High color rendering white light source structure and manufacturing method thereof

Abstract

The invention provides a high color rendering white light source structure which comprises a white light epitaxial structure. The white light epitaxial structure is orderly provided with a diamond substrate, a GaBi transition layer, an N-GaN contact layer, a In0.19Ga0.81N / GaN multiple-quantum-well light-emitting layer, a P-GaN contact layer, an N-GaN cascade layer, an N-GaN contact layer, a In0.48Ga0.52N / GaN multiple-quantum-well light-emitting layer, and a P-GaN contact layer from the bottom to top, and an N electrode layer and a P electrode layer are disposed on the layer. According to the invention, the binding of a phosphor is removed, the high color rendering white light source structure has the advantages of good color rendering property, good stability, good luminescence quality, the improvement of working stability and service life, the saving of a part of the packaging process, the allowance of the growth of a white light crystal, the simplification of the production process of a whole industrial chain, the great improvement of production efficiency and the easy realization of industrialized mass production, the structure is formed in one time by self-made glue molding, sothe internal light stress of the white light source structure is low, the warpage deformation is also small, the light effect is improved, the process is optimized, the mechanical performance is stable, the product reliability is high, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of semiconductor lighting, in particular to a high color rendering white light source structure and a manufacturing method thereof. Background technique [0002] White light source has many advantages such as energy saving, environmental protection, long life, and can work at high speed. It has more and more uses and is penetrating every link of our life. At present, blue light is usually used to excite yellow phosphor powder to produce white light. Since the white light produced by exciting yellow phosphor powder with blue light has poor color rendering and poor stability. [0003] At present, there are three common processes for realizing white LEDs in production as follows: YAG phosphor is excited on the blue LED chip, and the yellow-green light and blue light it emits are synthesized into white light. However, the spectrum of white light emitted by this technology is missing For the red part, the color rendering ...

AI Technical Summary

Problems solved by technology

At present, blue light is usually used to excite yellow phosphors to produce white light. Because the white light produced by exciting yellow phosphors with blue light has poor color rendering and poor stability

[0003] At present, there are three common processes for realizing white LEDs in production as follows: YAG phosphor is excited on the blue LED chip, and the yellow-green light and blue light it emits are synthesized into white light. However, the spectrum of white light emitted by this technology is missing For the red part, the color rendering is poor, and it is difficult to meet the lighting requirements of low color temperature; using multiple RGB three-color chips or multiple devices to emit light and mix colors into white light, or using blue and yellow dual-chip complementary colors to produce white light, although this method can be passed Select the appropriate wavelength and intensity to obtain a better color rendering index, but the difference in chip performance makes the drive circuit too complicated and heat dissipation is a problem; apply RGB phosphor powder on the ultraviolet light chip, and use purple light to excite the phosphor powder to produce three-primary color light mixing Forms white light, however, due to the low efficiency and high cost of current UV chips and RGB phosphors, this technology has not yet reached the practical stage

Images