cite

EMEGHA, J. O. ., OKAFOR, C. M. ., & UKHUREBOR, K. E. . (2021). Optical Properties of Copper-Zinc Sulphide Network from Mixed Single Solid Source Precursors of Copper and Zinc Dithiocarbamates . Walailak Journal of Science and Technology (WJST), 18(9), Article 9535 (11 pages). https://doi.org/10.48048/wjst.2021.9535