Abstract Perovskite nanocrystals (NCs) are promising emissive materials for application in light-emitting diodes (LEDs) due to their high quantum efficiency and narrow full width at half maximum (FWHM). However, the ion bonding character of perovskite leads to their quick chemical decomposition under atmospheric moisture. Herein, we present CsPbBr3 perovskite NCs that achieved improved efficiency and stability with the addition of water during the synthesis process. The CsPbBr3 NCs synthesized with a controlled amount of water exhibited a quantum yield greater than 90%, sustained stability over 35 days and a much narrower FWHM than CsPbBr3 NCs that did not use water. Finally, water-added perovskite NC LEDs were fabricated and they showed a nearly 5-times improvement in current efficiency compared to the reference device.

中文翻译：

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水辅助 CsPbBr3 钙钛矿纳米晶体的增强光致发光量子效率和稳定性

摘要 钙钛矿纳米晶体 (NCs) 具有高量子效率和窄半峰全宽 (FWHM) 等优点，是用于发光二极管 (LED) 的有前途的发光材料。然而，钙钛矿的离子键合特性导致它们在大气水分下快速化学分解。在此，我们提出了 CsPbBr3 钙钛矿 NCs，在合成过程中通过添加水来提高效率和稳定性。与不使用水的 CsPbBr3 NCs 相比，用受控量的水合成的 CsPbBr3 NCs 表现出大于 90% 的量子产率、超过 35 天的持续稳定性和更窄的 FWHM。最后，制造了加水钙钛矿 NC LED，与参考器件相比，它们的电流效率提高了近 5 倍。