Luminescence of, and energytransfer between Dy³⁺ and Tb³⁺ in NASICON-type phosphate glasses

Abstract

Fluorescence of Dy³⁺ and Tb³⁺ and the energy transfer between them in Na₅TiP₃O₁₂ and Na₄NbP₃O₁₂ glasses have been studied. Concentration quenching of fluorescence occurs in the case of Dy³⁺ at concentrations above 3 weight %, whereas in the case of Tb³⁺, it does not occur up to 5 weight %. The energy transfer from Dy³⁺ to Tb³⁺ is nonradiative and takes place through dipole-dipole interaction.