A study on fluorescence properties of Eu3+ ions in alkali lead tellurofluoroborate glasses

作者：Saleem S A; Jamalaiah B C; Babu A Mohan; Pavani K; Moorthy L Rama^*

来源：Journal of Rare Earths, 2010, 28(2): 189-193.

DOI：10.1016/S1002-0721(09)60078-8

• europium
• glasses
• Judd-Ofelt analysis
• fluorescence
• emission cross-sections
• optical gain parameters
• rare earths

Glasses with chemical composition of (in mol.%): 26 RF-20 PbO-10 TeO2-43 H3BO3-1 EuO3 (RLTB) were prepared by conventional melt quenching method. The Judd-Ofelt intensity parameters Omega(2) and Omega(6) were obtained from the absorption intensities of F-7(0)-> D-5(2) and F-7(0)-> L-5(6) transitions, respectively. In order to overcome the problem of applicability of Judd-Ofelt analysis at room temperature due to the overlapping of the transitions originating from F-7(0) and F-7(1) levels of Eu3+ ion, the effect of the thermalization on the population of energy levels was taken into account. The photoluminescence spectra contained five emission bands originating from the D-5(0) metastable state to F-7(J)(J=0, 1, 2, 3, 4) lower lying states. The decay profiles were found to be single exponential in all the three glasses. The measured lifetimes (tau(mes)) were in good agreement with the calculated lifetimes (tau(cal)) obtained by using the thermally corrected Judd-Ofelt intensity parameters.

• 出版日期2010-4