Flexible perovskite light-emitting diodes (FPLEDs) that combine the superior optoelectronic properties of perovskites with the potential of highly flexible, stretchable, and portable electronics have emerged as a new class of revolutionary LED devices for various applications. This article focuses on the recent FPLED research and development. The flexible substrate and electrode are summarized, and the relationship between structure optimization and device performance is established. In order to improve the flexibility and optoelectronic characteristics of FPLEDs, some strategies are put forward, such as the optimization of flexible electrode and emissive layer, the interface engineering, the energy level adjustment, the improvement of light extraction, as well as the improvement of flexibility and stretchability. Furthermore, the future development of FPLEDs is prospected.

中文翻译：

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柔性钙钛矿发光二极管的最新进展

柔性钙钛矿发光二极管 (FPLED) 结合了钙钛矿的优异光电特性和高度灵活、可拉伸和便携式电子产品的潜力，已成为适用于各种应用的新型革命性 LED 器件。本文重点介绍近期FPLED的研发。总结了柔性基板和电极，建立了结构优化与器件性能之间的关系。为了提高FPLEDs的柔性和光电特性，提出了一些策略，如柔性电极和发光层的优化、界面工程、能级调整、光提取的改进以及改进柔韧性和可拉伸性。此外，