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2024.04 申飘阳在Advanced Optical Materials发表研究论文
发布时间:2024-04-23

文章标题/Title

Highly Efficient Pure-Red Quasi-2D Perovskite Light-Emitting Diodes Enabled by Propylammonium Chloride Passivator


影响因子/Impact Factor:9.0


文章链接/Link:https://onlinelibrary.wiley.com/doi/10.1002/adom.202303237


摘要/Abstract:Perovskite light-emitting diodes (PeLEDs) based on quasi-2D perovskites have attracted great attention in the past few years. Although significant achievements are made in device performance, fabrication of high-efficiency PeLEDs with pure-red (620–635 nm) light emission remains a significant challenge, which inhibits their practical application for full-color displays. Herein, a series of efficient red PeLEDs at 625 nm are realized by employing volatile alkylammonium chlorides (propylammonium chloride) passivators. The interaction of PbI2 with propylamine (PA)H+Cl in the precursor solution effectively passivates the defects, leading to reduced non-radiative recombination and enhanced device performance. By optimizing the amount of PACl, an external quantum efficiency (EQE) of 16.1% and a maximum brightness of 1701 cd m−2 are achieved, among the best-performing quasi-2D I-based PeLEDs with emissions ranging from 620 to 635 nm. This work provides a new route to improve the stability and efficiency of pure-red PeLEDs.