Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

GaN/AlN quantum-disk nanorod 280 nm deep ultraviolet light emitting diodes by molecular beam epitaxy

Abstract

We report optically and electrically pumped ${\sim}{280}\,\,{\rm nm}$ deep ultraviolet (DUV) light emitting diodes (LEDs) with ultra-thin GaN/AlN quantum disks (QDs) inserted into AlGaN nanorods by selective epitaxial regrowth using molecular beam epitaxy. The GaN/AlN QD LED has shown strong DUV emission distribution on the ordered nanorods and high internal quantum efficiency of 81.2%, as a result of strain release and reduced density of threading dislocations revealed by transmission electron microscopy. Nanorod assembly suppresses the lateral guiding mode of light, and light extraction efficiency can be increased from 14.9% for planar DUV LEDs to 49.6% for nanorod DUV LEDs estimated by finite difference time domain simulations. Presented results offer the potential to solve the issue of external quantum efficiency limitation of DUV LED devices.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Deep ultraviolet light-emitting diodes based on a well-ordered AlGaN nanorod array

Liang Zhang, Yanan Guo, Jianchang Yan, Qingqing Wu, Yi Lu, Zhuohui Wu, Wen Gu, Xuecheng Wei, Junxi Wang, and Jinmin Li
Photon. Res. 7(9) B66-B72 (2019)

Effect of the AlN strain compensation layer on InGaN quantum well red-light-emitting diodes beyond epitaxy

Zhiyuan Liu, Mingtao Nong, Yi Lu, Haicheng Cao, Saravanan Yuvaraja, Na Xiao, Zahrah Alnakhli, Raul Ricardo Aguileta Vázquez, and Xiaohang Li
Opt. Lett. 47(23) 6229-6232 (2022)

Local dielectric tunnel junction to manage the current distribution for AlGaN-based deep-ultraviolet light-emitting diodes with a thin p-GaN layer

Qingqing Li, Chunshuang Chu, Weidong Wang, Jiamang Che, Hua Shao, Qianqian Liu, Yonghui Zhang, and Zi-hui Zhang
Opt. Lett. 47(14) 3475-3478 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved