Investigations of optical properties and judd-ofelt analysis of Eu3+ ions doped boro-phosphate glasses

Abstract

In the present work, Eu3+ ions doped boro-phosphate glasses (xEuBKP) were successfully prepared by melt quenching technique and their luminescence properties were investigated through recording optical absorption and photoluminescence spectral measurements. From the absorption spectral data, the optical band gap energy (Eopt) corresponding to the direct and indirect allowed transitions of the title glasses has been determined. The Judd-Ofelt (JO) intensity parameters Ωλ (λ=2, 4 and 6) were calculated from the emission spectra to analyse the symmetry of the ligand environment around Eu3+ ions and to examine the nature of the bond between Eu3+ ions and ligand oxygen in the prepared glasses. From the JO intensity parameters, radiative properties such as transition probability (A), stimulated emission cross section (σPE), radiative life time (τcal) and branching ratios (βR) of the studied glasses were determined and the suitability of the present Eu3+ doped boro-phosphate glasses for optoelectronic applications were discussed based on the obtained results.