CsPbBr₃ perovskite quantum dots (PQDs) have drawn much attention for their high photoluminescence quantum yield and great potential in optoelectronic applications. However, they suffer from poor stability under humid condition. This paper reports CsPbBr₃ PQDs incorporated in aluminum stearate (AlSt₃) matrix via an improved co-precipitation approach, in which AlSt₃ not only acted as hydrophobic matrix to protect CsPbBr₃ PQDs from surrounding environment, but also passivated the surface of PQDs via the coordination bond of St-Cs and St-Pb, as well as bond between Al³⁺ and Br⁻. By this method, the as-synthesized CsPbBr₃-AlSt₃ composites exhibited excellent stability in ambient condition even directly in water for more than 60 days. With the CsPbBr₃-AlSt₃ composites (green emission) used as color-conversion layer, a white light-emitting diode (WLED) was fabricated with a high color rendering index (Ra) of 90 and a low color temperature (Tc) of 4929 K. These results suggest that this method pave an effective way to stabilize CsPbBr₃ PQDs, which is of great importance for their further application.

CsPbBr ₃钙钛矿量子点（PQDs ）因其高的光致发光量子产率和在光电应用中的巨大潜力而​​备受关注。但是，它们在潮湿条件下稳定性差。本文报道CsPbBr _3个PQDs在硬脂酸铝并入（ALST ₃）通过一种改进的共沉淀方法矩阵，其中ALST ₃不仅充当疏水性基质来保护CsPbBr _3个PQDs从周围的环境，但也可通过钝化PQDs的表面圣-CS和St-Pb组成的配位键，以及键之间的Al ³⁺和Br ^- 。通过这种方法，合成后的CsPbBr ₃ -AlSt_3种复合材料即使在水中直接放置60天以上，在环境条件下也表现出出色的稳定性。将CsPbBr ₃ -AlSt ₃复合材料（绿色发射）用作颜色转换层，制得的白色发光二极管（WLED）的高显色指数（Ra）为90，而较低的色温（Tc）为90。 4929K。这些结果表明，该方法为稳定CsPbBr ₃ PQD铺平了有效途径，这对于它们的进一步应用非常重要。