Influence of modifier oxide on emission features of Dy3+ ion in Pb3O4 ‒ZnO‒P2O5 glasses

Abstract Glasses of the composition Pb 2 O 3 ‒ZnO‒P 2 O 5 : Dy 3+ mixed with three different modifier oxides viz ., MgO, CaO and SrO are prepared. The influence of modifier oxide on the luminescence characteristics of Dy 3+ ions has been investigated. Using the intensities of various absorption bands of Dy 3+ ions, the Judd-Ofelt parameters Ω 2 , Ω 4 and Ω 6 have been evaluated. Together with the J‒O parameters and the luminescence spectra, various radiative properties like transition probability A , branching ratio β r , the radiative life time τ r , and the emission cross-section σ E for various emission levels of Dy 3+ ions have been evaluated and reported. The values of these parameters were found to be influenced by modifier oxides. Among the three modifier oxides mixed glasses, the glasses mixed with CaO mixed glasses exhibited the highest luminescence efficiency. The results have been analyzed in the light of structural modifications taking place in the glass network with the help of IR spectral studies.