GaN-based light emitting diode (LED) epitaxial structure with V-pit multi-quantum well multi-wavelength and fabrication method thereof

Abstract

The invention discloses a GaN-based light emitting diode (LED) epitaxial structure with V-pit multi-quantum well multi-wavelength and a fabrication method thereof. The structure comprises a substrate, a buffer layer, an n-type layer, an active layer and a P-type layer, wherein the buffer layer, the n-type layer, the active layer and the P-type layer are sequentially laminated on the substrate, the active layer comprises a multi-layer structure and a luminous unit, the luminous unit comprises 3-10 multi-quantum well luminous regions emitting luminous wavelengths, the multi-layer structure exists in a V pit, and the V pit generates the multi-layer structure and passes through the multi-quantum well luminous regions. Through the GaN-based light emitting diode (LED) epitaxial structure with V-pit multi-quantum well multi-wavelength, obtained according to the method, the problems of short service lifetime of fluorescent powder, high color temperature, low color rendering index, partial harm of blue-light short-wavelength and the like existing in the conventional mainstream white-light LED can be solved, and a single-chip LED without the fluorescent powder gives out white light.

Description

technical field [0001] The invention relates to the field of semiconductor light-emitting devices, in particular to a GaN-based LED epitaxial structure with V pits, multiple quantum wells, and multiple wavelengths and a preparation method thereof. Background technique [0002] LED is called the fourth-generation lighting source or green light source. It has the characteristics of energy saving, environmental protection, long life, and small size. It can be widely used in various indications, displays, decorations, backlights, general lighting, and urban night scenes. There are usually two ways to realize white LED. The first is to use GaN-based blue LED and phosphor to form white light; the second is to use a variety of monochromatic light (blue, green, yellow, red four primary colors or five , six primary colors) mixed to form white light. [0003] Today, when energy conservation and environmental protection are advocated, LED lighting sources have achieved unprecedented d...

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Problems solved by technology

[0003] Today, when energy conservation and environmental protection are advocated, LED lighting sources have achieved unprecedented development, but the human eye health problems caused by LED lighting have not been warned in this industry, and there are relatively There are many high color temperature and low-priced low-quality products. The main reason is that manufacturers and users of LED light sources do not understand the blue light hazards produced by LED lighting.

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