Abstract
Dy3 + -doped lead phosphate glasses were prepared by a melt quenching technique and investigated through Infrared absorption spectra (IR), photoluminescence (PL), and UV-Visible optical absorption measurements (UV-Vis). The luminescence spectra show two intense bands at 483 and 575 nm, which are attributed to 4F\(_{9/2}\to^{6}\)H15/2 (blue) and 4F\(_{9/2} \to ^{6}\)H13/2 (yellow) transitions, respectively. The optical spectra data was used to evaluate the values of indirect allowed transitions. It was found that the optical band gap increases with Dy2O3 content. Variation in optical gap energy with the variation in localized state tails, confirms the theories for localized states in the energy gap of amorphous semiconductors. The characteristic infrared absorption bands of these glasses due to the stretching and bending vibrations were identified and analyzed by the increasing of the Dy2O3 content. This fact allowed us to identify the specific structural units which appear in these glasses.
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MARZOUK, M.A., OUIS, M.A. & HAMDY, Y.M. Spectroscopic Studies and Luminescence Spectra of Dy2O3 Doped Lead Phosphate Glasses. Silicon 4, 221–227 (2012). https://doi.org/10.1007/s12633-012-9125-z
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DOI: https://doi.org/10.1007/s12633-012-9125-z