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

2016; Volume: 28; Issue: 39 Linguagem: Inglês

10.1002/adma.201600784

1521-4095

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

Organic Light-Emitting Diodes Research

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-pair-capped quantum dots exhibit high external quantum efficiencies compared with the untreated QDs.