GaN-based LED (Light-Emitting Diode) device with two-dimensional electron gas structure, and preparation method for GaN-based LED device

Abstract

The invention discloses a GaN-based LED (Light-Emitting Diode) device with a two-dimensional electron gas structure, and a preparation method for the GaN-based LED device. The LED device comprises a substrate, a GaN nucleating layer, a GaN buffer layer, a non-doped GaN layer, an N-type GaN layer, the two-dimensional electron gas structure, a multi-quantum well luminous layer and a P-type GaN layer. According to the LED device, the two-dimensional electron gas structure is an electron emission layer formed by alternately stacking a plurality of pairs of lightly-doped n-GaN layers / AlN layers / heavily-doped n+GaN layers from bottom to top, the overflow of electrons into a non-quantum well area for nonradiative recombination with electron holes under a heavy-current injection condition can be effectively inhibited, and in addition, by two-dimensional electron gas, the transverse spreading efficiency of the electrons can be improved to improve the luminous efficiency of LEDs under the heavy-current injection condition.

Description

technical field [0001] The invention relates to the technical field of semiconductor light emitting devices, in particular to a GaN-based LED device with a two-dimensional electron gas structure and a preparation method thereof. Background technique [0002] A light-emitting diode (Light-Emitting Diode, LED) is a semiconductor electronic component capable of emitting light. This electronic component appeared as early as 1962. In the early days, it could only emit red light with low luminosity. Later, other monochromatic light versions were developed. Today, the light that can be emitted has covered visible light, infrared rays and ultraviolet rays, and the luminosity has also increased to a considerable extent. of luminosity. And the use is also used as indicator lights, display panels, etc. from the beginning; with the continuous advancement of technology, light-emitting diodes have been widely used in displays, TV lighting decoration and lighting. [0003] LED is a solid...

AI Technical Summary

Problems solved by technology

With the increasing application scope of LED in the lighting and backlight market year by year, the application demand of medium and high power devices has increased significantly. However, LEDs have the problem of attenuation of luminous efficiency under high current injection, which limits the application of high power and high brightness LEDs to a certain extent. Development, also restricts the development of LED in the field of general lighting

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