A review on the low external quantum efficiency and the remedies for GaN-based micro-LEDs

S Hang, CM Chuang, Y Zhang, C Chu… - Journal of Physics D …, 2021 - iopscience.iop.org
GaN-based micro-size light-emitting diode (μLED) have emerged as a promising light
sources for a wide range of applications in displays, visible light communication etc. In …

Impact of the surface recombination on InGaN/GaN-based blue micro-light emitting diodes

J Kou, CC Shen, H Shao, J Che, X Hou, C Chu… - Optics express, 2019 - opg.optica.org
In this work, the size-dependent effect for InGaN/GaN-based blue micro-light emitting diodes
(µLEDs) is numerically investigated. Our results show that the external quantum efficiency …

InGaN/GaN light-emitting diode with a polarization tunnel junction

ZH Zhang, S Tiam Tan, Z Kyaw, Y Ji, W Liu, Z Ju… - Applied Physics …, 2013 - pubs.aip.org
We report InGaN/GaN light-emitting diodes (LED) comprising in situ integrated p+-
GaN/InGaN/n+-GaN polarization tunnel junctions. Improved current spreading and carrier …

Promoted Hole Transport Capability by Improving Lateral Current Spreading for High‐Efficiency Quantum Dot Light‐Emitting Diodes

Q Wu, F Cao, H Wang, J Kou, ZH Zhang… - Advanced …, 2020 - Wiley Online Library
Carrier imbalance resulting from stronger electron injection from ZnO into quantum‐dot (QD)
emissive layer than hole injection is one critical issue that constrains the performance of …

Self-screening of the quantum confined Stark effect by the polarization induced bulk charges in the quantum barriers

ZH Zhang, W Liu, Z Ju, S Tiam Tan, Y Ji, Z Kyaw… - Applied Physics …, 2014 - pubs.aip.org
InGaN/GaN light-emitting diodes (LEDs) grown along the polar orientations significantly
suffer from the quantum confined Stark effect (QCSE) caused by the strong polarization …

The impacts of sidewall passivation via atomic layer deposition on GaN-based flip-chip blue mini-LEDs

S Lai, W Lin, J Chen, T Lu, S Liu, Y Lin… - Journal of Physics D …, 2022 - iopscience.iop.org
In order to investigate the photoelectric characteristics of 80× 120 µm 2 mini-light-emitting-
diodes (mini-LEDs) with sidewall passivation by atomic layer deposition (ALD), this paper …

On the electric-field reservoir for III-nitride based deep ultraviolet light-emitting diodes

ZH Zhang, L Li, Y Zhang, F Xu, Q Shi, B Shen, W Bi - Optics express, 2017 - opg.optica.org
The drift velocity for holes is strongly influenced by the electric field in the p-type hole
injection layer for III-nitride based deep ultraviolet light-emitting diodes (DUV LEDs). In this …

Green InGaN/GaN multiple-quantum-wells with pre-layer for high-efficiency mini-LEDs

S Lai, C Lai, S Li, G Chen, X Zheng, T Lu… - IEEE Electron …, 2023 - ieeexplore.ieee.org
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 …

Calculating the effect of AlGaN dielectric layers in a polarization tunnel junction on the performance of AlGaN-based deep-ultraviolet light-emitting diodes

Y Wang, Z Zhang, L Guo, Y Chen, Y Li, Z Qi, J Ben… - Nanomaterials, 2021 - mdpi.com
In this work, AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs) with AlGaN as
the dielectric layers in p+-Al0. 55Ga0. 45N/AlGaN/n+-Al0. 55Ga0. 45N polarization tunnel …

InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination

ZH Zhang, W Liu, Z Ju, ST Tan, Y Ji, Z Kyaw… - Applied Physics …, 2014 - pubs.aip.org
In conventional InGaN/GaN light-emitting diodes (LEDs), thin InGaN quantum wells are
usually adopted to mitigate the quantum confined Stark effect (QCSE), caused due to strong …