A strong green-emitting phosphor: K3Gd(PO4)2:Tb3+ for UV-excited white light-emitting-diodes

K3Gd(PO4)2:Tb 3+ phosphors are synthesized by the solid reaction method, and the phases and luminescence properties of the obtained phosphors are well characterized.The emission spectra of K3Gd(PO4)2:Tb 3+ exhibit the typical emissions of Tb 3+ .Concentration quenching of Tb 3+ is not observed in K3Gd(PO4)2:Tb 3+ , likely because the shortest average distance of Tb 3+ -Tb 3+ in K3Gd(PO4)2:Tb 3+ is adequately long such that energy transfer between Tb 3+ -Tb 3+ ions cannot take place effectively.This result indicates that K3Tb(PO4)2 phosphors have potential application in near ultraviolet (n-UV)-convertible phosphors for white light-emitting diodes.