A novel green phosphor,Sr2MgB2O6∶Tb3+,Li+ for white light-emitting diodes was prepared by solid-state reactions,and its structure and luminescence properties were investigated.The excitation and emission spectra indicated that this as-prepared phosphor could be effectively excited by ultraviolet 368 nm,and exhibited bright green emission centered at 545 nm corresponding to the 5D4→7F5 transition.9 mol.％ of Tb3+ was shown to be optimal.Good green emissions with the CIE chromaticity coordinates (0.262,0.583) could be achieved.Furthermore,the integrated emission intensity of Sr2MgB2O6∶0.09Tb3+,0.09Li+ phosphor decreased continuously to 72.1％ at 300 ℃ with increasing temperature,and the activation energy of thermal quenching (Ea) was calculated to be 0.175 eV,moreover,the quantum yield excited by 368 nm was measured as 11.1％.A green emission LED was made by coating Sr2MgB2O6∶0.09Tb3+,0.09Li+ phosphor on a NUV (365-370 nm) chip.Our results showed that Sr2MgB2O6∶Tb3+,Li+ is a kind of potential green-emitting phosphor and features good thermal stability.