Eur. Phys. J. B 58, 251-256 (2007)
https://doi.org/10.1140/epjb/e2007-00227-y

Single-oscillator model and determination of optical constants of spray pyrolyzed amorphous SnO₂ thin films

Anadolu University, Faculty of Science, Department of Physics, 26470 Eskisehir, Turkey

Corresponding author: ^a yasemincaglar@anadolu.edu.tr

Received: 21 December 2006
Revised: 10 July 2007
Published online: 8 September 2007

Abstract

Amorphous SnO₂ thin films have been deposited using different spraying times via the spray pyrolysis method. The structure of the films was analyzed by X-ray diffraction and the results obtained showed that the structure of the films was almost non-crystalline. The optical properties of these thin films have been investigated by means of optical transmittance and reflectance spectra. The dispersion of the refractive index is discussed in terms of the Wemple–DiDomenico single oscillator model. The optical band gap E_g, the width of band tails of localized states into the gap E_U; the single oscillator energy E_o, the dispersion energy E_d and the optical constants such as refractive index, extinction coefficient, dielectric constant and optical conductivity were estimated.