Tunable luminescence and energy transfer properties in Ca 8 MgLu(PO 4 ) 7 :Ce 3+ ,Tb 3+ ,Mn 2+ phosphors

The chromaticity coordinates of CMLP:0.02 Ce 3+ , x Tb 3+ and CMLP:0.02 Ce 3+ , y Mn 2+ shift from the blue to red (arrow a) and green region (arrow b) respectively, as the value of x and y increase based on the energy transfers from Ce 3+ to Tb 3+ and Mn 2+ . White light is obtained in CMLP:0.02Ce 3+ ,0.04Tb 3+ ,0.04Mn 2+ .