发光二极管
电致发光
材料科学
二极管
光电子学
钙钛矿(结构)
铅(地质)
限制
光致发光
卤化物
纳米技术
工程物理
物理
化学
工程类
无机化学
结晶学
地质学
地貌学
机械工程
图层(电子)
作者
Jianxun Lu,Chuanzhong Yan,Wenjing Feng,Xiang Guan,Kebin Lin,Zhanhua Wei
出处
期刊:EcoMat
[Wiley]
日期:2021-01-24
卷期号:3 (2)
被引量:13
摘要
Abstract Metal halide perovskites (MHPs) have been developing rapidly in recent years due to their outstanding optoelectronic properties and tremendous contributions from worldwide researchers. The external quantum efficiencies of perovskite light‐emitting diodes (Pero‐LEDs) have all exceeded 20% for the green, red, and near‐infrared emitting ones. However, the toxicity and instability issues of the lead‐based MHPs are still big problems limiting their practical applications. The applications of the lead‐free MHPs (LFMHPs) are emerging as one of the most promising strategies to tackle these issues. Compared with lead‐based MHPs, the LFMHPs show better environment stability and broader emission regions from the violet to near‐infrared wavelength. Thanks to numerous contributions made by the researchers, great progress has already been made for the LFMHPs. For example, the photoluminescence quantum yield has reached near 100%. However, the performances of the lead‐free Pero‐LEDs are still lagging compared with their lead‐based counterparts. In this review, we comprehensively summarize the synthesis developments of LFMHPs and their applications in the down‐conversion white LEDs and electroluminescent Pero‐LEDs. Moreover, some suggestions and outlooks of the lead‐free Pero‐LEDs developments are proposed in the end. image
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