Abstract
The electronic properties of CdGa2S4 single crystals have been studied experimentally using spectral ellipsometry and theoretically from first principles using density functional theory (DFT). Using ellipsometric studies in the energy range of 0.7-6.5 eV, the imaginary and real parts of the dielectric function along and perpendicular to the optical axis, the dispersion of the refractive, extinction, and absorption coefficients are determined. The width of the direct band gap is estimated. The band structure, the origin of the energy states, the optical functions, and the partial densities of states (PDOS) projected onto the atoms are determined by ab initio calculations. The theoretically calculated results are compared with the experimental data of the present work obtained by the method of spectral ellipsometry and with the experimental results available in the literature. Keywords: spectral ellipsometry, ellipsometric angles, dielectric function, refractive index, extinction coefficient, Brillouin zone, band structure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have