Currently, all-inorganic CsPbX₃ (X=Cl, Br, and I) perovskite quantum dots (QDs) receive great attention due to their spectacular characteristics and optical properties. However, the stability problem greatly restricts the applicability of CsPbX₃ QDs. Herein, a novel protection strategy is reported by in-situ growth of CsPbX₃ QDs in the mesoporous blue-emitting indium-based metal organic frameworks (ZJU-28). Accordingly, the CsPbX₃@ZJU-28 composites possess dual-emission with broad band blue light emission ascribed to π-π* transitions of organic ligands in ZJU-28 and a distinctive narrow peak attributed to the excitonic emission of CsPbX₃ QDs. Intriguingly, the CsPbX₃@ZJU-28 exhibited both excitation-wavelength dependent and temperature dependent luminescence properties, which make the composites promising for potential application in anti-counterfeiting and temperature sensing. In addition, the ZJU-28 matrix encapsulation give CsPbX₃ QDs greatly improved stability, which makes them attractive in LED applications. Therefore, this work will broaden the applicability of CsPbX₃ QDs in multifunctional applications, such as anti-counterfeiting, temperature sensing and LEDs.

目前，全无机CsPbX ₃（X = Cl，Br和I）钙钛矿量子点（QDs）由于其引人注目的特性和光学特性而备受关注。但是，稳定性问题极大地限制了CsPbX ₃ QD的适用性。本文中，通过在介孔蓝光发射铟基金属有机骨架（ZJU-28）中CsPbX ₃ QD的原位生长，报道了一种新颖的保护策略。因此，CsPbX ₃ @ ZJU -28复合材料具有双发射，宽带蓝光发射归因于ZJU-28中有机配体的π-π*跃迁，并具有归因于CsPbX ₃ QD激子发射的独特窄峰。有趣的是，CsPbX ₃ZJU-28既显示出激发波长相关的发光特性，又显示出温度相关的发光特性，这使得该复合材料有望在防伪和温度感测中得到潜在的应用。此外，ZJU-28矩阵封装使CsPbX ₃ QD的稳定性大大提高，这使其在LED应用中具有吸引力。因此，这项工作将扩大CsPbX ₃ QD在防伪，温度感应和LED等多功能应用中的适用性。