SiO2 added phosphors, SrAl2Si2O8:Eu2+ + xSiO(2) (x = 0, 1, 2 and 3 mol) were synthesized by a novel liquid phase precursor (LPP) method. The photoluminescence properties of phosphor added by 2 mol of SiO2 showed 71% increase in the emission intensity compared with the SrAl2Si2O8:Eu2+ phosphor. A broad emission and excitation wavelength was observed approximately from 400 nm to 600 nm centered at 430 nm and from 300 nm to 400 nm centered at 350 nm, respectively. Photoluminescence intensity of the phosphors increased continuously by SiO2 addition up to x = 2 mol and then it decreased at 3 mol of SiO2. The observed photoluminescence properties of the phosphors were discussed by their crystalline structure and morphology.

Keywords: Optical materials; X-ray diffraction; Luminescence; Optical properties