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Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes

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dc.contributor.authorKim, Young-Hoon-
dc.contributor.authorKim, Sungjin-
dc.contributor.authorKakekhani, Arvin-
dc.contributor.authorPark, Jinwoo-
dc.contributor.authorPark, Jaehyeok-
dc.contributor.authorLee, Yong-Hee-
dc.contributor.authorXu, Hengxing-
dc.contributor.authorNagane, Satyawan-
dc.contributor.authorWexler, Robert B.-
dc.contributor.authorKim, Dong-Hyeok-
dc.contributor.authorJo, Seung Hyeon-
dc.contributor.authorMartinez-Sarti, Laura-
dc.contributor.authorTan, Peng-
dc.contributor.authorSadhanala, Aditya-
dc.contributor.authorPark, Gyeong-Su-
dc.contributor.authorKim, Young-Woon-
dc.contributor.authorHu, Bin-
dc.contributor.authorBolink, Henk J.-
dc.contributor.authorYoo, Seunghyup-
dc.contributor.authorFriend, Richard H.-
dc.contributor.authorRappe, Andrew M.-
dc.contributor.authorLee, Tae-Woo-
dc.date.accessioned2022-04-20T11:35:17Z-
dc.date.available2022-04-20T11:35:17Z-
dc.date.issued2021-02-
dc.identifier.citationNature Photonics, Vol.15 No.2, pp.148-+-
dc.identifier.issn1749-4885-
dc.identifier.other125557-
dc.identifier.urihttps://hdl.handle.net/10371/179124-
dc.description.abstractElectroluminescence efficiencies of metal halide perovskite nanocrystals (PNCs) are limited by a lack of material strategies that can both suppress the formation of defects and enhance the charge carrier confinement. Here we report a one-dopant alloying strategy that generates smaller, monodisperse colloidal particles (confining electrons and holes, and boosting radiative recombination) with fewer surface defects (reducing non-radiative recombination). Doping of guanidinium into formamidinium lead bromide PNCs yields limited bulk solubility while creating an entropy-stabilized phase in the PNCs and leading to smaller PNCs with more carrier confinement. The extra guanidinium segregates to the surface and stabilizes the undercoordinated sites. Furthermore, a surface-stabilizing 1,3,5-tris(bromomethyl)-2,4,6-triethylbenzene was applied as a bromide vacancy healing agent. The result is highly efficient PNC-based light-emitting diodes that have current efficiency of 108 cd A(-1) (external quantum efficiency of 23.4%), which rises to 205 cd A(-1) (external quantum efficiency of 45.5%) with a hemispherical lens.-
dc.titleComprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes-
dc.typeArticle-
dc.contributor.AlternativeAuthor이태우-
dc.identifier.doi10.1038/s41566-020-00732-4-
dc.citation.journaltitleNature Photonics-
dc.identifier.scopusid2-s2.0-85098669368-
dc.citation.endpage+-
dc.citation.number2-
dc.citation.startpage148-
dc.citation.volume15-
dc.identifier.urlhttps://www.nature.com/articles/s41566-020-00732-4-
dc.identifier.rimsid125557-
dc.identifier.sci000604898500002-
dc.description.isOpenAccessY-
dc.contributor.affiliatedAuthorLee, Tae-Woo-
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