Highly Efficient Perovskite-Quantum-Dot Light-Emitting Diodes by Surface Engineering

Jun Pan, Li Na Quan, Yongbiao Zhao, Wei Peng, Murali Banavoth, Smritakshi P. Sarmah, Mingjian Yuan, Lutfan Sinatra, Noktan Mohammed AlYami, Jiakai Liu, Emre Yassitepe, Zhenyu Yang, Oleksandr Voznyy, Riccardo Comin, Mohamed N. Hedhili, Omar F. Mohammed, Zheng Hong Lu, Dong Ha Kim, Edward H. Sargent, Osman Bakr

Research output: Contribution to journalArticlepeer-review

923 Scopus citations

Abstract

A two-step ligand-exchange strategy is developed, in which the long-carbon-chain ligands on all-inorganic perovskite (CsPbX3, X = Br, Cl) quantum dots (QDs) are replaced with halide-ion-pair ligands. Green and blue light-emitting diodes made from the halide-ion-paircapped quantum dots exhibit high external quantum efficiencies compared with the untreated QDs.
Original languageEnglish (US)
Pages (from-to)8718-8725
Number of pages8
JournalAdvanced Materials
Volume28
Issue number39
DOIs
StatePublished - Aug 16 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-11-009-21, URF/1/2268-01-01
Acknowledgements: J.P., L.N.Q., and Y.Z. contributed equally to this work. This publication is based in part on Awards KUS-11-009-21 and URF/1/2268-01-01 made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. L. N. Quan and D. H. Kim acknowledge the financial support by the National Research Foundation of Korea Grant funded by the Korean Government (Grant No. 2014R1A2A1A09005656). The authors acknowledge Mrs. Nini Wei and Dr. Jun Li for TEM cross-sections.

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