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.
Bibliographical noteFunding Information:
Research funding: Financial supports from the National Research Foundation of Korea are acknowledged. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (2020R 1A 2C 3003958), the Basic Science Research Program (Priority Research Institute) through the NRF grant funded by the Ministry of Education (2021R1A6A1A10039823), and the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (2020R 1A 6C 101B194).
© 2022 the author(s), published by De Gruyter, Berlin/Boston.
- degradation mechanisms
- device structure
- light-emitting diodes