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Abstract
Optical and crystalline structure properties of Ga2Se3 crystals were analyzed utilizing ellipsometry and x-ray diffraction (XRD) experiments, respectively. Components of the complex dielectric function (ε = ε1 + iε2) and refractive index (N = n + ik) of Ga2Se3 crystals were spectrally plotted from ellipsometric measurements conducted from 1.2 eV to 6.2 eV at 300 K. From the analyses of second-energy derivatives of ε1 and ε2, interband transition energies (critical points) were determined. Absorption coefficient–photon energy dependency allowed us to achieve a band gap energy of 2.02 eV. Wemple and DiDomenico single effective oscillator and Spitzer–Fan models were accomplished and various optical parameters of the crystal were reported in the present work.
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; Isik, M 2 ; Gasanly, N M 3 ; Gasanova, L G 4 ; Babayeva, R F 5 1 Physics, Inter-Curricular Courses Department, Çankaya University, Ankara, Turkey
2 Department of Electrical and Electronics Engineering, Atilim University, Ankara, Turkey
3 Department of Physics, Middle East Technical University, Ankara, Turkey
4 Department of Physics, Baku State University, Baku, Azerbaijan
5 Department of Physics and Chemistry, Azerbaijan State University of Economics, Baku, Azerbaijan