The Ba3－xSi₆O₁₂N₂:xEu²⁺ phosphors were synthesized by a conventional solid state reaction method.X-ray diffraction patterns show that all the samples have a Ba₃Si₆O₁₂N_2pure phase .The excitation spectra indicate that the samples could be effectively excited by the UV to blue light in the region of 250－470nm.The emission spect ra show a typical broad emission band which is assigned to transmition of ^4f₇→^4f₆^5d1of Eu²⁺ ion when excited at 390nm.The emission peaks are located around 495nm,and the half-peak width covers the dark-green light (480－557nm).The effect of Eu²⁺ ion concentration on t he luminescent properties is also investigated.The results show that the emission intensity increases with the Eu²⁺ ion concentration (x≤0.15).When x=0.15,the emission intensity reaches a maximum, and the wavelength of emission peak is the minimum (492nm).Then the emission in ten sity begins to decrease (x＞0.15),which is due to the concentration quenching effect.When the Eu²⁺ ion concentration increases, the distance between Eu²⁺ ions decreases,and the radiation transition probability increases,leading to the decrease of emission intensities .The emission intensities and wavelengths of different samples have the opposite trend,which follows the Stokes′ law.These results present that the Ba₃Si₆O₁₂N₂:Eu²⁺ could be an attractive candidate phosphor in white LED applications.