Luminescence and energy transfer of Ce3+ and Pr3+ in LaBSiO5

Ce3+, Pr3+ singly doped and Ce3+-Pr3+ doubly doped LaBSiO5 phosphors were prepared by a high-temperature solid state reaction route. The synchrotron radiation VUV-UV excitation spectra of Ce3+ and Pr3+ were measured and the luminescence properties were discussed. The band gap of host compound LaBSiO5 was estimated from the VUV excitation spectrum of sample activated with Gd3+. Furthermore, the influence of temperature on luminescence of Ce3+ was discussed and the activation energy for thermal quenching was evaluated. The occurrence of energy transfer from excited 5d states of Pr3+ to Ce3+ was confirmed by the emission spectra of co-doped samples La0.99−xPrxCe0.01BSiO5 and La0.995−xPr0.005CexBSiO5 with different x values.