Synthesis and Photoluminescent Properties of Li 2 SrSiO 4 :Pb 2+

Pure and Pb 2+ doped Li2SrSiO4 materials were synthesized at 900°C for 12 h in air. The phases of the synthesized materials were determined by X-ray powder diffraction (XRD). The photoluminescence properties of the synthesized phosphors were investigated by spectrofl uorometry at room temperature. The emission and excitation bands of Li 2 SrSiO 4 :Pb 2+ were observed at 381 and 271 nm, respectively. The dependence of the emission intensity on Pb 2+ concentration for Li 2 Sr 1-x PbxSiO 4 was studied in detail. It was observed that the optimum concentration of Pb 2+ in Li 2 SrSiO 4 is 0.01 mol.%. The Stokes shifts of Li 2 SrSiO 4 :Pb 2+ phosphor was calculated to be 10653 cm -1 . © 2014 Springer Science+Business Media New York