50-Fold EQE Improvement up to 6.27% of Solution-Processed All-Inorganic Perovskite CsPbBr₃ QLEDs via Surface Ligand Density Control

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• 作者：Jianhai Li ; Leimeng Xu ; Tao Wang ; Jizhong Song ; Jiawei Chen ; Jie Xue ; Yuhui Dong ; Bo Cai ; Qingsong Shan ; Boning Han and Haibo Zeng
• 刊名：Advanced Materials
• 出版年：2017
• 出版时间：February 2, 2017
• 年：2017
• 卷：29
• 期：5
• 全文大小：3200K
• ISSN：1521-4095

文摘

Solution-processed CsPbBr₃ quantum-dot light-emitting diodes with a 50-fold external quantum efficiency improvement (up to 6.27%) are achieved through balancing surface passivation and carrier injection via ligand density control (treating with hexane/ethyl acetate mixed solvent), which induces the coexistence of high levels of ink stability, photoluminescence quantum yields, thin-film uniformity, and carrier-injection efficiency.