[en] A new green phosphor, La_2Sr_3(BO_3)_4): x% Tb"3"+ was fabricated by solution-combustion method using urea as a fuel and ammonium nitrate as an oxidizer. The phosphor was characterised using Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC), Energy dispersive spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy (PL. The results exhibit that La_2Sr_3(BO_3)_4): x% Tb"3"+ phosphor has the strongest excitation at 209 nm with a full-width at half-maximum (FWHM) of 20 nm, and can emit bright green light at 545 nm under 209 nm excitation. The optimum concentration for Tb"3"+ in La_2Sr_3(BO_3)_4): x% Tb"3"+ is 0.033 mol%. The prominent green luminescence was due to the "5D_4–"7F_5 transition of Tb"3"+ ion. Herein, the green phosphors are promising good candidates employed in tri-color lamps.