材料科学
发光二极管
电致发光
钙钛矿(结构)
卤化物
光致发光
光电子学
二极管
发光
化学工程
纳米晶
退火(玻璃)
纳米技术
无机化学
复合材料
化学
工程类
图层(电子)
作者
Jindou Shi,Wanyin Ge,Ye Tian,Meimei Xu,Wenxing Gao,Yuanting Wu
出处
期刊:Small
[Wiley]
日期:2021-03-11
卷期号:17 (14)
被引量:24
标识
DOI:10.1002/smll.202006568
摘要
Abstract Ensuring the stability of all‐inorganic halide perovskite light‐emitting diodes (LEDs) has become an obstacle that needs to be broken for commercial applications. Currently, lead halide perovskite CsPbX 3 (X = Br, I, Cl) nanocrystals (NCs) are considered as alternative materials for future fluorescent lighting devices due to their combination of superior optical and electronic properties. However, the temperature of the surface of the LEDs will increase after long‐term power‐on work, which greatly affects the optical stability of CsPbX 3 NCs. In order to overcome this bottleneck issue, a strategy of annealing perovskite materials in liquid is proposed, and the changes in photoluminescence and electroluminescence (EL) behaviors before and after annealing are studied. The results show that the luminescence stability of the annealed perovskite materials is significantly improved. Moreover, the EL stability of different perovskite LED devices under long‐term operation is monitored, and the performance of the annealed materials is particularly outstanding. The results have proved that this convenient and low‐cost liquid annealing strategy is suitable for large‐scale postprocessing of perovskite materials, granting them stable fluorescence emission, which will bring a new dawn to the commercialization of next‐generation optoelectronic devices.
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