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dc.contributor.authorYin, Jun
dc.contributor.authorNaphade, Rounak
dc.contributor.authorGutiérrez Arzaluz, Luis
dc.contributor.authorBrédas, Jean-Luc
dc.contributor.authorBakr, Osman M.
dc.contributor.authorMohammed, Omar F.
dc.date.accessioned2020-07-07T17:24:31Z
dc.date.available2020-07-07T17:24:31Z
dc.date.issued2020-05-28
dc.identifier.citationACS Energy Lett. 2020, 5, XXX, 2149–2155en_US
dc.identifier.issn2380-8195
dc.identifier.doi10.1021/acsenergylett.0c01047
dc.identifier.urihttp://hdl.handle.net/10150/641811
dc.description.abstractTwo-dimensional (2D) Ruddlesden–Popper (RP) perovskites are emerging materials for light-emitting applications. Unfortunately, their desirable narrowband emission coexists with broadband emissions, which limits the color quality and performance of the light source. However, the origin of such broadband emission in ⟨100⟩-oriented perovskites is still under debate. Here, we experimentally and theoretically demonstrate that unlike ⟨110⟩-oriented RP perovskites, the broadband emission of the 2D ⟨100⟩-oriented RP (PEA)2PbI4 (PEA = C6H5C2H4NH3+) perovskites originates from defect-related luminescence centers. We find that the broadband emission of this prototype 2D structure can be largely suppressed by using excess PEAI treatment. Density functional theory (DFT) calculations indicate that iodine (I) vacancies both in the bulk and on the surface are responsible for the broadband emission. We attribute the decreased broadband emission after PEAI treatment to the passivation of both undercoordinated Pb2+ ions on the surface and I vacancies in the bulk through I– ion migration.en_US
dc.language.isoenen_US
dc.publisherAMER CHEMICAL SOCen_US
dc.rightsCopyright © 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleModulation of Broadband Emissions in Two-Dimensional ⟨100⟩-Oriented Ruddlesden–Popper Hybrid Perovskitesen_US
dc.typeArticleen_US
dc.identifier.eissn2380-8195
dc.contributor.departmentUniv Arizona, Dept Chem & Biochemen_US
dc.identifier.journalACS Energy Lettersen_US
dc.description.noteOpen access articleen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleACS Energy Letters
dc.source.beginpage2149
dc.source.endpage2155
refterms.dateFOA2020-07-07T17:24:33Z


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Copyright © 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License.
Except where otherwise noted, this item's license is described as Copyright © 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License.