Quantitative UV-VIS spectroscopic studies of photo-thermo-refractive glasses. II. Manifestations of Ce3Â + and Ce(IV) valence states in the UV absorption spectrum of cerium-doped photo-thermo-refractive matrix glasses

► UV absorption spectra of cerium- and antimony-doped photo-thermo-refractive glasses. ► Deconvolution of Ce3 +- and Ce(IV)-related UV spectral components in PTR glasses. ► Obeying the Beer Law for the Ce3 +- and Ce(IV)-related UV absorption bands. ► Antimony as a reducer with respect to the Ce(IV) valence state in PTR glasses. ► Total molar absorptivities and relative molar fractions of Ce3 + and Ce(IV) species.