A series of Tb3+-Sm3+-codoped Na3Bi(PO4)(2) phosphors have been prepared by a high-temperature solid-state reaction, and their luminescence properties have been investigated in detail. The energy transfer process from Tb3+ to Sm3+ was verified through luminescence spectra and fluorescence decay curves. Moreover, the energy transfer mechanism was demonstrated to be the dipole-dipole interaction and the ET efficiency as well as quantum efficiency was also estimated. By controlling the doping content of the Sm3+ ions with the fixed Tb3+ content, the emission color of the obtained phosphors could be easily modulated from green to yellow and then to yellow-white. Additionally, as the temperature increases from RT to 150 A degrees C, the PL intensity of transition of Sm3+ decreased to 79 %, which prove good thermal stability of Na3Bi(PO4)(2):xSm(3+),0.1Tb(3+) phosphors. All the results indicate that the series of Na3Bi(PO4)(2):xSm(3+),0.1Tb(3+) phosphors can be acted as a good candidate for the application in white light-emitting diodes.