Luminescence of Pb2+ in MAl2B2O7 (M = Ca, Sr)

Pb 2+ doped SrAl 2 B 2 O 7 was prepared by solution combustion synthesis. The synthesized material was determined by powder XRD. The photoluminescence properties of the synthesized phosphor were investi- gated at room temperature using a spectrofluorometer. The emission peak of Pb 2+ doped SrAl 2 B 2 O 7 was observed at 420 nm upon excitation at 277 nm. The Stokes shift of SrAl 2 B 2 O7:Pb 2+ was calculated to be 12 292 cm -1 . The lumi- nescence behavior of Pb 2+ in both SrAl2B2O7 and CaAl2B2O7 was discussed.