Abstract All inorganic cesium lead halide perovskite nanocrystals have attracted widespread attention due to their excellent optical properties. However, large-scale synthesis of high photoluminescence quantum yield (PLQY) CsPbBr3 nanorods (NRs) is still challenging. Herein, we report a facile, low-cost and large-scale synthesis of CsPbBr3 NRs with 86% PLQY at room temperature, in which the employment of acetic acid as precursor solvent promoted the concentrations of Cs+ and Pb2+ in the precursor solution and dominated the formation of CsPbBr3 NRs. The synthesized CsPbBr3 NRs with an average width of around 8 nm and average lengths of 18 to 30 nm have an excellent narrow-band (FWHM = 17 nm) green emission peaked at 517 nm.

中文翻译：

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在室温下以 86% 的光致发光量子产率轻松、低成本和大规模合成 CsPbBr3 纳米棒

摘要 全无机铯卤化铅钙钛矿纳米晶因其优异的光学性能而受到广泛关注。然而，大规模合成高光致发光量子产率 (PLQY) CsPbBr3 纳米棒 (NRs) 仍然具有挑战性。在此，我们报告了一种在室温下轻松、低成本和大规模合成 86% PLQY 的 CsPbBr3 NRs，其中使用乙酸作为前体溶剂促进了前体溶液中 Cs+ 和 Pb2+ 的浓度，并主导了CsPbBr3 NRs 的形成。合成的 CsPbBr3 NRs 平均宽度约为 8 nm，平均长度为 18 至 30 nm，具有出色的窄带（FWHM = 17 nm）绿色发射，峰值为 517 nm。