Annealing Effects on the Structural and Optical Parameters of Cu3In17Se80 Thin Films | ||
| Egyptian Journal of Solids | ||
| Article 6, Volume 33, Issue 2, December 2010, Pages 233-247 PDF (494.2 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejs.2010.148701 | ||
| Abstract | ||
| Cu3In17Se80 thin films were prepared by thermal evaporation technique on glass and quartz substrates. X-ray diffraction analysis for the as-deposited and annealed thin films at 423K and 473 K showed that they have amorphous structure nature. The optical constants (refractive index n and absorption index k ) of the as-deposited and annealed films for several samples of different thickness (from 11 nm to 61.4 nm) have been calculated from optical transmittance and reflectance data in the wavelength range 400-2500 nm. Analysis of the refractive index, n, yields high frequency dielectric constant of 8.24 for the as-deposited films which increases with annealing. The optical transitions from absorption coefficient (α) analysis are found to be allowed indirect for the as-deposited and annealed films, and the corresponding energy gap is 1.1 eV for the as-deposited films, which increases with increasing annealing temperature. | ||
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