Single matrix panchromatic fluorescent powder material for white light LED (light emitting dioxide) and preparation method thereof

The invention discloses a single matrix panchromatic fluorescent powder material for a white light LED (light emitting dioxide) and a preparation method thereof and belongs to the technical field of light emitting materials. The chemical composition of the fluorescent powder material is as follows: Sr2MgSi2O7:xCe , yTb , zMn , wherein x is 0.001-0.1, y is 0.005-0.2 and z is 0.05-0.1. The preparation method of the fluorescent powder material comprises the following steps: firstly, preparing a precursor liquid; after carrying out hydrothermal reaction on the precursor liquid, cooling, washing and centrifugalizing the reaction product, collecting precipitates, and then drying to obtain powder; and then, after calcining the powder and cooling to room temperature to obtain single matrix panchromatic fluorescent powder material for the white light LED, namely Sr2MgSi2O7:xCe , yTb , zMn . The single matrix panchromatic fluorescent powder material disclosed by the invention is easily available in reaction raw materials, low in synthetic temperature, relatively low in cost, simple in process operation and relatively high in yield. The fluorescent powder prepared by the preparation method is high in light emitting strength, low in color temperature and high in phase purity, and can emit white light under excitation of 365nm ultraviolet light.