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dc.contributor.authorXu, Houqiang
dc.contributor.authorJiang, Jie'an
dc.contributor.authorDai, Yijun
dc.contributor.authorCui, Mei
dc.contributor.authorLi, Kuang-Hui
dc.contributor.authorGe, Xiaotian
dc.contributor.authorHoo, Jason
dc.contributor.authorYan, Long
dc.contributor.authorGuo, Shiping
dc.contributor.authorNing, Jiqiang
dc.contributor.authorSun, Haiding
dc.contributor.authorSarkar, Biplab
dc.contributor.authorGuo, Wei
dc.contributor.authorYe, Jichun
dc.date.accessioned2020-05-12T10:38:09Z
dc.date.available2020-05-12T10:38:09Z
dc.date.issued2020-05-06
dc.identifier.citationXu, H., Jiang, J., Dai, Y., Cui, M., Li, K., Ge, X., … Ye, J. (2020). Polarity Control and Nanoscale Optical Characterization of AlGaN-based Multiple Quantum Wells for Ultraviolet C emitters. ACS Applied Nano Materials. doi:10.1021/acsanm.0c00706
dc.identifier.issn2574-0970
dc.identifier.issn2574-0970
dc.identifier.doi10.1021/acsanm.0c00706
dc.identifier.urihttp://hdl.handle.net/10754/662808
dc.description.abstractOptical properties of AlGaN UVC multiple-quantum-wells (MQWs) with nanoscale inverted polarity domains are strongly related to the polar surfaces and nanoscale structures. In this work, the impact of pre-growth 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 local variation of QW thickness and Ga enrichment inside N-polar domains. After inserting an AlGaN/AlN superlattice and enhancing V/III ratio during growth, the surface morphology of N-polar domain is greatly improved, leading to a single peak emission at wavelength of 275 nm in both III- and N-polar domains, and 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.
dc.description.sponsorshipThis work was supported by National Key Research and Development Program of China (2016YFB0400802), National Natural Science Foundation of China (61974149, 61704176), Key Research and Development Program of Zhejiang Province (2019C01080, 2020C01145), and Ningbo Innovation 2025 Major Project (2018B10088, 2019B10121).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsanm.0c00706
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.0c00706.
dc.titlePolarity Control and Nanoscale Optical Characterization of AlGaN-based Multiple Quantum Wells for Ultraviolet C emitters
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalACS Applied Nano Materials
dc.eprint.versionPost-print
dc.contributor.institutionNingbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang, China.
dc.contributor.institutionUniversity of Chinese Academy of Sciences, Beijing, 100049, China.
dc.contributor.institutionVacuum Interconnected, Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Suzhou, 215123, Jiangsu, China.
dc.contributor.institutionAdvanced Micro-Fabrication Equipment Inc. Shanghai, 201201, China.
dc.contributor.institutionSchool of Microelectronics, University of Science and Technology of China, Hefei, 230026, Anhui, China.
dc.contributor.institutionDepartment of Electronics and Communication Engineering, IIT Roorkee, Roorkee, Uttarakhand 247667, India
kaust.personLi, Kuang-Hui
refterms.dateFOA2020-05-12T10:39:03Z
dc.date.published-online2020-05-06
dc.date.published-print2020-06-26


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