化学
钙钛矿(结构)
光致发光
色域
量子产额
量子点
发光效率
钝化
二极管
发光二极管
荧光粉
光电子学
发光
色温
量子效率
荧光
结晶学
光学
材料科学
图层(电子)
物理
有机化学
作者
Xiaolin Zhu,Zhangcheng Pan,Tianyue Xu,Xiuwen Shao,Zhaoju Gao,Qiuping Xie,Yupeng Ying,Wei Pei,Huey-Wen Lin,Jia Wang,Xiaosheng Tang,Weiwei Chen,Yongfeng Liu
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-05-25
卷期号:62 (23): 9190-9198
被引量:9
标识
DOI:10.1021/acs.inorgchem.3c01092
摘要
All-inorganic perovskite quantum dots (PeQDs) have sparked extensive research focus on white-light-emitting diodes (WLEDs), but stability and photoluminescence efficiency issues are still remain obstacles impeding their practical application. Here, we reported a facile one-step method to synthesize CsPbBr3 PeQDs at room temperature using branched didodecyldimethylammonium fluoride (DDAF) and short-chain-length octanoic acid as capping ligands. The obtained CsPbBr3 PeQDs have a near-unity photoluminescence quantum yield of 97% due to the effective passivation of DDAF. More importantly, they exhibit much improved stability against air, heat, and polar solvents, maintaining >70% of initial PL intensity. Making use of these excellent optoelectronic properties, WLEDs based on CsPbBr3 PeQDs, CsPbBr1.2I1.8 PeQDs, and blue LEDs were fabricated, which show a color gamut of 122.7% of the National Television System Committee standard, a luminous efficacy of 17.1 lm/W, with a color temperature of 5890 K, and CIE coordinates of (0.32, 0.35). These results indicate that the CsPbBr3 PeQDs have great practical potential in wide-color-gamut displays.
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