纳米晶
材料科学
光致发光
电致发光
成核
量子产额
发光二极管
量子点
钙钛矿(结构)
半最大全宽
二极管
光电子学
化学工程
量子效率
纳米技术
光学
化学
荧光
有机化学
物理
工程类
图层(电子)
作者
Xuanyu Zhang,Qiangqiang Wang,Zhiwei Yao,Ming Deng,Jing Wang,Qian Liu,Yang Ren,Yuying Yan,Chaoyu Xiang
标识
DOI:10.1002/advs.202304696
摘要
Abstract Perovskite nanocrystals for light‐emitting diodes are often synthesized by uncontrollable metathesis reactions, suffering from low product yield, nonuniform growth, and poor stability. Herein, by controlling the nucleation kinetics with high dissociation constant (Ka or Kb) acids or bases, homogenous one‐route nucleation of perovskite nanocrystals is achieved as the cluster intermediates are eliminated. The stable, shape uniform, and narrow size distribution green nanocrystals are synthesized. The perovskite nanocrystal film exhibites excellent stability in 80% humidity air with only a 10% photoluminescence intensity drop after 16 h. Efficient and stable electroluminescence is demonstrated with an FWHM of 16 nm at 517 nm. The green devices shows a peak EQE of 24.13% with a lifetime T 50 of 54 min at 10 000 cd m −2 .
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