Superlattice hole injection layers for UV LEDs grown on SiC

doi:10.1364/OME.398146

	Superlattice hole injection layers for UV LEDs grown on SiC
	Zollner, Christian J.; Almogbel, Abdullah S.; Yao, Yifan; Wang, Michael; Iza, Michael; Speck, James S.; DenBaars, Steven P.; Nakamura, Shuji
	2020-09
发表期刊	OPTICAL MATERIALS EXPRESS
ISSN	2159-3930
摘要	AlGaN-based germicidal UV LEDs show promise in lighting the COVID-19 pandemic through disinfection of air, water, and surfaces. We report UV LEDs grown by MOCVD on SiC substrates, fabricated into thin-film flip chip devices. Replacing the uniform p-AlxGa1-xN layer (x = 0.2) with a short-period-superlattice of alternating (x = 0.1 and 0.8) Al-composition improved EQE from 1.3% to 2.7% (3.2% with encapsulation) at 20 A/cm(2). Peak EQE and WPE values of 4.8% and 2.8% (287 nm) were measured at current densities below 2 A/cm(2), and maximum output power of 7.4 mW (76 mW/mm(2)) was achieved at 284 nm. Further WPE improvements are expected with both superlattice and uniform layer optimization, improved p-contact metallization, and active region optimization. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI	10.1364/OME.398146
WOS关键词	DISINFECTION ; TEMPERATURE ; NITRIDE ; DENSITY
WOS研究方向	Materials Science ; Optics
WOS类目	Materials Science, Multidisciplinary ; Optics
出版者	OPTICAL SOC AMER
引用统计
文献类型	期刊论文
专题	新冠肺炎循证社会科学证据集成
作者单位	Univ Calif Santa Barbara
推荐引用方式 GB/T 7714	Zollner, Christian J.,Almogbel, Abdullah S.,Yao, Yifan,et al. Superlattice hole injection layers for UV LEDs grown on SiC[J]. OPTICAL MATERIALS EXPRESS,2020.
APA	Zollner, Christian J..,Almogbel, Abdullah S..,Yao, Yifan.,Wang, Michael.,Iza, Michael.,...&Nakamura, Shuji.(2020).Superlattice hole injection layers for UV LEDs grown on SiC.OPTICAL MATERIALS EXPRESS.
MLA	Zollner, Christian J.,et al."Superlattice hole injection layers for UV LEDs grown on SiC".OPTICAL MATERIALS EXPRESS (2020).