Toward Stable and Efficient Perovskite Light‐Emitting Diodes

材料科学 钙钛矿(结构) 电致发光 光电子学 发光二极管 二极管 纳米技术 计算机科学 工程物理 物理 工程类 化学工程 图层(电子)
作者
Dexin Yang,Baodan Zhao,Tao Yang,Runchen Lai,Dongchen Lan,Richard H. Friend,Dawei Di
出处
期刊:Advanced Functional Materials [Wiley]
卷期号:32 (9) 被引量:110
标识
DOI:10.1002/adfm.202109495
摘要

Abstract Metal halide perovskites (MHPs) are a promising class of materials for next‐generation display and lighting applications. Since the first demonstration of bright electroluminescence (EL) from perovskite light‐emitting diodes (PeLEDs) in 2014, the EQEs of these devices increased from below 1% to more than 20% in merely four years. Despite the meteoritic rise of device efficiencies that placed the new LED technology in the spotlight, many scientific and technical challenges remain, preventing PeLEDs from advancing further into practical applications. The success of inorganic III‐V LEDs, or commercial LED technologies in general, lies in the ability to demonstrate the reliable generation of blue EL. For PeLEDs, high operational stability and efficient blue EL remain to be some of the most pressing goals. To accelerate further developments in these areas, the recent progress in the research of PeLEDs is reviewed. The authors attempt to establish preliminary connections between the degradation mechanisms and the strategies for improvements, exemplified by a selection of recent representative works in the field. Lessons learned from organic LEDs and perovskite solar cells point toward some of the most important directions. This progress report serves as a catalyst for further interdisciplinary research involving materials scientists, chemists, and physicists working together to realize operationally stable PeLEDs.
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