The exploration and characterization of an orange emitting long persistent luminescence phosphor LiSr4(BO3)3:Eu2+

An orange emitting long persistent phosphor LiSr4(BO3)3:Eu2+ was prepared successfully using a conventional solid state reaction method. The luminescent and persistent luminescence properties were studied using fluorescence spectra, decay curves, persistent luminescence spectra and thermoluminescence (TL) glow curves. The effects on the fluorescence and persistent luminescence properties by the dosage of Li2CO3 were explored. The relationship between the Eu2+ contents and persistent luminescence properties were studied. The optimal doping concentration of Eu2+ was experimentally to be 1 mol%. The detailed processes and a possible mechanism were also discussed.