Luminescence properties, energy transfer and thermal stability of white emitting phosphor Sr(PO):Ce/Tb/Mn for white LEDs.

A series of Sr(PO):Ce/Mn/Tb phosphors were synthesized by a high temperature solid phase method. After introducing Ce as sensitizer in Sr(PO):Ce/Mn, the efficient energy transfer from Ce to Mn was observed and analyzed in detail, and Sr(PO):Ce/Mn was demonstrated to be color tunable, changing from blue to orange red. In addition, Tb ion, which mainly emits green light, was further added into the Sr(PO):Ce/Mn.