This study demonstrates a facile and general one-pot synthetic approach for all-inorganic colloidal cesium lead halide (CsPbX₃, X = Cl, Br, I, mixed Cl/Br, Br/I) perovskite nanocrystals (NCs) by directly heating the precursors/solvent/ligands. In contrast to typical routes, these reactions are conducted in open air, requiring neither high temperature dissolution nor a vacuum/inert atmosphere. The composition, shape and size of the as-synthesized NCs can be finely tuned by varying the reaction parameters such as temperature and time, ligand species and precursor halide ratios. CsPbX₃ morphologies may be varied from perovskite nanoplatelets (NPLs) to nanosheets and sphere-like NCs, each with tunable absorption spectra and photoluminescence (PL) emissions. In particular, mixed halide NCs with controllable band gaps and PL emission across the entire visible region have been demonstrated by tuning the precursor halide ratios. The reproducibility and scalability of the present synthetic protocol is elaborated by upscaling the amounts of chemicals and solvents/ligands in a representative synthesis of CsPbBr₃ NPLs. The representative large-scale CsPbBr₃ NPLs exhibit a high PL quantum yield of 73.56%.

中文翻译：

---

一锅可扩展的全无机钙钛矿纳米晶体的形态，组成和光致发光可调

这项研究表明，通过直接加热钙钛矿型纳米晶体（NCs）的全无机胶体铯卤化铅（CsPbX ₃，X = Cl，Br，I，混合Cl / Br，Br / I）的简便通用的一锅法。前体/溶剂/配体。与典型路线相反，这些反应在露天条件下进行，既不需要高温溶解，也不需要真空/惰性气氛。可以通过改变反应参数（例如温度和时间，配体种类和前体卤化物比率）来精细调整合成后的NC的组成，形状和大小。CsPbX ₃形态可以从钙钛矿纳米片（NPL）到纳米片和球状NC有所不同，每种都具有可调的吸收光谱和光致发光（PL）发射。尤其是，通过调节前体卤化物的比例，已经证明了在整个可见光区域具有可控带隙和PL发射的混合卤化物NCs。通过合成代表性的CsPbBr ₃ NPLs中化学药品和溶剂/配体的量，可以详细说明本合成方案的可重复性和可扩展性。代表性的大规模CsPbBr ₃ NPLs显示出73.56％的高PL量子产率。