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

• Published in: Advanced materials (Weinheim) Vol. 28; no. 39; pp. 8718 - 8725
• Main Authors: Pan, Jun, Quan, Li Na, Zhao, Yongbiao, Peng, Wei, Murali, Banavoth, Sarmah, Smritakshi P., Yuan, Mingjian, Sinatra, Lutfan, Alyami, Noktan M., Liu, Jiakai, Yassitepe, Emre, Yang, Zhenyu, Voznyy, Oleksandr, Comin, Riccardo, Hedhili, Mohamed N., Mohammed, Omar F., Lu, Zheng Hong, Kim, Dong Ha, Sargent, Edward H., Bakr, Osman M.
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.10.2016
• Subjects: Chains; CsPbBr3; external quantum efficiency; Ligands; Light-emitting diodes; perovskite; Perovskites; Quantum dots; Quantum efficiency; Strategy; quantum dots; CsPbBr3; external quantum efficiency; perovskite; light-emitting diodes

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...