Luminescence and energy transfer of tunable emission phosphor Ca2PO4Cl:Ce(3+), Mn(2+)

A series of Ca2PO4Cl:Ce(3+), Mn(2+) phosphors are synthesized by a high temperature solid state reaction method, and their luminescent properties are investigated. Ca2PO4Cl:Ce(3+), Mn(2+) has an obvious absorption in the region of 300-350 nm, and energy transfer from Ce(3+) to Mn(2+) in Ca2PO4Cl has been validated, and proved to be a resonant type via a dipole-dipole interaction. Orange red emission intensity of Mn(2+) can be obviously enhanced via the efficient energy transfer from Ce(3+) to Mn(2+), and critical distance of energy transfer is also calculated by concentration quenching method, and about 14.1 Å. The results show that Ce(3+) ion may be an available sensitizer for Ca2PO4Cl:Mn(2+), and Ca2PO4Cl:Ce(3+), Mn(2+) may have potential application in white light emitting diodes.