White light fluorescent powder for solid-state illumination

The invention provides white light fluorescent powder for solid-state lighting, which is samarium and bismuth ion co-doped sodium scandium phosphate, the chemical formula of the fluorescent powder is Na3Sc2 (PO4) 3: Sm < 3 + >: Bi < 3 + >, the element molar ratio of Na: Sc: P: O: Sm: Bi is 3: (2-x-y): 3: 12: x: y, x is more than or equal to 0.01 and less than or equal to 0.12, and y is more than or equal to 0.01 and less than or equal to 0.1. The synthesis method comprises the following steps: accurately weighing raw materials including compounds of sodium, scandium, phosphorus, samarium and bismuth, grinding and uniformly mixing, controlling the temperature to be 400-600 DEG C in an air condition, pre-sintering for 3-10 hours, grinding and uniformly mixing the pre-sintered sample again, controlling the temperature to be 1000-1300 DEG C in the air, calcining for 5-15 hours, and cooling to room temperature to obtain the fluorescent powder. The samarium and bismuth ion co-doped sodium scandium phosphate white l