Green InGaN/GaN Multiple-Quantum-Wells With Pre-Layer for High-Efficiency Mini-LEDs
Shouqiang Lai, Chaohsu Lai, Saijun Li, Guolong Chen, Xi Zheng, Tingwei Lu, Zongming Lin, Rongxing Wu, Yijun Lü, Hao‐Chung Kuo, Zhong Chen, Tingzhu Wu
Abstract
In this study, we investigated the temperature-dependent photoluminescence characteristics of green InGaN/GaN multiple quantum wells (MQWs) with InGaN/GaN pre-wells and InGaN pre-layers, and the electroluminescence properties of the corresponding mini-LEDs were fabricated and studied. According to the fitting results of the temperature-dependent photoluminescence spectra obtained by the Vaishini and Arrhenius models, the S-shaped temperature-dependent peak energies of green InGaN/GaN MQWs grown on pre-wells and pre-layers indicated that these peaks originated from the localized state, and better crystal quality could be found in the MQWs with pre-layers. Moreover, we compared the electroluminescence properties of green mini-LEDs. These results demonstrate the advantages of growing green MQWs with an InGaN prelayer.