Journals / Turkish Journal of Physics / 2006 / Cilt: 30 - Sayı: 6
Influence of Thickness on Optical Properties of a: As2Se3 Thin Films
- Journal
- Turkish Journal of Physics
- Pages
- 519–528
- DOI
- —
Abstract
This paper reports optical properties of amorphous chalcogenide thin films of As2Se3 of different thicknesses 2000-6800 Å. The transmittance and reflectance of thin films were measured in the wavelength range 500-1000 nm. It was found that the optical band gap increases with film thickness. Variation of refractive index n and extinction coefficient k with thickness have been studied to analyze optical efficiency of the As2Se3 thin films. The dielectric behavior of the films has also been studied and high frequency dielectric constants \varepsilon\infty has been estimated as a function of thickness of films.
Özet
This paper reports optical properties of amorphous chalcogenide thin films of As2Se3 of different thicknesses 2000-6800 Å. The transmittance and reflectance of thin films were measured in the wavelength range 500-1000 nm. It was found that the optical band gap increases with film thickness. Variation of refractive index n and extinction coefficient k with thickness have been studied to analyze optical efficiency of the As2Se3 thin films. The dielectric behavior of the films has also been studied and high frequency dielectric constants \varepsilon\infty has been estimated as a function of thickness of films.