Ibn Al-Haitham Journal for Pure and Applied Sciences (Aug 2017)

Study of Optical Properties of CdS Films Prepared by Thermal Evaporation in Vacuum

  • H.F. Elawi,
  • B.D. Balwa,
  • H.F. Ali

Journal volume & issue
Vol. 22, no. 4


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CdS films were prepared by thermal evaporation at pressure (10-6torr) of 1μm thickness onto glass substrate by using (Mo) boat. The optical properties of CdS films, absorbance, transmittance and reflectance were studied in wavelength range of (300-900)nm. The refractive index, extinction coefficient, and absorption coefficient were also studied. It's found that CdS films have allowed direct and forbidden transition with energy gap 2.4eV and 2.25eV respectively and it also has high absorption coefficient (α >104cm-1).