Raman scattering and spectroscopic ellipsometry studies of Sb2S3 and Sb2Se3 bulk polycrystals

The optical properties of Sb 2 Se 3 and Sb 2 S 3 polycrystals from 1.0 to 4.6 eV were analyzed. The multi-oscillator Tauc–Lorentz model allowed complex dielectric functions to be parametrized and the optical dielectric functions of the samples were evaluated.