High Hole Injection for Nitrogen-Polarity AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes

High hole injection is desired for improving the performance of AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs). In this work, we adopted a compositionally graded p-Al y1 Ga 1-y1 N/Al 0.85 Ga 0.15 N superlattice (SL) structure in a nitrogen-polarity DUV LED. Our numerical simulation...

Full description

Saved in:
Bibliographic Details
Published in:IEEE electron device letters 2023-07, Vol.44 (7), p.1-1
Main Authors: Deng, Gaoqiang, Zhang, Lidong, Niu, Yunfei, Yu, Jiaqi, Ma, Haotian, Yang, Shixu, Zuo, Changcai, Qian, Haotian, Duan, Bin, Zhang, Baolin, Zhang, Yuantao
Format: Article
Language:English
Subjects:
AlGaN
Aluminum gallium nitride
diode
hole injection
Light emitting diodes
Nitrogen
Power consumption
Quantum efficiency
Quantum well devices
Resistance
Superlattices
ultraviolet
Ultraviolet radiation
Voltage
Wide band gap semiconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High hole injection is desired for improving the performance of AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs). In this work, we adopted a compositionally graded p-Al y1 Ga 1-y1 N/Al 0.85 Ga 0.15 N superlattice (SL) structure in a nitrogen-polarity DUV LED. Our numerical simulation results show that this SL structure is very beneficial to the hole injection into the active region, and leads to a low turn-on voltage and device resistance. This is significant because a low device resistance means a low power consumption and a high wall-plug efficiency. Meanwhile, a DUV LED with compositionally graded SL has a peak internal quantum efficiency (72%) that is much higher than that of the reference DUV LED without an SL (56%). This work provides an attractive approach to effectively injecting holes into the active region of a nitrogen-polarity AlGaN-based DUV LED.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2023.3279450