White-light LED based on gold-silver alloy cluster and preparation method thereof

Abstract

The invention discloses a white-light LED based on a gold-silver alloy cluster and a preparation method thereof. The white-light LED comprises an insulating base, a bowl-shaped reflector, an ultraviolet light LED chip and a lens, wherein the bowl-shaped reflector is arranged on the insulating base, a heat conducting sheet is arranged between the bowl-shaped reflector and the insulating base, the ultraviolet light LED chip is fixed in the bowl-shaped reflector, the ultraviolet light LED chip is covered with the gold-silver alloy cluster and the blue light fluorescent powder, the lens is arranged outside the bowl-shaped reflector, and the lens is filled with the transparent silicon resin packaging material. A gold-silver alloy cluster is obtained through an aqueous solution method mild reaction, the solution is subjected to freeze-drying into solid powder, the ultraviolet light LED chip is fixed in a bowl-shaped reflector, the ultraviolet light LED chip is coated with a gold-silver alloycluster and blue light fluorescent powder layer by layer, curing is conducted, a lens is placed outside the bowl-shaped reflector, and the bowl-shaped reflector is filled with a transparent packagingmaterial. The light-emitting efficiency, the use stability and the service life of the LED can be improved.

Description

technical field [0001] The invention relates to a white light LED and a preparation method thereof, in particular to a white light LED produced by exciting a broad-spectrum orange-red light gold-silver alloy cluster and a blue phosphor powder to emit light through an ultraviolet light LED, and belongs to the technical field of semiconductor lighting. Background technique [0002] As a new generation of solid light source, semiconductor LED has the advantages of energy saving, environmental protection, durability, high energy density and small size. It has been widely used in LCD backlight, large color display, landscape lighting, automotive lights and landscape decoration. It is a research hotspot in optoelectronics, lighting and other fields. [0003] The common preparation methods of white light LEDs include ultraviolet light LED excitation phosphor powder, blue light LED excitation phosphor powder, red, green and blue three-color LED chip combination, various methods prod...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the existing white light LED technology, the present invention provides a white light LED manufactured by exciting orange-red light gold-silver alloy clusters and blue light phosphors to emit light from the ultraviolet light LED, so as to solve the problem of low color rendering and partial color gamut of the current white light LED. Problems such as narrowness and poor stability

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