Studying the Optical Properties of CdS Thin Films Prepared by Thermal Vacuum Evaporation Technique with a Different Thickness | ||
| Journal of University of Anbar for Pure Science | ||
| Article 18, Volume 6, Issue 1, April 2012, Pages 57-60 PDF (465.51 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.37652/juaps.2012.63151 | ||
| Author | ||
| Mahir N. Thomail* | ||
| University of Anbar-College of Education for Pure Science. | ||
| Abstract | ||
| CdS thin films with a different thickness have been prepared on glass substrates by using the thermal vacuum evaporation technique at substrate temperature of 150oC. The optical characteristics of the prepared thin films have been investigated by UV-VIS spectrophotometer in the wavelength range (300-1100 nm) . The films have a direct allow electronic transitions and the optical absorption are shifted to the low energies by increasing the thickness . Also the optical energy gap (Eg) has decreased from 2.47 eV to 2.22 eV by increasing the thickness value. The extinction coefficient (k) , refractive index (n) and the real and imaginary dielectric constants (ε1 , ε2 ) are investigated. All of these constants increased with the increases in thickness and shifted to the low energies | ||
| Keywords | ||
| Vacuum evaporation; cadmium sulfide; Optical properties; Thin films | ||
| References | ||
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