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High-Brightness Perovskite Light-Emitting Diodes Based on FAPbBr(3) Nanocrystals with Rationally Designed Aromatic Ligands
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Univ Elect Sci & Technol China, Peoples R China.ORCID iD: 0000-0001-9039-7811
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Jinan Univ, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering. Zhejiang Univ, Peoples R China.ORCID iD: 0000-0001-7623-686X
Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
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2021 (English)In: ACS Energy Letters, E-ISSN 2380-8195, Vol. 6, no 7, p. 2395-2403Article in journal (Refereed) Published
Abstract [en]

Despite rapid developments of light-emitting diodes (LEDs) based on emerging perovskite nanocrystals (PeNCs), it remains challenging to achieve devices with integrated high efficiencies and high brightness because of the insulating long-chain ligands used for the PeNCs. Herein, we develop highly luminescent and stable formamidinium lead bromide PeNCs capped with rationally designed short aromatic ligands of 2-naphthalenesulfonic acid (NSA) for LEDs. Compared with commonly used oleic acid ligands, the NSA molecules not only preserve the surface properties of the PeNCs during the purification but also notably improve the electrical properties of the assembled emissive layers, ensuring efficient charge injection/transport in the devices. The resulting champion LED with electroluminescence approaching the Rec. 2020 green primary color demonstrates a high brightness of 67 115 cd cm(-2) and a peak external quantum efficiency of 19.2%. More impressively, the device shows negligibly decreased efficiency at an elevated brightness of 20 000 cd cm(-2) and a well-retained efficiency of over 10% at around 65 000 cd cm(-2), presenting a breakthrough in LEDs based on PeNCs.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2021. Vol. 6, no 7, p. 2395-2403
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-179990DOI: 10.1021/acsenergylett.1c00812ISI: 000672746800005OAI: oai:DiVA.org:liu-179990DiVA, id: diva2:1601448
Note

Funding Agencies|National Key R&D Program of China [2017YFA0207400]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [61604032, 61905037]; Fundamental Research Funds for the Central Universities of ChinaFundamental Research Funds for the Central Universities [ZYGX2016J206]; Guangdong Basic and Applied Basic Research Foundation [2020A1515110384]; NSFCNational Natural Science Foundation of China (NSFC) [61774077]; Key Projects of Joint Fund of Basic and Applied Basic Research Fund of Guangdong Province [2019B1515120073]; Swedish Research Council VetenskapsradetSwedish Research Council [2020-03564]; ERC Starting GrantEuropean Research Council (ERC) [717026]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]

Available from: 2021-10-08 Created: 2021-10-08 Last updated: 2021-12-28

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Zhao, HaifengChen, HongtingBai, SaiKuang, ChaoyangLuo, XiyuTeng, PengpengYin, ChunyangGao, Feng
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Biomolecular and Organic ElectronicsFaculty of Science & EngineeringElectronic and photonic materials
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