气候变化领域集成服务门户(CCPortal): High brightness blue light-emitting diodes based on CsPb(Cl/Br)3perovskite QDs with phenethylammonium chloride passivation

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DOI	10.1039/d0nr02597f
	High brightness blue light-emitting diodes based on CsPb(Cl/Br)3perovskite QDs with phenethylammonium chloride passivation
	Shao H.; Zhai Y.; Wu X.; Xu W.; Xu L.; Dong B.; Bai X.; Cui H.; Song H.
发表日期	2020
ISSN	20403364
起始页码	11728
结束页码	11734
卷号	12 期号:21
英文摘要	All inorganic perovskite quantum dots (QDs) (CsPbX3, X = Cl, Br, I) have been applied on light-emitting devices (LEDs) in recent years due to their excellent optical and optoelectronic properties. However, blue-light emitting perovskite QD LEDs (PQD-LEDs) exhibit poor performances compared with their green-and red-light emitting counterparts. Herein, we fabricated high performing blue-light emitting PQD-LEDs based on phenethylammonium chloride (PEACl) modified CsPb(Cl/Br)3 QDs. Firstly, the PEA-CsPbCl3 QDs were synthesized by introducing certain amounts of PEACl in the conventional hot-injection synthesis process. The merit of our synthesis lies in the fact that not only the Cl vacancies of CsPbCl3 QDs are efficiently modified by introducing the PEACl precursor, but also the partial long-chain organic ligands (OLA) capping on the surface of CsPbCl3 QDs are simultaneously replaced by shorter PEACl chains. Consequently, the PEA-CsPbCl3 QDs emitting at 410 nm with a PLQY of 62.3% were achieved. Furthermore, to meet the requirement of display applications, we exchanged Cl- with Br- ions at room temperature to precisely control the blue emission in the 460-470 nm spectral region and with a maximum PLQY of 80.2% at 470 nm. Finally, the PQD-LEDs based on PEA-CsPb(Cl/Br)3 perovskite QDs emitting at 462, 465, 468 and 470 nm were fabricated. The PQD-LEDs exhibit a maximal EQE of 2.15% and luminance of 620 cd m-2, which provides the highest value of luminance for the PQD-LEDs in the blue spectral range that satisfies the requirement of practical display applications. © 2020 The Royal Society of Chemistry.
scopus关键词	Chelation; Chlorine compounds; Lead compounds; Luminance; Passivation; Perovskite; Blue light emitting diodes; Blue light-emitting; Display application; Light emitting devices; Optoelectronic properties; Organic ligands; Poor performance; Synthesis process; Semiconductor quantum dots
来源期刊	Nanoscale
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176893
作者单位	College of Physics, Jilin University, 2699 Qianjin Street, Changchun, 130012, China; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
推荐引用方式 GB/T 7714	Shao H.,Zhai Y.,Wu X.,et al. High brightness blue light-emitting diodes based on CsPb(Cl/Br)3perovskite QDs with phenethylammonium chloride passivation[J],2020,12(21).
APA	Shao H..,Zhai Y..,Wu X..,Xu W..,Xu L..,...&Song H..(2020).High brightness blue light-emitting diodes based on CsPb(Cl/Br)3perovskite QDs with phenethylammonium chloride passivation.Nanoscale,12(21).
MLA	Shao H.,et al."High brightness blue light-emitting diodes based on CsPb(Cl/Br)3perovskite QDs with phenethylammonium chloride passivation".Nanoscale 12.21(2020).