All-inorganic halide perovskite nanocrystals (NCs) have become the most promising next generation luminescent materials due to their excellent properties. However, there are many nonradiative recombination defects in colloidal perovskite NCs, which reduce their luminescent efficiency and stability. In this work, we incorporated the alkaline-earth (AE) metal ion Ca²⁺ into NCs to further improve the photoluminescence quantum yield (PLQY) of CsPbBr₃ and CsPbBr₁I₂ NCs. The PLQY of green-emitting CsPbBr₃ and red-emitting CsPbBr₁I₂ NCs can be boosted to 72.3% and 78.7%, respectively by doping the optimum amount of Ca²⁺. At the same time, we adopted a simple and low-cost one-pot method to integrate Ca²⁺-CsPbX₃ (X₃ = Br₃, Br₁I₂) NCs and superhydrophobic silica aerogels (AG), not only retaining the high PLQY of NCs, but also greatly improving the water, heat and light stability. Finally, the green-emitting Ca²⁺-CsPbBr₃@AG, red-emitting Ca²⁺-CsPbBr₁I₂@AG composites and the blue chip as the light sources show a wide color gamut that accounts for 129% of the NTCS 1953 value and nearly 100% of the Rec.2020 value. Additionally, we fabricated white light-emitting diode (WLED) devices by coupling Ca²⁺-CsPbBr₁I₂@AG composites with commercial YAG:Ce³⁺ phosphors on blue chips, obtaining bright white light with a color rendering index (CRI) up to 92.2.

全无机卤化物钙钛矿纳米晶体（NCs）由于其优异的性能已成为最有前途的下一代发光材料。然而，胶体钙钛矿NCs中存在许多非辐射复合缺陷，这降低了它们的发光效率和稳定性。在这项工作中，我们将碱土 (AE) 金属离子 Ca ²⁺加入到 NCs 中，以进一步提高 CsPbBr ₃和 CsPbBr ₁ I ₂ NCs的光致发光量子产率 (PLQY) 。通过掺杂最佳Ca ²⁺量，绿光CsPbBr ₃和红光CsPbBr ₁ I ₂ NCs的PLQY分别提高到72.3%和78.7%. 同时，我们采用简单、低成本的一锅法将Ca ²⁺ -CsPbX ₃ (X ₃  = Br ₃ , Br ₁ I ₂ ) NCs与超疏水二氧化硅气凝胶(AG)整合在一起，不仅保留了NCs的高PLQY，同时也大大提高了水、热和光稳定性。最后，发绿光的 Ca ²⁺ -CsPbBr ₃ @AG，发红光的 Ca ²⁺ -CsPbBr ₁ I ₂@AG 复合材料和作为光源的蓝筹显示出较宽的色域，占 NTCS 1953 值的 129% 和 Rec.2020 值的近 100%。此外，我们通过在蓝色芯片上将Ca ²⁺ -CsPbBr ₁ I ₂ @AG 复合材料与商用 YAG:Ce ³⁺磷光体耦合来制造白光发光二极管 (WLED) 器件，获得具有显色指数 (CRI) 的明亮白光高达 92.2。