Abstract
The blue long-lasting phosphorescence (LLP) phenomenon was observed for Eu 2+-doped SrO–B 2O 3 glasses prepared in the reducing atmosphere. The phosphorescence peaks at about 450 nm due to the 4f5d→4f transition of Eu 2+. With the doping of different amounts of Eu 2+, the concentration-quenching phenomenon was observed for both the LLP and photoluminescence of the glasses, and the critical concentration for the two cases was same, i.e., 0.02 mol% Eu 2+. And by the investigation of the TL curves, the content of Eu 2+ had an effect on the trap depth of the samples. At last the possible mechanism of the LLP of the samples was suggested.
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