Quantum dots of halide perovskite are considered to be the promising candidates for optoelectronic applications. Although many methods have been developed to prepare CsPbX₃ (X = Cl, Br, I) nanocrystals, the large-scale synthesis of CsPbX₃ nanocrystals remains an outstanding challenge. In this paper, nanocrystals of CsPbBr₃ were subjected to one-pot synthesis in octane by using a precursor with a high concentration. CsPbBr₃ nanocrystals were obtained in octane dispersion as well as in the precipitation. All obtained nanocrystals were in the CsPbBr₃ nanocubes with uniform morphologies and average size of 7.8 nm, and featured the same emission peak and photoluminescence quantum yield (PLQY), which indicated that the concentration of the precursor did not influence the nucleation of the CsPbBr₃ nanocrystals. This result implied a large-scale synthesis of the nanocrystals. Following this, ~ 1 g of CsPbBr₃ nanocrystals were obtained only in the 10-mL octane solution when the concentration of PbBr₂ was up to 0.3 mol/L. This one-pot process was suitable for the large-scale and cost-effective synthesis of CsPbX₃ nanocrystals. Besides, the obtained CsPbBr₃ nanocrystals were used as probes of the [Zn²⁺] detection for the first time. It was found that the Zn²⁺ ions could quench the photoluminescence intensity of CsPbX₃ nanocrystals and the quench effect showed high selectivity and high anti-interference.

卤化物钙钛矿的量子点被认为是光电子应用的有希望的候选者。尽管已经开发了许多制备CsPbX ₃（X = Cl，Br，I）纳米晶体的方法，但是CsPbX ₃纳米晶体的大规模合成仍然是一个巨大的挑战。在本文中，使用高浓度的前驱体在辛烷中对CsPbBr ₃纳米晶体进行了一锅法合成。CsPbBr ₃纳米晶体可以在辛烷中分散，也可以在沉淀中获得。所有获得的纳米晶体都在CsPbBr _3中具有均匀形态和平均尺寸为7.8 nm的纳米立方体，并具有相同的发射峰和光致发光量子产率（PLQY），这表明前体的浓度不影响CsPbBr ₃纳米晶体的成核作用。该结果暗示了纳米晶体的大规模合成。此后，当PbBr ₂的浓度高达0.3 mol / L时，仅在10 mL辛烷溶液中获得了约1 g CsPbBr ₃纳米晶体。这种一锅法适合于大规模，经济高效地合成CsPbX ₃纳米晶体。此外，将获得的CsPbBr ₃纳米晶体用作[Zn ²⁺]首次检测。研究发现，Zn ²⁺离子可以猝灭CsPbX ₃纳米晶体的光致发光强度，猝灭效应具有很高的选择性和抗干扰性。