Perovskite nanocrystals have attracted worldwide attention due to their outstanding optical versatility, high photoluminescence quantum yields, and facile synthesis. In this review, we firstly revisit the synthetic methods for perovskite nanocrystals (PNCs), including hot injection, anion exchange, solvothermal reaction, etc. In the meantime, we discuss effects of the different synthetic methods on the properties of PNCs, including the crystal size, emission spectral feature, quantum yield, etc., followed by several optimizing strategies. Finally, lasing and display applications of these PNCs in combination with liquid crystal materials are discussed thoroughly. Outlooks on the challenges and opportunities of these nanocrystalline materials in terms of adjunct applications with liquid crystals have been presented at the end, which are highly promising for next-generation light emission applications.

钙钛矿纳米晶体因其出色的光学多功能性，高的光致发光量子产率和简便的合成方法而吸引了全世界的关注。在这篇综述中，我们首先回顾了钙钛矿纳米晶体的合成方法，包括热注射，阴离子交换，溶剂热反应等。同时，我们讨论了不同合成方法对PNCs（包括晶体）性能的影响。尺寸，发射光谱特征，量子产率等，然后是几种优化策略。最后，对这些PNC与液晶材料结合的激光和显示应用进行了详尽的讨论。最后，对这些纳米晶体材料在液晶辅助应用方面的挑战和机遇提出了展望，