Abstract
(Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> films were deposited by the thermal evaporation technique. As-deposited (Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> films were irradiated using wideband radiation of Cu-anode X-ray tube at different exposure times. The spectral dependences of refractive index and extinction coefficient were measured by the spectral ellipsometry technique. The optical transmission spectra of X-ray irradiated (Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> films were studied depending on irradiation time. Parameters of Urbach absorption edge for X-ray irradiated (Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> thin films were determined and compared with nonirradiated film. The spectral dependences of refractive indices of non-irradiated and X-ray irradiated (Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> films are described in the framework of Wemple and DiDomenico model. TThe variation of the parameters of Wemple and DiDomenico model for non-irradiated and X-ray irradiated (Ga<sub>0.3</sub>In<sub>0.7</sub>)<sub>2</sub>Se<sub>3</sub> films was discussed.
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