posted on 2024-02-26, 18:09authored byJing Zhang, Dongmin Qian, Huatian Hu, Kun Wang, Yu Cao, Qianshan Song, Jiacheng Yao, Xi Su, Li Zhou, Shunping Zhang, Ti Wang, Yaoguang Rong, Chang Liu, Li Mao, Tao Ding, Jun Yi, Yue-Jiao Zhang, Jian-Feng Li, Nana Wang, Jianpu Wang, Xiaoze Liu
Perovskite light-emitting diodes (PeLEDs) have emerged
as promising
candidates for lighting and display technologies owing to their high
photoluminescence quantum efficiency and high carrier mobility. However,
the performance of planar PeLEDs is limited by the out-coupling efficiency,
predominantly governed by photonic losses at device interfaces. Most
notably, the plasmonic loss at the metal electrode interfaces can
account for up to 60% of the total loss. Here, we investigate the
use of plasmonic nanostructures to improve the light out-coupling
in PeLEDs. By integrating these nanostructures with PeLEDs, we have
demonstrated an effectively reduced plasmonic loss and enhanced light
out-coupling. As a result, the nanostructured PeLEDs exhibit an average
1.5-fold increase in external quantum efficiency and an ∼20-fold
improvement in device lifetime. This finding offers a generic approach
for enhancing light out-coupling, promising great potential to go
beyond existing performance limitations.