Investigation of Luminescence Properties of Pb2+-doped Sr2B2O5 Phosphor

A near-UV emitting phosphor, Pb2+-doped Sr2B2O5 was synthesized by the solid-state reaction method at 900 degrees C for 3hours in air. The structure of the phosphor was verified by X-ray diffraction study which shows monoclinic phase. Fourier transform infrared (FTIR) analysis confirmed the formation of Sr2B2O5. The excitation and emission spectra of the synthesized phosphors were investigated at room temperature with photoluminescence spectrophotometer. The emission and excitation bands of Pb2+-doped Sr2B2O5 were observed at 370 and 289nm, respectively. The dependence of the PL intensities on the Pb2+ concentration for the Sr2-xPbxB2O5 (0.01x0.03) phosphors was studied and it was observed that the concentration quenching of Pb2+ in Sr2B2O5 is 0.025mol.