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Long persistent SrAl 2 O 4 :Eu 2+ phosphors co-doped with Dy 3+ were prepared by the solid state reaction method. The main diffraction peaks of the monoclinic structure of SrAl 2 O 4 were observed in all the samples. The broad band emission spectra at 497nm for SrAl 2 O 4 :Eu 2+ , Dy 3+ were observed and the emission is...
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