Due to indispensable ligands, polluted organic solution, or complex vapour deposition, stable CsPbBr₃ film is hard to be prepared directly using a simple and environmentally friendly method. To improve the stability of CsPbBr₃ film and its synthesis methods, the double‐films solid phase reaction was developed, and Cs₄PbBr₆/CsPbBr₃ composites were designed. Although the synthesized particle had a size of 2–5 μm, much larger than that of quantum dots, in ambient conditions the composites films still showed good photoluminescence properties, with the highest photoluminescence quantum yield of 80%. It had good stability against air, temperature and humidity, and even had interesting fluorescence‐enhanced phenomenon after about 4 days.

中文翻译：

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双层固相反应法合成荧光增强的Cs4PbBr6 / CsPbBr3复合薄膜

由于必不可少的配体，受污染的有机溶液或复杂的气相沉积，很难使用简单且环境友好的方法直接制备稳定的CsPbBr ₃膜。为了提高CsPbBr ₃薄膜的稳定性及其合成方法，开发了双薄膜固相反应技术，并开发了Cs ₄ PbBr ₆ / CsPbBr ₃复合材料的设计。尽管合成的颗粒尺寸为2–5μm，远大于量子点的尺寸，但在环境条件下，复合膜仍显示出良好的光致发光特性，最高的光致发光量子产率为80％。它对空气，温度和湿度具有良好的稳定性，甚至在约4天后还具有有趣的荧光增强现象。