The NaCaPO

4

:Tb

3+

green phosphor applicable for UVLED chip was synthesized by the general high temperature solid-state reaction and its luminescence properties were investigated. It shows six major emission peaks locating at 420

442

492

545

584 and 620 nm

which correspond to the

5

D

3

7

F

5

5

D

3

7

F

4

5

D

4

7

F

6

5

D

4

7

F

5

5

D

4

7

F

4

and

5

D

4

7

F

3

typical transition of Tb

3+

respectively. The most intense peaks located at 492 nm and 545 nm and the phosphor shows excellent green emission. The excitation spectra contain a weak broad band extending from 200 to 280 nm and two peaks at 330~390 nm

which correspond well with the emission of UVLED (350~410 nm). The effects of doped-Tb

3+

concentration and charge-compensating of Li

+

Na

+

and K

+

on the emission intensity were also investigated. It shows that the optimum doped-Tb

3+

concentration is 10% and Li

+

gives the best improvement to enhance the intensity of the emission. The NaCaPO

4

:Tb

3+

is a potential green-emitting phosphor for white light emitting diode (W-LED).