Zheng Dong Guang, Kim Dong Ha
Department of Chemistry and Nano Science, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea.
Nanophotonics. 2022 Nov 10;12(3):451-476. doi: 10.1515/nanoph-2022-0569. eCollection 2023 Feb.
Metal-halide perovskite light-emitting diodes (PeLEDs) are considered as new-generation highly efficient luminescent materials for application in displays and solid-state lighting. Since the first successful demonstration of PeLEDs in 2014, the research on the development of efficient PeLEDs has progressed significantly. Although the device efficiency has significantly improved over a short period of time, their overall performance has not yet reached the levels of mature technologies for practical applications. Various degradation processes are the major impediment to improving the performance and stability of PeLED devices. In this review, we discuss various analysis techniques that are necessary to gain insights into the effects of various degradation mechanisms on the performance and stability of PeLEDs. Based on the causes and effects of external and internal factors, the degradation processes and associated mechanisms are examined in terms of critical physical and chemical parameters. Further, according to the progress of the current research, the challenges faced in studying degradation mechanisms are also elucidated. Given the universality of the degradation behavior, an in-depth understanding of the device degradation may promote the development of optimization strategies and further improve the performance and stability of PeLEDs.
金属卤化物钙钛矿发光二极管（PeLEDs）被视为用于显示器和固态照明的新一代高效发光材料。自2014年首次成功展示PeLEDs以来，高效PeLEDs的研发取得了显著进展。尽管器件效率在短时间内有了显著提高，但其整体性能尚未达到实际应用中成熟技术的水平。各种降解过程是提高PeLED器件性能和稳定性的主要障碍。在这篇综述中，我们讨论了各种分析技术，这些技术对于深入了解各种降解机制对PeLEDs性能和稳定性的影响是必要的。基于外部和内部因素的因果关系，从关键的物理和化学参数方面研究了降解过程及相关机制。此外，根据当前研究的进展，还阐明了研究降解机制所面临的挑战。鉴于降解行为的普遍性，深入了解器件降解可能会促进优化策略的发展，并进一步提高PeLEDs的性能和稳定性。
