Ca2BO3Cl:Eu2+ yellow phosphor was synthesized by a high temperature solid-state reaction method,and it can be excited by ultraviolet-near ultraviolet and blue light irradiation.The final phase is investigated with the conventional X-ray diffraction(XRD).The spectral characteristics of the phosphor are studied by using a Hitachi F-4600 fluorescence spectrophotometer equipped with a 450 W Xe lamp.The effects of Ce3+,CaCl2 and H3BO3 on the crystal structure and luminescent properties of Ca2BO3Cl:Eu2+ are studied.The results show that its emission intensity can be effectively enhanced by increasing absorption in the region of ultraviolet-near ultraviolet light,which is from the sensitizer Ce3+.The emission intensity of Ca2BO3Cl:Eu2+ can also be enhanced by the excess CaCl2 and H3BO3,and the optimal excess mole concentrations are 5 mol% and 15 mol%,respectively.White LED is fabricated with the phosphor and the 460 nm InGaN LED chip,and the CIE chromaticity coordinate is (0.339,0.351).