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

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• 作者：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 N. Hedhili ; Omar F. Mohammed ; Zheng Hong Lu ; Dong Ha Kim ; Edward H. Sargent and Osman M. Bakr
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：October 19, 2016
• 年：2016
• 卷：28
• 期：39
• 页码：8718-8725
• 全文大小：1716K
• ISSN：1521-4095

文摘

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.