Glasses based on TeO2 and Pb2+: preparation and characterization

Abstract Samples of heavy metal oxide glasses, (TeO2)60 · (PbCl2)40−x · (PbF2)x where x∈〈0;40〉, were prepared and characterized by absorption and photoluminescence spectroscopy. The role of F → Cl substitution on optical and luminescence properties has been investigated. Selected samples were doped by Er using metal, chloride and oxide precursors. Photoluminescence spectra have been measured over a wide temperature range (4–300 K) and the role of multi-phonon transitions in mediating the inner 4f–4f electronic transitions was confirmed.