Abstract
Solid solution of barium strontium aluminate, Sr/BaAl2O4: Eu2+ co-doped with Dy3+ was prepared by solid state reaction method. The prepared phosphor compositions with varying Dy3+ compositions were investigated by powder X-ray diffractometer (XRD), SEM, TEM and photoluminescence (PL) excitation and emission spectra. Long persistent luminescence was observed in these phosphor materials. The broad band UV excited luminescence of the Sr/BaAl2O4:Eu2+:Dy3+ was observed in the green region (λmax = 500 nm) due to transitions from the 4f65d1 to 4f7 configuration of the Eu2+ ion. Effects of co-doping of Dy3+ on the photoluminescence properties of these compositions were investigated.
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