Metal halide perovskites have shown promising optoelectronic properties suitable for light-emitting applications. The development of perovskite light-emitting diodes (PeLEDs) has progressed rapidly over the past several years, reaching high external quantum efficiencies of over 20%. In this Review, we focus on the key requirements for high-performance PeLEDs, highlight recent advances on materials and devices, and emphasize the importance of reliable characterization of PeLEDs. We discuss possible approaches to improve the performance of blue and red PeLEDs, increase the long-term operational stability and reduce toxicity hazards. We also provide an overview of the application space made possible by recent developments in high-efficiency PeLEDs.

金属卤化物钙钛矿已显示出适用于发光应用的有前途的光电性能。钙钛矿发光二极管（PeLEDs）的开发在过去几年中取得了长足的进步，达到了超过20％的高外部量子效率。在本综述中，我们重点介绍高性能PeLED的关键要求，重点介绍材料和器件方面的最新进展，并强调PeLED可靠表征的重要性。我们讨论了改善蓝色和红色PeLED的性能，增加长期运行稳定性并减少毒性危害的可能方法。我们还概述了高效PeLED的最新发展所带来的应用空间。