Hole transport manipulation to improve the hole injection for deep ultraviolet light-emitting diodes

ZH Zhang, SW Huang Chen, Y Zhang, L Li… - Acs …, 2017 - ACS Publications
In this report, we propose to enhance the hole injection efficiency by adjusting the barrier
height of the p-type electron blocking layer (p-EBL) for∼ 273 nm deep ultraviolet light …

Increasing the hole energy by grading the alloy composition of the p-type electron blocking layer for very high-performance deep ultraviolet light-emitting diodes

ZH Zhang, J Kou, SWH Chen, H Shao, J Che… - Photonics …, 2019 - opg.optica.org
It is well known that the p-type AlGaN electron blocking layer (p-EBL) can block hole
injection for deep ultraviolet light-emitting diodes (DUV LEDs). The polarization induced …

Roles of V-shaped pits on the improvement of quantum efficiency in InGaN/GaN multiple quantum well light-emitting diodes

Z Quan, L Wang, C Zheng, J Liu, F Jiang - Journal of Applied Physics, 2014 - pubs.aip.org
The roles of V-shaped pits on the improvement of quantum efficiency in InGaN/GaN multiple
quantum well (MQW) light-emitting diodes are investigated by numerical simulation. The …

[HTML][HTML] Improving hole injection from p-EBL down to the end of active region by simply playing with polarization effect for AlGaN based DUV light-emitting diodes

D Zhang, C Chu, K Tian, J Kou, W Bi, Y Zhang… - AIP Advances, 2020 - pubs.aip.org
In this work, we simply take advantage of the polarization effect to efficiently improve the
hole injection from the p-type electron blocking layer (p-EBL) to the end of the active region …

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 …

High performance of AlGaN deep-ultraviolet light emitting diodes due to improved vertical carrier transport by delta-accelerating quantum barriers

J Lang, FJ Xu, WK Ge, BY Liu, N Zhang, YH Sun… - Applied Physics …, 2019 - pubs.aip.org
AlGaN-based deep-ultraviolet light emitting diodes adopting an embedded delta-AlGaN thin
layer with an Al composition higher than that in conventional barriers have been …

UVA light-emitting diode grown on Si substrate with enhanced electron and hole injections

ZH Zhang, C Chu, CH Chiu, TC Lu, L Li, Y Zhang… - Optics Letters, 2017 - opg.optica.org
In this work, III-nitride based∼ 370 nm UVA light-emitting diodes (LEDs) grown on Si
substrates are demonstrated. We also reveal the impact of the AlN composition in the AlGaN …

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 …

A hole accelerator for InGaN/GaN light-emitting diodes

ZH Zhang, W Liu, ST Tan, Y Ji, L Wang, B Zhu… - Applied Physics …, 2014 - pubs.aip.org
The quantum efficiency of InGaN/GaN light-emitting diodes (LEDs) has been significantly
limited by the insufficient hole injection, and this is caused by the inefficient p-type doping …

Polarization self-screening in [0001] oriented InGaN/GaN light-emitting diodes for improving the electron injection efficiency

ZH Zhang, W Liu, Z Ju, S Tiam Tan, Y Ji… - Applied Physics …, 2014 - pubs.aip.org
InGaN/GaN light-emitting diodes (LEDs) grown along the [0001] orientation inherit very
strong polarization induced electric fields. This results in a reduced effective conduction …