Funct. Mater. 2026; 33 (2): 188-199.

Ag–As–Sb–S semiconductor glasses with an As to Sb ratio of 1:3 and silver content up to 8 % were prepared by high-temperature synthesis. As follows from XRD and micro-Raman measurements, the synthesized samples are amorphous (As₁₀Sb₃₀S₆₀ and Ag₂As₁₀Sb₄₀S₅₈) with about 50 nm Sb2S3 crystallites or completely amorphous (Ag4As10Sb40S56 and Ag₈As₁₀Sb₄0_S52). Raman spectra measured at an increased laser power density (40 kW/cm²) show the formation of crystallites of elemental Sb and Sb₂O₃ in the laser spot on the sample surface due to its heating by the tightly focused laser light and interaction with oxygen present in the ambient air or adsorbed on the surface. Spectral dependences of the refractive index and extinction coefficient of the Ag–As–Sb–S glasses were obtained from spectroscopic ellipsometry data, based on which the optical bandgap values were determined and other characteristic parameters of the Ag–As–Sb–S glasses were evaluated using the Wemple–DiDomenico model.