Edge stabilization in reduced-dimensional perovskites

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dc.contributor.authorNa Quan, Li
dc.contributor.authorMa, Dongxin
dc.contributor.authorZhao, Yongbiao
dc.contributor.authorVoznyy, Oleksandr
dc.contributor.authorYuan, Haifeng
dc.contributor.authorBladt, Eva
dc.contributor.authorPan, Jun
dc.contributor.authorGarcía de Arquer, F. Pelayo
dc.contributor.authorSabatini, Randy
dc.contributor.authorPiontkowski, Zachary
dc.contributor.authorEmwas, Abdul-Hamid
dc.contributor.authorTodorović, Petar
dc.contributor.authorQuintero-Bermudez, Rafael
dc.contributor.authorWalters, Grant
dc.contributor.authorFan, James Z.
dc.contributor.authorLiu, Mengxia
dc.contributor.authorTan, Hairen
dc.contributor.authorSaidaminov, Makhsud I.
dc.contributor.authorGao, Liang
dc.contributor.authorLi, Yiying
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorWei, Nini
dc.contributor.authorTang, Jiang
dc.contributor.authorMcCamant, David W.
dc.contributor.authorRoeffaers, Maarten B. J.
dc.contributor.authorBals, Sara
dc.contributor.authorHofkens, Johan
dc.contributor.authorBakr, Osman M.
dc.contributor.authorLu, Zheng-Hong
dc.contributor.authorSargent, Edward H.
dc.date.accessioned2025-01-23T18:38:36Z
dc.date.available2025-01-23T18:38:36Z
dc.date.issued2020
dc.description.abstractReduced-dimensional perovskites are attractive light-emitting materials due to their efficient luminescence, color purity, tunable bandgap, and structural diversity. A major limitation in perovskite light-emitting diodes is their limited operational stability. Here we demonstrate that rapid photodegradation arises from edge-initiated photooxidation, wherein oxidative attack is powered by photogenerated and electrically-injected carriers that diffuse to the nanoplatelet edges and produce superoxide. We report an edge-stabilization strategy wherein phosphine oxides passivate unsaturated lead sites during perovskite crystallization. With this approach, we synthesize reduced-dimensional perovskites that exhibit 97±3% photoluminescence quantum yields and stabilities that exceed 300 h upon continuous illumination in an air ambient. We achieve green-emitting devices with a peak external quantum efficiency (EQE) of 14% at 1000 cd m2; their maximum luminance is 4.5×104 cd m2 (corresponding to an EQE of 5%); and, at 4000 cd m2, they achieve an operational half-lifetime of 3.5 h.
dc.description.reviewstatusReviewed
dc.description.scholarlevelFaculty
dc.description.sponsorshipThis publication is based in part on work supported by an award (KUS-11-009-21) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, by the Ontario Research Fund (ORF), by the Natural Sciences and Engineering Research Council (NSERC) of Canada, and by the US Department of Navy, Office of Naval Research (Grant Award No. N00014-17-1-2524). H.Y. acknowledges the Research Foundation-Flanders (FWO Vlaanderen) for a postdoctoral fellowship. E.B. gratefully acknowledges financial support by the Research Foundation-Flanders (FWO Vlaanderen). S.B. acknowledges financial support from European Research Council (ERC Starting Grant #815128-REALNANO). M.B.J.R. and J.H. acknowledge the Research Foundation-Flanders (FWO, Grants G.0962.13, G.0B39.15, AKUL/11/14 and G0H6316N), KU Leuven Research Fund (C14/15/053) and the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement No. [307523], ERC-Stg LIGHT to M.B.J.R. DFT calculations were performed on the IBM BlueGene Q supercomputer with support from the Southern Ontario Smart Computing Innovation Platform (SOSCIP). M.I.S. acknowledges the Banting Postdoctoral Fellowship program from the Natural Sciences and Engineering Research Council of Canada (NSERC). H.T. acknowledges the Netherlands Organisation for Scientific Research (NWO) for a Rubicon grant (680-50-1511).
dc.identifier.citationQuan, L. N., Ma, D., Zhao, Y., Voznyy, O., Yuan, H., Bladt, E., Pan, J., De Arquer, F. P. G., Sabatini, R., Piontkowski, Z., Emwas, A., Todorović, P., Quintero-Bermudez, R., Walters, G., Fan, J. Z., Liu, M., Tan, H., Saidaminov, M. I., Gao, L., . . . Sargent, E. H. (2020). Edge stabilization in reduced-dimensional perovskites. Nature Communications, 11(1). https://doi.org/10.1038/s41467-019-13944-2
dc.identifier.urihttps://doi.org/10.1038/s41467-019-13944-2
dc.identifier.urihttps://hdl.handle.net/1828/20992
dc.language.isoen
dc.publisherNature Communications
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.departmentDepartment of Chemistry
dc.subject.departmentDepartment of Electrical and Computer Engineering
dc.titleEdge stabilization in reduced-dimensional perovskites
dc.typeArticle

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