Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 390, Issue 1-2, Pages 133-137Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2004.06.096
Keywords
luminescence; phosphor; alkaline earth silicates; long afterglow
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Long lasting afterglow phosphors Sr2MgSi2O7:Eu,Dy and Ca2MgSi2O7:Eu,Dy were prepared by solid-state reaction method. It is revealed by the results that both phosphors show two emission peaks that are caused by the different emitting centers EU2+ held in the host lattice. Wavelength shift was observed due to the slight differences in the structure parameters of the two hosts. Investigation on afterglow property shows that Sr2MgSi2O7:Eu,Dy phosphor held a better afterglow property than Ca2MgSi2O7:Eu,Dy phosphor. Thermal simulated luminescence study indicates that the long afterglow is generated by a higher trap concentration formed by the co-doped rare earth ions within the host. (C) 2004 Elsevier B.V. All rights reserved.
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