Optical studies of X-ray irradiated (Ga_0.4In_0.6)₂Se₃ films

Abstract

2Se3 films are irradiated using a wide-band radiation of Cu-anode X-ray tube during different exposure times. The spectral dependences of refractive index and extinction coefficient are measured with a spectral ellipsometric technique. The optical transmission spectra of X-ray irradiated (Ga0.4In0.6)2Se3 films are studied depending on the irradiation time. The parameters of Urbach absorption edge for those films are determined. The spectral dependences of refractive indices for both non-irradiated and irradiated (Ga0.4In0.6)2Se3 films are described in the framework of Wemple-DiDomenico model.

Optical Parameters of As-Deposited and Annealed (Ga0.3In0.7)2Se3 Thin Films

“…[10], the refractive index and extinction coefficient dispersions were measured by spectral ellipsometry, and the temperature behavior of the Urbach absorption edge and the temperature dependences of the optical parameters were stud- ied. The influence of X-ray irradiation on such optical parameters of (Ga 𝑥 In 1−𝑥 ) 2 Se 3 films as the energy pseudogap, Urbach energy, and refractive index have been investigated in [11,12].…”