Abstract
Eu2+/Dy3+ doped SrAl2Si2O8 phosphors were synthesized by a solid state reaction. The phase and luminescent properties of the synthesized phosphors were investigated by the X-ray powder diffraction, photoluminescence spectra, decay curves and the thermo-luminescence glow curves. The XRD results show that the doped Eu2+/Dy3+ has no influence on the phase of SrAl2Si2O8. The incorporation of Dy3+ could significantly enhance the intensity and prolong the afterglow duration of SrAl2Si2O8:Eu2+. The co-doped Dy3+ ions act as trap centers and trap the electrons generated during exposure of the phosphor to an excitation source, which induces the longer afterglow comparing with Eu2+ singly doped SrAl2Si2O8 phosphor.
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