Abstract All-inorganic (CsPbX3, X = Cl, Br, I) perovskite nanocrystals (PNCs) demonstrate promising optoelectronic properties, provided their poor stabilities can be overcome. Herein, a facile in-situ encapsulating strategy is proposed to form super-hydrophobic nanocomposites (abbr. PNC@SSiP) on a large scale by incorporating CsPbBr3 NCs into organosilica nanoparticles, which reduces degradation and improves the environmental stabilities. The resulting nanocomposites demonstrated monodispersed CsPbBr3 NCs (5–6 nm) embedded homogeneously in the organosilica matrix, and a high photoluminescence quantum yield (PLQY over 50%). The PNC@SSiP exhibited extraordinary stability towards water, enhanced thermal stability and photostability. However, photoluminescent (PL) decay of less than 20% can be monitored if the PNC@SSiP nanocomposites are immersed in water for 60 days. In addition, a high static contact angle for water (152.44 ± 0.97°) further indicates excellent super-hydrophobicity of the nanocomposites. The super-hydrophobic PNC@SSiP nanocomposites can be used for fabricating luminous devices, such as white light emitting diode (WLED), further demonstrating the potential value of the obtained nanocomposites as a stable luminophore in optoelectronic applications. This novel synthesis strategy greatly widens the methods for fabricating highly stable perovskite materials in optoelectronic applications.

中文翻译：

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由封装在有机二氧化硅中的 CsPbX3 钙钛矿纳米晶体制成的超疏水发光纳米复合材料

摘要 全无机 (CsPbX3, X = Cl, Br, I) 钙钛矿纳米晶体 (PNCs) 表现出良好的光电性能，前提是它们的稳定性较差。在此，提出了一种简便的原位封装策略，通过将 CsPbBr3 NCs 掺入有机二氧化硅纳米粒子中，大规模形成超疏水纳米复合材料（简称 PNC@SSiP），从而减少降解并提高环境稳定性。由此产生的纳米复合材料表现出单分散的 CsPbBr3 NCs（5-6 nm）均匀嵌入有机二氧化硅基质中，并且具有高光致发光量子产率（PLQY 超过 50%）。PNC@SSiP 对水表现出非凡的稳定性，增强了热稳定性和光稳定性。然而，如果将 PNC@SSiP 纳米复合材料浸入水中 60 天，则可以监测到小于 20% 的光致发光 (PL) 衰减。此外，水的高静态接触角（152.44±0.97°）进一步表明纳米复合材料具有优异的超疏水性。超疏水性 PNC@SSiP 纳米复合材料可用于制造发光器件，如白光发光二极管 (WLED)，进一步证明了所获得的纳米复合材料在光电应用中作为稳定发光体的潜在价值。这种新颖的合成策略极大地拓宽了在光电应用中制造高度稳定的钙钛矿材料的方法。超疏水性 PNC@SSiP 纳米复合材料可用于制造发光器件，如白光发光二极管 (WLED)，进一步证明了所获得的纳米复合材料在光电应用中作为稳定发光体的潜在价值。这种新颖的合成策略极大地拓宽了在光电应用中制造高度稳定的钙钛矿材料的方法。超疏水性 PNC@SSiP 纳米复合材料可用于制造发光器件，如白光发光二极管 (WLED)，进一步证明了所获得的纳米复合材料在光电应用中作为稳定发光体的潜在价值。这种新颖的合成策略极大地拓宽了在光电应用中制造高度稳定的钙钛矿材料的方法。