Abstract
Ca3−xMg3(PO4)4:xEu2+ persistent phosphors were successfully synthesized by solid-state reaction method. The persistent phosphors were investigated by XRD, diffuse reflectance, photoluminescence, persistent luminescence and thermoluminescence spectra. When irradiated in advance with ultraviolet light, this phosphor shows a broad-band persistent luminescence located at ∼433nm at room temperature. The effects of the concentration of Eu2+ ions on the photoluminescence as well as persistent luminescence of Ca3−xMg3(PO4)4:xEu2+ were investigated. An energy level scheme was constructed to convey reasonable trapping and detrapping processes in the material.
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