光电子学
钙钛矿(结构)
二极管
发光二极管
材料科学
量子效率
光子
光学
物理
化学
结晶学
作者
Ziming Chen,Zhenchao Li,Zhe Chen,Ruoxi Xia,Guangruixing Zou,Linghao Chu,Shi‐Jian Su,Junbiao Peng,Hin‐Lap Yip,Yong Cao
出处
期刊:Joule
[Elsevier]
日期:2021-02-01
卷期号:5 (2): 456-466
被引量:72
标识
DOI:10.1016/j.joule.2020.12.008
摘要
The inferior light extraction efficiency (LEE), which is generally less than 20%, based on optical modeling, and the difficulty in achieving white emission are the two main challenges in the metal-halide-perovskite light-emitting diode (PeLED) field. Herein, we report a simple and efficient approach to construct high-performance white PeLEDs with much-enhanced LEE by coupling a blue PeLED with a layer of red perovskite nanocrystal (PeNC) down-converter through a rationally designed multilayer semitransparent electrode (LiF/Al/Ag/LiF). The red PeNC layer allows the extraction of the trapped waveguide mode and surface plasmon polariton mode in a blue PeLED and converts them to red emission, resulting in over 50% LEE improvement. Simultaneously, the complementary emission spectrum of blue photons and down-converting red photons contributes to a white PeLED with a high external quantum efficiency and luminance of more than 12% and approximately 2,000 cd m−2, respectively, which represent state-of-the-art results in this field.
科研通智能强力驱动
Strongly Powered by AbleSci AI