在当今的科技领域，光电子应用发展得如火如荼，而卤化铅钙钛矿曾是这一领域的明星材料。它为众多光电子应用开辟了新路径，像LED显示屏、太阳能电池等都受益于它优异的光学性能。不过，卤化铅钙钛矿也存在明显的短板。一方面，铅是一种有毒的重金属，会对环境和人体健康造成严重危害；另一方面，它的合成过程十分复杂，需要耗费大量的时间和成本，这大大限制了它的进一步实际应用。为了解决这些问题，科学家们想出了新办法。他们开发出一种简单又强大的机械化学合成方法，利用无溶剂球磨策略来合成卤化锰铯（Cs₃MnX₅，X代表卤族元素）。这种绿色合成方法最大的亮点是不使用任何有害的有机溶剂，避免了对环境的污染。而且，它能快速、低成本地生产出具有优异光学性能的无铅Cs₃MnX₅。更厉害的是，在室温下，通过这种环保的方法就能轻松制备出混合卤化物成分的Cs₃MnX₅钙钛矿，还不需要后续的纯化步骤。此外，科学家们还通过球磨策略制备出了锌掺杂的Cs₃MnX₅钙钛矿，其热稳定性和环境稳定性都得到了增强，这充分证明了球磨策略的强大之处。总的来说，球磨法在生产高质量、无毒的卤化物钙钛矿方面效果显著，未来有望在发光二极管等光电子设备中得到广泛应用，为我们的生活带来更多便利和科技体验。

期刊

Energy &Environmental Materials

标题

Lead-Free Cesium Metal Halide Perovskite via Solvent-Free Mechanosynthesis Route

作者

Yue Zhang, Jiangxuan Dong, Wenjie Zhang, Yajing Chang, Xiping Gao, Yanjie He, Xinchang Pang

摘要

Recent advancements in lead halide perovskites opened up an avenue for vast optoelectronic applications. However, lead toxicity and the complicated synthesis process posed major obstacles to their further practical applications. To address these issues, a facile and robust mechanochemical synthesis of cesium manganese halide (Cs3MnX5, X = halide element) was developed via a highly efficient solvent-free ball milling strategy. This green approach exempted the utilization of any harmful organic solvents, thereby enabling the fast and cost-effective production of lead-free Cs3MnX5 with excellent optical properties. Cs3MnX5 perovskites with mixed halide compositions could also be readily fabricated through this eco-friendly approach at room temperature without any post-purification. Furthermore, the robustness of the ball milling strategy was proved by fabricating zinc-doped Cs3MnX5 perovskites with enhanced thermal stability and ambient stability. These features demonstrated that ball milling was highly efficacious for producing high-quality non-toxic halide perovskites, which could be used in light-emitting diodes.

原文链接

https://onlinelibrary.wiley.com/doi/10.1002/eem2.70064

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