A study on fluorescence properties of Eu3+ ions in alkali lead tellurofluoroborate glasses
来源期刊：Journal of Rare Earths2010年第2期
论文作者：S.A.Saleem A.Mohan Babu K.Pavani L.Rama Moorthy
文章页码：189 - 193
摘 要：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 Ω2 and Ω6 were obtained from the absorption intensities of 7F0→5D2 and 7F0→5L6 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 7F0 and 7F1 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 5D0 metastable state to 7FJ （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 （τmes） were in good agreement with the calculated lifetimes （τcal） obtained by using the thermally corrected Judd-Ofelt intensity parameters.
S.A.Saleem1，A.Mohan Babu1，K.Pavani1，L.Rama Moorthy1
1. Department of Physics,Sri Venkateswara University
摘 要：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 Ω2 and Ω6 were obtained from the absorption intensities of 7F0→5D2 and 7F0→5L6 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 7F0 and 7F1 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 5D0 metastable state to 7FJ （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 （τmes） were in good agreement with the calculated lifetimes （τcal） obtained by using the thermally corrected Judd-Ofelt intensity parameters.
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