Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
Adv Mater. 2019 Nov;31(47):e1803336. doi: 10.1002/adma.201803336. Epub 2018 Sep 6.
Light emission is a critical property that must be maximized and controlled to reach the performance limits in optoelectronic devices such as photovoltaic solar cells and light-emitting diodes. Halide perovskites are an exciting family of materials for these applications owing to uniquely promising attributes that favor strong luminescence in device structures. Herein, the current understanding of the physics of light emission in state-of-the-art metal-halide perovskite devices is presented. Photon generation and management, and how these can be further exploited in device structures, are discussed. Key processes involved in photoluminescence and electroluminescence in devices as well as recent efforts to reduce nonradiative losses in neat films and interfaces are discussed. Finally, pathways toward reaching device efficiency limits and how the unique properties of perovskites provide a tremendous opportunity to significantly disrupt both the power generation and lighting industries are outlined.
发光是一个关键性质，必须加以最大化和控制，以达到光电设备如光伏太阳能电池和发光二极管的性能极限。卤化物钙钛矿是用于这些应用的一类令人兴奋的材料，因为它们具有独特的有前途的属性，有利于在器件结构中产生强发光。本文介绍了当前对最先进的金属卤化物钙钛矿器件中发光物理的理解。讨论了光子的产生和管理，以及如何在器件结构中进一步利用这些光子。还讨论了器件中光致发光和电致发光涉及的关键过程，以及最近在纯薄膜和界面中减少非辐射损耗的努力。最后，概述了达到器件效率极限的途径，以及钙钛矿的独特性质如何为发电和照明行业带来巨大的变革机会。
