Phosphate fluorescent powder, preparation method and application thereof

Abstract

The invention discloses a phosphate fluorescent powder, a preparation method and an application thereof. The chemical formula of phosphate fluorescent powder is Re3PO7, wherein Re is a rare earth element. The phosphate fluorescent powder disclosed by the invention exists in the form of substrate luminescence; the phosphate fluorescent powder is prepared from phosphate radical compound and rare earth element compound at different mole ratios according to a high-temperature solid phase method; the content of rare earth element is as high as 75%-78%; the defect of low active ion concentration influorescent powder is overcome; the quantum saturation absorptivity can reach up to 95%; the phosphate fluorescent powder has excellent quenching resistance and high quantum saturation absorptivity. The preparation method disclosed by the invention is simple, is high in repeatability and is beneficial to industrial production; the prepared phosphate fluorescent powder can be stimulated from ultraviolet region to visible region; the substrate can emit blue / blue-green / red light; the chemical property is stable; the light intensity is high; the phosphate fluorescent powder can be widely applied to the field of laser lighting and LED illumination.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a phosphate fluorescent powder and a preparation method and application thereof. Background technique [0002] Lighting technology is crucial to the development of human beings. Compared with LED lighting technology, laser lighting has a smaller light-emitting area, higher luminous efficiency, easier sensory focus and longer irradiation distance. It can be widely used in car headlights and other Special fields, such as projectors, digital cinemas, TVs, stage lights, large-screen splicing, etc. It can be seen that laser lighting technology has broader application prospects and will become a development trend of the future display industry. At present, the easiest and cheapest way to realize laser lighting is to use blue light to excite yellow phosphor powder to realize white light illumination. Yellow phosphor powder is the key part of converting blue light laser int...

AI Technical Summary

Problems solved by technology

At present, the most widely used yellow phosphors are aluminate Y 3 Al 5 o 12 : Ce 3+ Phosphor powder, oxynitride (α-SiAlON: Eu 2+ , α-CaSiAlON:Eu 2+ ) Phosphor powder, etc. This kind of yellow phosphor mainly causes the phosphor to emit light by doping a small amount of rare earth elements into the matrix. However, the doping concentration of its active ions is often low, and heavy doping will lead to a concentration Quenching, resulting in a substantial reduction in the luminous intensity of the substance or even no luminescence

In addition, ordinary commercial phosphors tend to be saturated at high excitation densities, and part of the absorbed energy will be converted into heat and cause heat generation, which will eventually lead to a decrease in the luminous efficiency of the phosphors.

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