Authors
Guan-Jie Ding, Xiaolin Tai, Bo Li, Yong-Hui Song, Ya-Lan Hu, Lin-Lin Zeng, Zhen-Yu Ma, Sami Ur Rahman, Yue Lin, Fengjia Fan, Hong-Bin Yao
Published in
Advanced materials (Deerfield Beach, Fla.). Pages e75251. Oct 04, 2026. Epub Oct 04, 2026.
Abstract
Quasi-two-dimensional (quasi-2D) perovskites, featuring a large-cation-intercalated quantum-well structure, are efficient emitters for pure-red perovskite light-emitting diodes (PeLEDs); however, their electroluminescence is limited by poor carrier injection because all current quasi-2D emitters are horizontally aligned on low-mobility organic electron transport layers. Therefore, a PeLED with a quasi-2D perovskite vertically stacked on a high-mobility inorganic electron-transport layer is highly anticipated but has yet to be achieved. Here, we introduce branched guanidinium cations (GA+) and non-protonic phosphonium, (2-aminoethyl) triphenyl- cations (PAT+) to direct the vertical growth of quasi-2D emitters on a high-conductivity electron-transport layer, ZnMgO, enabling high-performance pure-red PeLEDs that exhibit a maximum luminance of 65 875 cd m-2 and an external quantum efficiency of 14.63% even at a high brightness of 49 080 cd m-2. Impressively, the low driving voltage, enabled by efficient carrier transport, also yields an operational half-lifetime of 5528 h at an initial luminance of 100 cd m-2, which represents the most stable pure-red PeLED reported to date.
PMID:
42829795
Bibliographic data and abstract were imported from PubMed on 04 Oct 2026.
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