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- W3210160882 abstract "All‐inorganic cesium lead halide perovskite colloidal nanocrystals (NCs) (CsPbX 3 , X = Cl, Br, I) have emerged as potential candidates for next‐generation light‐emitting diodes (LEDs). However, high trap states on the surface of CsPbX 3 NCs caused by ionic nature and dynamic bonding of organic ligands limit the performance of CsPbX 3 NCs‐based LEDs. Herein, a microemulsion (ME)‐modified strategy to decorate CsPbBr 3 NC cores with inorganic PbWO 4 is developed. It is demonstrated that ME‐assisted modification plays a crucial role in bridging the WO 4 2− anion solution and the CsPbBr 3 NC suspension. Compared with pristine CsPbBr 3 NCs, the obtained PbWO 4 ‐modified NCs exhibit improved photoluminescence efficiency. The corresponding NC films also show enhanced stability at elevated temperature and also in humid atmosphere. Consequently, the PbWO 4 ‐modified NCs‐based LED exhibits a pronounced improvement of electroluminescence with an external quantum efficiency from 0.2% to 5.7% and twofold enhancement of the operational lifetime through PbWO 4 passivation in comparison with that of pristine CsPbBr 3 NCs‐based LED. These results show a promising pathway by ME‐induced anionic modification for high‐performance and stable LEDs based on perovskite NCs." @default.
- W3210160882 created "2021-11-08" @default.
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- W3210160882 date "2021-10-23" @default.
- W3210160882 modified "2023-10-18" @default.
- W3210160882 title "Microemulsion‐Induced Stable CsPbBr 3 /PbWO 4 Nanocrystals for Light‐Emitting Diodes" @default.
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- W3210160882 doi "https://doi.org/10.1002/adpr.202100250" @default.
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