High-Performance Green ZnSeTe Quantum Dot Light-Emitting Diodes Enabled by Localized Surface Plasmon Resonance

Quantum dot light-emitting diodes (QLEDs), as an emergent display technology, have garnered considerable interest due to their outstanding luminescent characteristics. Among various strategies to improve device performance, the localized surface plasmon resonance (LSPR) effect has been demonstrated as a promising approach. However, previously reported LSPR-enhanced green QLEDs rely on heavy-metal-based quantum dots (QDs), which pose a significant barrier to their future commercialization. Herein we present the first LSPR-enhanced eco-friendly green ZnSeTe-based QLEDs by incorporating Au nanoparticles into the ZnMgO electron transport layer (ETL) and optimizing their concentration to maximize the LSPR effect. As a result, the optimal plasmonic devices exhibited a significant improvement in performance, with the maximum external quantum efficiency (EQE) substantially increased from 7.15% to 11.75% and the extrapolated T 50 lifetime at 1000 cd m –2 markedly extended from 107.63 to 150.41 h. Consequently, this work provides an efficient strategy toward developing high-performance, eco-friendly green QLEDs.