Organic–inorganic hybrid perovskites (OIHP) have attracted a great deal of attention as promising light-emitting materials, because of their low-cost production via simple solution processing, high color purity, and easily tunable bandgaps. Nevertheless, the fabrication of OIHP films for light-emitting diodes generally requires complicated post-treatments, such as an anti-solvent dripping process, owing to the poor film forming property of the perovskite precursor solution. In this work, we employed an ionic liquid, methylammonium acetate (MAAc), as an additive to optimize the growth of FAPbBr 3 perovskite films via an anti-solvent-free approach. The influence of MAAc on the crystallization kinetics of FAPbBr 3 phase and optoelectronic properties of the resulting perovskite films have been systematically investigated. Our results demonstrate that MAAc is an effective modifier for creating perovskite films with reduced grain size, homogeneous grain distributio...

中文翻译：

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离子液体诱导的钙钛矿发光二极管性能增强

有机-无机杂化钙钛矿（OIHP）作为有前途的发光材料已引起了广泛的关注，因为它们通过简单的溶液处理，高色纯度和易于调节的带隙进行低成本生产。然而，由于钙钛矿前体溶液的不良成膜性，用于发光二极管的OIHP膜的制造通常需要复杂的后处理，例如抗溶剂滴落工艺。在这项工作中，我们采用离子液体醋酸甲基铵（MAAc）作为添加剂，通过无溶剂方法优化了FAPbBr 3钙钛矿薄膜的生长。已经系统地研究了MAAc对FAPbBr 3相结晶动力学和所得钙钛矿薄膜光电性能的影响。