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Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes
DC Field | Value | Language |
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dc.contributor.author | Kim, Young-Hoon | - |
dc.contributor.author | Kim, Sungjin | - |
dc.contributor.author | Kakekhani, Arvin | - |
dc.contributor.author | Park, Jinwoo | - |
dc.contributor.author | Park, Jaehyeok | - |
dc.contributor.author | Lee, Yong-Hee | - |
dc.contributor.author | Xu, Hengxing | - |
dc.contributor.author | Nagane, Satyawan | - |
dc.contributor.author | Wexler, Robert B. | - |
dc.contributor.author | Kim, Dong-Hyeok | - |
dc.contributor.author | Jo, Seung Hyeon | - |
dc.contributor.author | Martinez-Sarti, Laura | - |
dc.contributor.author | Tan, Peng | - |
dc.contributor.author | Sadhanala, Aditya | - |
dc.contributor.author | Park, Gyeong-Su | - |
dc.contributor.author | Kim, Young-Woon | - |
dc.contributor.author | Hu, Bin | - |
dc.contributor.author | Bolink, Henk J. | - |
dc.contributor.author | Yoo, Seunghyup | - |
dc.contributor.author | Friend, Richard H. | - |
dc.contributor.author | Rappe, Andrew M. | - |
dc.contributor.author | Lee, Tae-Woo | - |
dc.date.accessioned | 2022-04-20T11:35:17Z | - |
dc.date.available | 2022-04-20T11:35:17Z | - |
dc.date.created | 2021-03-15 | - |
dc.date.created | 2021-03-15 | - |
dc.date.created | 2021-03-15 | - |
dc.date.issued | 2021-02 | - |
dc.identifier.citation | Nature Photonics, Vol.15 No.2, pp.148-155 | - |
dc.identifier.issn | 1749-4885 | - |
dc.identifier.other | 125557 | - |
dc.identifier.uri | https://hdl.handle.net/10371/179124 | - |
dc.description.abstract | Electroluminescence 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.language | 영어 | - |
dc.publisher | Nature Pub. Group | - |
dc.title | Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 이태우 | - |
dc.identifier.doi | 10.1038/s41566-020-00732-4 | - |
dc.citation.journaltitle | Nature Photonics | - |
dc.identifier.wosid | 000604898500002 | - |
dc.identifier.scopusid | 2-s2.0-85098669368 | - |
dc.citation.endpage | 155 | - |
dc.citation.number | 2 | - |
dc.citation.startpage | 148 | - |
dc.citation.volume | 15 | - |
dc.identifier.sci | 000604898500002 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Kim, Young-Woon | - |
dc.contributor.affiliatedAuthor | Lee, Tae-Woo | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | HALIDE PEROVSKITES | - |
dc.subject.keywordPlus | STABILIZATION | - |
dc.subject.keywordPlus | CH3NH3PBBR3 | - |
dc.subject.keywordPlus | BINDING | - |
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