Polarity Control and Nanoscale Optical Characterization of AlGaN-Based Multiple-Quantum-Wells for Ultraviolet C Emitters

doi:10.1021/acsanm.0c00706

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Polarity Control and Nanoscale Optical Characterization of AlGaN-Based Multiple-Quantum-Wells for Ultraviolet C Emitters
	Xu, Houqiang ; Jiang, Jie'an ; Dai, Yijun ; Cui, Mei ; Li, Kuang-hui ; Ge, Xiaotian ; Hoo, Jason ; Yan, Long ; Guo, Shiping ; Ning, Jiqiang
刊名	ACS APPLIED NANO MATERIALS
	2020
卷号	3 期号:6 页码:5335-5342
关键词	LIGHT-EMITTING-DIODES GAN GROWTH PARAMETERS WATER
DOI	10.1021/acsanm.0c00706
英文摘要	Optical properties of AlGaN UVC multiple-quantum-wells (MQWs) with nanoscale inverted polarity domains are strongly related to polar surfaces and nanoscale structures. In this work, the impact of pregrowth nitridation of the sapphire substrate on the polarity control of UVC MQW is highlighted, and the optical properties of III- and N-polar domains were distinguished. Nanoscale cathodoluminescence peak separation of more than 30 nm is observed in lateral-polarity-structure (LPS) UVC MQWs, which is ascribed to the potential minima induced by the local variation of QW thickness and Ga enrichment inside N-polar domains. After an AlGaN/AlN superlattice is inserted and the V/III ratio is enhanced during growth, the surface morphology of the N-polar domain is greatly improved, leading to a single-peak emission at a wavelength of 275 nm in both the III- and N-polar domains, and a 10-fold stronger peak intensity at the inversion domain boundary. Such understandings on the polar surface optimization and underlying reasons of peak separation enable rational design for efficient UVC emitters with improved performance.
学科主题	Science & Technology - Other Topics ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20698]
专题	2020专题
作者单位	1.Ye, JC (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China. 2.Guo, W 3.Ye, JC (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Houqiang,Jiang, Jie'an,Dai, Yijun,et al. Polarity Control and Nanoscale Optical Characterization of AlGaN-Based Multiple-Quantum-Wells for Ultraviolet C Emitters[J]. ACS APPLIED NANO MATERIALS,2020,3(6):5335-5342.
APA	Xu, Houqiang.,Jiang, Jie'an.,Dai, Yijun.,Cui, Mei.,Li, Kuang-hui.,...&Ye, Jichun.(2020).Polarity Control and Nanoscale Optical Characterization of AlGaN-Based Multiple-Quantum-Wells for Ultraviolet C Emitters.ACS APPLIED NANO MATERIALS,3(6),5335-5342.
MLA	Xu, Houqiang,et al."Polarity Control and Nanoscale Optical Characterization of AlGaN-Based Multiple-Quantum-Wells for Ultraviolet C Emitters".ACS APPLIED NANO MATERIALS 3.6(2020):5335-5342.