Multidimensional hybrid perovskites are becoming increasingly important for photovoltaic and light-emitting applications because of their improved moisture stability, unique luminescence, and transport properties. Little is known, however, about the phase distribution and self-organization properties of multidimensional perovskite thin films. In this work, we combine steady-state and time-resolved cathodoluminescence microscopy with photoluminescence techniques and reveal with unprecedented resolution the characteristic self-assembly of heterogeneous phases of perovskites with different dimensionality, driven by uneven redistribution of methylammonium cations during film formation. Our findings provide fundamental insights for the rational design of complex multidimensional perovskite systems with improved stability and emissive properties.

中文翻译：

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多维钙钛矿薄膜中自组织非均相的阴极发光

多维杂化钙钛矿因其改善的湿稳定性，独特的发光性和传输性能而在光伏和发光应用中变得越来越重要。然而，关于多维钙钛矿薄膜的相分布和自组织特性知之甚少。在这项工作中，我们将稳态和时间分辨的阴极荧光显微镜与光致发光技术相结合，并以前所未有的分辨率揭示了具有不同尺寸的钙钛矿异相的特征性自组装，这是由于成膜过程中甲基铵阳离子的不均匀再分布所致。我们的发现为复杂多维钙钛矿体系的合理设计提供了基础见解，具有改进的稳定性和发射特性。