Luminescence properties and energy transfer of Ce3+, Tb3+ codoped Ba2GaB4O9Cl Phosphor

In this paper, a series of Ba2GaB4O9Cl:Ce 3+ ,Tb 3+ phosphors were synthesized by the conventional high-temperature solid-state reaction. The incorporation of Ce 3+ ions as sensitizers significantly enhances the absorption and luminescence intensity of Tb 3+ ions in the Ba 2 GaB 4 O 9 Cl phosphor. The energy transfer from Ce 3+ to Tb 3+ occurs through the electric quadrupole-quadrupole interaction, with an energy transfer efficiency of 48 %. The internal quantum efficiency of Ba 2 GaB 4 O 9 Cl:Ce 3+ ,Tb 3+ phosphor is 39.95 % upon 316 nm excitation. At 423 K, the emission intensity of Ba 2 GaB 4 O 9 Cl:Ce 3+ ,Tb 3+ can keep 53.28 % of its initial value at room temperature. All these results indicate that the Ba 2 GaB 4 O 9 Cl:Ce 3+ ,Tb 3+ phosphor has potential application for white LED.