Synthesis and tunable emission properties of CaZr(PO sub(4)) sub(2):Mn super(2+), Sm super(3+) phosphor

CaZr(PO sub(4)) sub(2):Mn super(2+) and CaZr(PO sub(4)) sub(2):Mn super(2+), Sm super(3+) phosphors are synthesized by high-temperature solid state reaction method in air. CaZr(PO sub(4)) sub(2):Mn super(2+) phosphor shows green emission and its broad emission band peaking at ~545 nm within the range 470-650 nm is attributed to the super(4)T sub(1)(G) arrow right super(6)A sub(1)( super(6)S) transition of Mn super(2+) ion. The optimal Mn super(2+) doping concentration is ~5 mol% in CaZr(PO sub(4)) sub(2):Mn super(2+) phosphor. CaZr(PO sub(4)) sub(2):Mn super(2+), Sm super(3+) phosphor with excitation 399 nm emits reddish-orange light, and it shows a systematically varied hue from green to yellow with excitation 405 nm by changing Sm super(3+) and Mn super(2+) ions concentration. The luminous mechanism of CaZr(PO sub(4)) sub(2):Mn super(2+), Sm super(3+) phosphor is analyzed and explained by the simplified energy level diagrams of Mn super(2+) and Sm super(3+) ions in CaZr(PO sub(4)) sub(2):Mn super(2+), Sm super(3+) phosphor. The experimental results are helpful to develop new Mn super(2+)/Sm super(3+)-dop ed materials.