Light-emitting LED of realizing adding red light phosphor in blue-green light on the same substrate

Abstract

The invention provides a light-emitting LED of realizing adding red light phosphor in blue-green light on the same substrate. The light-emitting LED of realizing adding red light phosphor in blue-green light on the same substrate includes the following steps: coarsening an epitaxy substrate, coating the epitaxy substrate with a layer of 10 mu m high-temperature resisting photoresist; disposing a prepared blue light hollow light mask plate on the photoresist, and removing the exposure part; performing epitaxy growth on the photoetched substrate, and coating a layer of photoresist again after completing blue light epitaxy; disposing a prepared green hollow light mask plate on the photoresist, and removing the exposure part; disposing the photoetched substrate in a green light epitaxial furnace to perform epitaxy growth; and vapor plating, manufacturing electrode, testing, and performing splintering on a blue-green wafer which is taken as one body to obtain a blue-green light wafer with a unified substrate. The light-emitting LED of realizing adding red light phosphor in blue-green light on the same substrate can produce a wide color gamut LED that the color gamut exceeds 100% standard NTSC by producing blue light and green light wafers with super narrow wavelength (less than 50nm) through epitaxy growth on the same substrate and matching with red phosphor with super narrow wavelength.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to an LED that realizes blue-green light plus red light fluorescent powder on the same substrate. Background technique [0002] The most common way in the LED industry is blue LED with yellow phosphor to produce white light. Currently, there are blue LED with yellow phosphor to produce white light and blue LED with green phosphor and red phosphor to produce white light, especially blue LED with fluoride. The high color gamut scheme of phosphor powder has been applied for patent by Nichia and General Electric. [0003] The existing LED white light technology uses blue LEDs and yellow phosphors to produce white light, but the white light produced by this method has a low color gamut coverage, resulting in color distortion and unsaturated colors, which cannot meet the needs of modern people for colors. For this reason, in order to improve the color gamut of white light, it is realized by...

AI Technical Summary

Problems solved by technology

[0003] The existing LED white light technology uses blue LEDs with yellow phosphors to produce white light, but the white light produced by this method has a low color gamut coverage, resulting in color distortion and unsaturated colors, which cannot meet the needs of modern people for colors.

For this reason, in order to improve the color gamut of white light, it is realized by combining blue LEDs with red phosphors and green phosphors, but due to material and process reasons, the half-wave width of green phosphors is not as narrow as that of red light (in 7.5nm), which leads to the inability to achieve 100% or even higher color gamut

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