Preparation method of blue light material and red light material-based LED light source and LED chip

Abstract

The invention provides a preparation method of a blue light material and red light material-based LED light source. The method comprises the steps of selecting sapphire as a substrate (11); growing blue light materials on the substrate (11), wherein the blue light materials are used for generating blue light under the drive of blue light drive voltage; selectively etching the blue light materialsto form red light wick grooves; growing red light materials in the red light wick grooves, wherein the red light materials are used for generating red light under the drive of red light drive voltage;and preparing electrodes on the blue light materials and the red light materials separately to complete preparation of the blue light material and red light material-based LED light source. The preparation method has the beneficial effects that (1) the light of multiple colors can generated on one chip and the dosage of fluorescent powder is relatively small; (2) the integration level is improvedand the cost of an LED can be reduced; and (3) color temperature adjustment is more flexible.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a method for preparing an LED light source based on blue light materials and red light materials. Background technique [0002] LED light sources are more and more commonly used in the field of lighting. Usually, the LED light source emits various colors of light through the LED light-emitting chip and phosphor powder. In the prior art, a single light-emitting chip can only emit monochromatic light. To synthesize light of other colors, it is necessary to mix light-emitting chips of different colors together and fill a large amount of phosphor powder. Difficult question. In addition, strong scattering occurs when light is incident on the phosphor layer, which makes the phosphor layer absorb light, causing a large amount of light to be reflected, that is, the light transmitted through the phosphor layer will be significantly reduced. Therefore, how to design a new type of...

AI Technical Summary

Problems solved by technology

In the prior art, a single light-emitting chip can only emit monochromatic light. If light of other colors needs to be synthesized, light-emitting chips of different colors need to be mixed together and filled with a large amount of phosphor powder. difficult problem

In addition, when light is incident into the phosphor layer, there will be strong scattering, which will cause the phosphor layer to absorb light, causing a large amount of light to be reflected, that is, the light transmitted through the phosphor layer will be significantly reduced.

Images