Luminescence in Eu2+-activated microcrystalline pyrophosphor

A microcrystalline Sr₂P₂0₇:Eu²⁺ pyrophosphate-based phosphor was prepared by the modified solid-state diffusion. The crystalline phases were recognised using X-ray diffraction and surface morphology was studied by scanning electron microscope. Photoluminescence properties were investigated under ultraviolet-ray excitation. The Sr₂P₂0₇:Eu²⁺ exhibits unique colour: a blue band centred at 430 nm originating from Eu²⁺ when excited at 328 nm, Commission Internationale de l Eclairage chromaticity coordinate values are calculated from emission spectra of Sr₂P₂0₇:Eu²⁺ for the prepared sample. The results show Sr₂P₂0₇ is a promising microcrystalline host lattice for the solid-state lighting.