Xiao Peng, Yu Yicong, Cheng Junyang, Chen Yonglong, Yuan Shengjin, Chen Jianwen, Yuan Jian, Liu Baiquan
Guangdong-Hong Kong-Macao Intelligent Micro-Nano Optoelectronic Technology Joint Laboratory, Foshan University, Foshan 528225, China.
School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China.
Nanomaterials (Basel). 2021 Jan 4;11(1):103. doi: 10.3390/nano11010103.
Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced.
最近，钙钛矿发光二极管（PeLEDs）在学术界和工业界受到越来越多的关注，具有在包括显示、照明和信号等广泛技术领域应用的潜力。如今，PeLEDs的最大外量子效率可以超过20%，然而，PeLEDs的寿命仍远未达到实际应用的需求。在这篇综述中，从钙钛矿发光材料的设计、器件工程的创新、光学效应的操控以及先进封装的引入等角度，全面总结了提高PeLEDs寿命的最新概念。首先，介绍了决定PeLEDs寿命的基本概念。然后，重点阐述了提高有机-无机杂化和全无机PeLEDs寿命的策略。特别地，基于有机发光二极管和镉基量子点发光二极管的相关概念，讨论了用于提高寿命的光学效应管理和封装方法，这有助于深入理解PeLEDs的寿命。最后，介绍了进一步提高PeLEDs寿命所面临的挑战和机遇。
