A kind of nitride fluorescent powder and preparation method thereof

Abstract

The invention discloses a nitride phosphor and a preparation method thereof. The chemical composition is: A1‑xMpQqN3:xR, and also discloses a preparation method of the nitride. The excitation spectrum of the phosphor of the present invention is broadband excitation, covering Near-ultraviolet and blue light match well with the emission spectrum of the LED chip. The phosphor emits red light, with high luminous efficiency, wide half-peak width, and stable chemical properties. The phosphor spectrum is adjustable. By changing the ratio of metal elements in A1‑xMpQqN3:xR, the emission peak wavelength can be moved from 610nm to 665nm. The phosphor powder can also be added with high-purity ultrafine silicon powder to remove the adsorbed oxygen contained in the silicon nitride, reduce the oxygen content of the phosphor powder of the present invention, and improve the luminescent performance of the phosphor powder.

Description

technical field

[0001] The invention relates to the field of rare earth luminescent materials, in particular to a nitride fluorescent powder and a preparation method thereof. Background technique

[0002] As a new type of solid-state lighting product, white light LED has attracted much attention. White light LED has the advantages of high luminous efficiency, long life, low energy consumption, fast response speed, and no pollution. It has great development potential in the lighting market. Therefore, white light LED LEDs are regarded as essential solid-state lighting sources. At present, the traditional method widely used in the preparation of white LEDs is blue light produced by InGaN chips and yellow phosphor (YAG:Ce 3+ ) combined to produce white light, the preparation and processing of this method is simple and mature, however, the white light LED manufactured by this traditional method has poor color temperature stability and poor color rendering. However, the above-m...

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