Ellipsometric and Spectrometric Studies of (Ga0.2In0.8)2Se3 Thin Film

  • I. P. Studenyak Uzhhorod National University
  • M. Kranjčec University North
  • V. Yu. Izai Uzhhorod National University
  • V. I. Studenyak Uzhhorod National University
  • M. M. Pop Uzhhorod National University
  • L. M. Suslikov Uzhhorod National University
Keywords: thin film, spectral ellipsometry, transmission spectra, refractive index, energy pseudogap, Urbach energy


Thermal evaporation technique is used to deposite (Ga0,2In0,8)2Se3 thin films. The refractive index and extinction coefficient dispersions are obtained from the spectral ellipsometry measurements. The dispersion of the refractive index is described in the framework of the Wemple–Di Domenico model. The optical transmission spectra of a (Ga0,2In0,8)2Se3 thin film are studied in the temperature range 77–300 K. The temperature behavior of the Urbach absorption edge, as well as the temperature dependences of the energy pseudogap and Urbach energy, are investigated. The influence of different types of disordering on the optical absorption edge of a (Ga0,2In0,8)2Se3 thin film is discussed. Optical parameters of a (Ga0,2In0,8)2Sethin film and a single crystal are compared.


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How to Cite
Studenyak, I., Kranjčec, M., Izai, V., Studenyak, V., Pop, M., & Suslikov, L. (2020). Ellipsometric and Spectrometric Studies of (Ga0.2In0.8)2Se3 Thin Film. Ukrainian Journal of Physics, 65(3), 231. https://doi.org/10.15407/ujpe65.3.231
Semiconductors and dielectrics

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