Dielectric Characterization of ZnO: TiO2 Nanocomposites

Abstract

We have carried out the electronic and optical properties of ZnO doped TiO2 nanocomposite thin films produced by sol-gel technique. The real and imaginary parts of the dielectric function display the same characteristics in each dielectric spectra pattern. However, the values of the real part are higher than that of the imaginary part. The variation of the dielectric constants with the photon energy points out that there are some interactions between photons and electrons in the undoped and ZnO doped TiO2 thin films. The spectral distribution of n and k wavelength for the TiO2 thin films with ZnO doping are calculated. The obtained values of both n and k show that these parameters are depending on ZnO doping concentration.