Novel low-cost single-matrix fluorescent powder for white light LED

Abstract

The invention belongs to the field of fluorescent materials. The chemical formula of the novel low-cost single-matrix fluorescent powder for the white-light LED is Ca8MgLu(0.6-x)Alx(PO4)7: 0.4 Eu<3+>,wherein x is greater than or equal to 0 and less than or equal to 0.6. The fluorescent powder disclosed by the invention has stable property structure and fluorescence property, and is simple in preparation method and low in cost.

Description

technical field [0001] The invention belongs to the field of fluorescent materials and relates to a novel low-cost single-matrix fluorescent powder for white light LEDs. Background technique [0002] White light LED is a new type of solid cold light source, which has the advantages of high brightness, low energy consumption, and low pollution. It is called the fourth-generation light source after incandescent light, fluorescent lamp and high-pressure gas discharge lamp. The main way of white light is phosphor conversion. The luminous performance of phosphor directly affects the main performance and indicators of light sources such as luminous efficiency, color rendering index, and light color temperature of white LED products. At present, there are four ways of white light LED: yellow phosphor plus blue LED chip, red, green and blue three-color semiconductor chip, red, green and blue three-color phosphor powder coated on the near-ultraviolet LED chip, and white light phospho...

AI Technical Summary

Problems solved by technology

However, due to the scarcity of rare earth elements, the preparation cost of phosphors composed of them is relatively high, so it is urgent to seek a metal element with a lower price and excellent properties as a substitute.

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