[en] A novel green phosphor SrZn_2(PO_4)_2:Tb"3"+ is synthesized by a high temperature solid-state method, and its luminescent property is investigated. X-ray diffraction patterns of SrZn_2(PO_4)_2:Tb"3"+ indicate a similarity crystalline phase to SrZn_2(PO_4)_2. SrZn_2(PO_4)_2:Tb"3"+ shows green emission under 369 nm excitation, and the prominent luminescence in green (544 nm) due to "5D_4–"7F_5 transition of Tb"3"+. For the 544 nm emission, excitation spectrum has several excitation band from 200 nm to 400 nm. Emission intensity of SrZn_2(PO_4)_2:Tb"3"+ is influenced by Tb"3"+ concentration, and concentration quenching effect of Tb"3"+ in SrZn_2(PO_4)_2 is also observed. With incorporating A"+ (A=Li, Na, and K) as compensator charge, the emission intensity of SrZn_2(PO_4)_2:Tb"3"+ can be obviously enhanced. CIE color coordinates of SrZn_2(PO_4)_2:Tb"3"+ locate in the green region. The results indicate this phosphor may be a potential application in white LEDs. - Graphical abstract: SrZn_2(PO_4)_2:Tb"3"+ can produce green emission under near-UV excitation, and its luminescent properties can be improved by incorporating A"+ (A=Li, Na, and K). - Highlights: • SrZn_2(PO_4)_2:Tb"3"+ can produce green emission under near-UV excitation. • Concentration quenching effect of Tb"3"+ in SrZn_2(PO_4)_2 is observed. • Emission intensities of SrZn_2(PO_4)_2:Tb"3"+ are enhanced by codoped A"+ (A=Li, Na, K)