Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 김영훈 | - |
dc.date.accessioned | 2022-10-19T05:32:35Z | - |
dc.date.available | 2022-10-19T05:32:35Z | - |
dc.date.issued | 2021-01 | - |
dc.identifier.citation | NATURE PHOTONICS, v. 15, no. 2, page. 148-155 | en_US |
dc.identifier.issn | 1749-4885; 1749-4893 | en_US |
dc.identifier.uri | https://www.nature.com/articles/s41566-020-00732-4 | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/175541 | - |
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. | en_US |
dc.description.sponsorship | This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2016R1A3B1908431). A.K., R.B.W., and A.M.R. acknowledge the support of the US Department of Energy, Office of Basic Energy Sciences, under grant no. DE-SC0019281 and also the computational support from NERSC of the DOE. P.T. acknowledges the scholarship from Chinese Scholarship Council (CSC). H.J.B. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 834431) and the Spanish Ministry of Economy and Competitiveness (MINECO) via the Unidad de Excelencia Maria de Maeztu CEX2019000919-M and MAT2017-88821-R. A.S., S.N. and R.H.F. acknowledge support from the UKRI Global Challenge Research Fund project, SUNRISE (EP/P032591/1) and UKIERI projects. S.N. acknowledges funding and support from Royal Society-SERB Newton International Fellowship. | en_US |
dc.language.iso | en | en_US |
dc.publisher | NATURE RESEARCH | en_US |
dc.title | Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1038/s41566-020-00732-4 | en_US |
dc.relation.journal | NATURE PHOTONICS | - |
dc.contributor.googleauthor | Kim, Young-Hoon | - |
dc.contributor.googleauthor | Kim, Sungjin | - |
dc.contributor.googleauthor | Kakekhani, Arvin | - |
dc.contributor.googleauthor | Park, Jinwoo | - |
dc.contributor.googleauthor | Park, Jaehyeok | - |
dc.contributor.googleauthor | Lee, Yong-Hee | - |
dc.contributor.googleauthor | Xu, Hengxing | - |
dc.contributor.googleauthor | Nagane, Satyawan | - |
dc.contributor.googleauthor | Wexler, Robert B. | - |
dc.contributor.googleauthor | Kim, Dong-Hyeok | - |
dc.relation.code | 2021005355 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | younghoonkim | - |
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