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dc.contributor.authorYong, Zi-Jun
dc.contributor.authorGuo, Shao-Qiang
dc.contributor.authorMa, Ju-Ping
dc.contributor.authorZhang, Jun-Ying
dc.contributor.authorLi, Zhi-Yong
dc.contributor.authorChen, Ya-Meng
dc.contributor.authorZhang, Bin-Bin
dc.contributor.authorZhou, Yang
dc.contributor.authorShu, Jie
dc.contributor.authorGu, Jia-Li
dc.contributor.authorZheng, Li-Rong
dc.contributor.authorBakr, Osman
dc.contributor.authorSun, Hong-Tao
dc.date.accessioned2019-01-08T05:37:37Z
dc.date.available2019-01-08T05:37:37Z
dc.date.issued2018-07-16
dc.identifier.citationYong Z-J, Guo S-Q, Ma J-P, Zhang J-Y, Li Z-Y, et al. (2018) Doping-Enhanced Short-Range Order of Perovskite Nanocrystals for Near-Unity Violet Luminescence Quantum Yield. Journal of the American Chemical Society 140: 9942–9951. Available: http://dx.doi.org/10.1021/jacs.8b04763.
dc.identifier.issn0002-7863
dc.identifier.issn1520-5126
dc.identifier.doi10.1021/jacs.8b04763
dc.identifier.urihttp://hdl.handle.net/10754/630766
dc.description.abstractAll-inorganic perovskite nanocrystals (NCs) have emerged as a new generation of low-cost semiconducting luminescent system for optoelectronic applications. The room-temperature photoluminescence quantum yields (PLQYs) of these NCs in the green and red spectral range approach unity. However, their PLQYs in the violet are much lower, and an insightful understanding of such poor performance remains missing. We report a general strategy for the synthesis of all-inorganic violet-emitting perovskite NCs with near-unity PLQYs through engineering local order of the lattice by nickel ion doping. A broad range of experimental characterizations, including steady-state and time-resolved luminescence spectroscopy, X-ray absorption spectra, and magic angle spinning nuclear magnetic resonance spectra, reveal that the low PLQY in undoped NCs is associated with short-range disorder of the lattice induced by intrinsic defects such as halide vacancies and that Ni doping can substantially eliminate these defects and result in increased short-range order of the lattice. Density functional theory calculations reveal that Ni doping of perovskites causes an increase of defect formation energy and does not introduce deep trap states in the band gap, which is suggested to be the main reason for the improved local structural order and near-unity PLQY. Our ability to obtain violet-emitting perovskite NCs with near-perfect properties opens the door for a range of applications in violet-emitting perovskite-based devices such as light-emitting diodes, single-photon sources, lasers, and beyond.
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (Grant Nos. 11574225 and 51672106), a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and a project supported by State Key Laboratory of Luminescence and Applications. We thank the staff at the 1W2B beamline at the Beijing Synchrotron Radiation Facility for XAFS measurements.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/pdf/10.1021/jacs.8b04763
dc.rightsThis is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
dc.rightsThis file is an open access version redistributed from: https://pubs.acs.org/doi/pdf/10.1021/jacs.8b04763
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.html
dc.titleDoping-Enhanced Short-Range Order of Perovskite Nanocrystals for Near-Unity Violet Luminescence Quantum Yield
dc.typeArticle
dc.contributor.departmentFunctional Nanomaterials Lab (FuNL)
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of the American Chemical Society
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
dc.contributor.institutionDepartment of Physics, Beihang University, Beijing, 100191, China
dc.contributor.institutionAnalysis and Testing Center, Soochow University, Jiangsu, 215123, China
dc.contributor.institutionBeijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
dc.contributor.institutionState Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
kaust.personZhou, Yang
kaust.personBakr, Osman M.
refterms.dateFOA2020-09-17T12:57:14Z
dc.date.published-online2018-07-16
dc.date.published-print2018-08-08


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