Method for uninterrupted growth of high-quality InGaN/GaN multi-quantum well (MQW)

Abstract

The invention discloses a method for uninterrupted growth of a high-quality InGaN / GaN multi-quantum well (MQW). The method comprises the following steps of: carrying out uGaN epitaxial growth on a sapphire-patterned substrate, growing nGaN on uGaN, and then, growing an MQW stress release layer on nGaN; carrying out InGaN / GaN MQW epitaxial growth on the MQW stress release layer; repeatedly growing a plurality of InGaN / GaN MQWs on the InGaN / GaN MQW; and growing pAlGaN and pGaN needed by a GaN-based LED (Light Emitting Diode) on the InGaN / GaN MQWs. According to the method for the uninterrupted growth of the high-quality InGaN / GaN MQW, a metal organic chemical vapor deposition method is adopted, and the growth of the GaN is kept during the process of switching growing conditions for quantum wells and quantum barriers, namely the uninterrupted growth of the quantum wells, so that the time required for the growth of the MQW is shortened, the production efficiency is greatly increased, and meanwhile, an LED epitaxial wafer with the high-quality InGaN / GaN MQW is obtained.

Description

technical field [0001] The invention relates to the technical field of quantum well growth, in particular to a method for growing high-quality InGaN / GaN multiple quantum wells without interruption, which is suitable for commercial production of high-brightness GaN-based LED epitaxial wafers. Background technique [0002] GaN-based LEDs have now entered the stage of commercial production. How to shorten the growth time of GaN-based LED epitaxial wafers while obtaining high-quality epitaxial wafers to increase production capacity has become a research focus. At present, MOCVD is used for commercial production of GaN-based LED epitaxial wafers. Due to the differences in the growth temperature and atmosphere between InGaN quantum wells and GaN quantum barriers, there is a lot of time spent in switching the temperature and atmosphere required for the growth of quantum wells and quantum barriers during the growth of InGaN / GaN multiple quantum wells. Quality generally does not und...

AI Technical Summary

Problems solved by technology

Due to the differences in the growth temperature and atmosphere between InGaN quantum wells and GaN quantum barriers, there is a lot of time spent in switching the temperature and atmosphere required for the growth of quantum wells and quantum barriers during the growth of InGaN / GaN multiple quantum wells. Quality generally does not undergo epitaxial growth, so there is intermittent growth during the growth of quantum wells, and the time utilization rate is not high

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