Optical parameters of MgxZn1−xO thin films prepared by using the sol-gel method
2012
Mg x Zn1−x O thin films with different Mg contents were prepared by using the sol-gel spin-coating method. Optical parameters, such as the optical band gap, the absorption coefficient, the Urbach energy, the refractive index, the dispersion parameter, and the optical conductivity, were studied in order to investigate the effects of Mg content on the optical properties of Mg x Zn1−x O thin films. The optical band gap and the Urbach energy increased with increasing Mg content. The dispersion energy, the single-oscillator energy, the average oscillator wavelength, the average oscillator strength, and the refractive index at infinite wavelength of the Mg x Zn1−x O thin films were affected by the incorporation. Also, the optical conductivity of the Mg x Zn1−x O thin films increased with increasing photon energy.
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