Eu and Dy-doped strontium aluminate is a long-lasting phosphor for practical applications in displays and emergency signage. SrAl2O4 synthesized samples have been systematically investigated by PXRD, SEM and photoluminescence. The optimization of the properties has been determined in terms of varying concentrations of Sr2+ (alkali metal ion concentration) and the dopant concentrations of Eu2+ and Dy3+. A new method of synthesis requiring hydrate solutions of the metal ions and cellulose precursor called Liquid Phase Precursor method (LPP) has been adapted. The emission intensity was observed to be higher for the prepared samples compared to a commercial product prepared with a solid state reaction method.

Keywords: Emission properties; PXRD; SEM; Dopant concentration; Persistent luminescence