Luminescence quenching by OH groups in highly Er-doped phosphate glasses

Y.C. Yan, A.J. Faber, H. Waal, de

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Highly (up to 4 mol% Er2O3) Er-doped phosphate bulk glasses have been prepd. by common glass-melting techniques. Afterwards, a heat treatment was performed on the as-melted samples. The photoluminescence lifetime of Er ions for the 4I13/2-4I15/2 transition increases substantially, typically from 3 ms up to 7 ms for a sample doped with 2 mol% Er2O3, due to the heat treatment. The increase of the lifetime is ascribed to a decrease in concn. of hydroxyl groups incorporated in the glass, which is confirmed by IR absorption spectroscopic measurements. The photoluminescence peak intensity also increases because of drying by a factor of 3 to 7 depending on glass compn. Based on elec. dipole-dipole interaction theory, the luminescence concn. quenching mechanism by hydroxyl groups is modelled. The model predicts that more than half of the hydroxyl groups in the glass is coupled to Er ions. The influence of the glass structure and role of Al3+ on the Er3+ luminescence is studied by IR spectroscopy. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)283-290
JournalJournal of Non-Crystalline Solids
Issue number3
Publication statusPublished - 1995


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