New green-emitting phosphors, Zr2O(PO4)(2):x%Tb3+ (1 <= x <= 10), were synthesized in a single-phase form by a liquid-phase method and photoluminescence properties were characterized. The excitation spectrum consisted of a strong broad band from 220 to 290 nm, corresponding to the 4f-5d transition of Tb3+. The phosphors exhibit typical emission peaks assigned to the transition from D-5(4) to F-7(J) (J = 6, 5, 4, and 3) of Tb3+. The maximum peak intensity was obtained for Zr2O(PO4)(2):3%Tb3+.