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Visible luminescence of dysprosium ions in oxyhalide lead borate glasses
Joanna Pisarska1, Lidia Żur, Wojciech A Pisarski
1University of Silesia, Institute of Chemistry, Szkolna 9, 40-007 Katowice, Poland. Joanna.Pisarska@us.edu.pl
Abstract:
Visible luminescence of Dy(3+) ions in oxyhalide lead borate glasses was examined. Luminescence spectra show two intense bands at 480 nm and 573 nm due to (4)F(9/2)→(6)H(15/2) (blue) and (4)F(9/2)→(6)H(13/2) (yellow) transitions of Dy(3+). Luminescence decays from (4)F(9/2) state and yellow-to-blue luminescence intensity ratios (Y/B) were analysed with PbX(2) (X=F, Cl) content. An introduction of PbX(2) to the borate glass results in the increasing of (4)F(9/2) lifetime and the decreasing of yellow-to-blue luminescence intensity ratio, which is due to reduction of covalency between Dy(3+) and O(2-)/X(-) ions.
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