钝化
钙钛矿(结构)
二极管
发光二极管
材料科学
光电子学
化学工程
纳米技术
图层(电子)
工程类
作者
Chao Shen,Shuyan Fang,Jibin Zhang,Xiangfei Liang,Chenhui Su,Jian Qing,Wanzhu Cai,Yunhan Luo,Ran Yang,Lintao Hou
出处
期刊:Advanced photonics
[SPIE - International Society for Optical Engineering]
日期:2024-02-26
卷期号:6 (02)
标识
DOI:10.1117/1.ap.6.2.026002
摘要
Despite the rapid advances of red and green perovskite light-emitting diodes (PeLEDs), achieving high brightness with high external quantum efficiency (EQE) remains a challenge for the pure-blue PeLEDs, which greatly hinders their practical applications, such as white-light illumination and in optical communication as a high-speed and low-loss light source. Herein, we report a high-performance pure-blue PeLED based on mixed-halide quasi-2D perovskites incorporated with a zwitterionic molecule of 3-(benzyldimethylammonio) propanesulfonate (3-BAS). Experimental and density functional theory analysis reveals that 3-BAS can simultaneously eliminate non-radiative recombination loss, suppress halide migration, and regulate phase distribution for smoothing energy transfer in the mixed-halide quasi-2D perovskites, leading to the final perovskites with high photoluminescence quantum yield and robust spectrum stability. Thus, the high-performance pure-blue PeLED with a recorded brightness with 1806 cd m−2 and a relative higher EQE of 9.25% is achieved, which is successfully demonstrated in a visible light communication system for voice signal transmission. We pave the way for achieving highly efficient pure-blue PeLEDs with great application potential in future optical communication networks.
科研通智能强力驱动
Strongly Powered by AbleSci AI