In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes.

doi:10.1039/c9nr05731e

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	In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes.
	Chen Peng; Liu Yufeng; Zhang Zhijun; sun yan; Hou Jingshan; Zhao Guoying; Zou Jun; Fang Yongzheng; Xu Jiayue; Dai Ning
刊名	Nanoscale
	2019
卷号	11 期号:35 页码:16499-16507
关键词	PEROVSKITE NANOCRYSTALS SELF-ABSORPTION EFFICIENT CSPBX3 NANOCOMPOSITES
DOI	10.1039/c9nr05731e
英文摘要	Recently, CsPbX3 (X = Cl, Br, and I) perovskite quantum dots (QDs) have exhibited significant potential for application in the field of lighting. However, their self-absorption and agglomeration significantly decrease their photoluminescence when their solution is centrifuged to form a powder; this hinders their applications in the field of solid-state lighting. Currently, there is lack of efficient solutions to overcome the self-absorption issue for CsPbX3 QDs. Thus, herein, an effective strategy is proposed via the in situ growth of CsPbBr3 (CPB) QDs in a mesoporous silica (m-SiO2) matrix, where self-absorption originating from the agglomeration of the QD powder is distinctly suppressed in the m-SiO2 matrix. Furthermore, due to its higher transmissivity, some photons can transport along the channels of m-SiO2 with less light loss. As a result, the photoluminescence quantum yield (PLQY) of 68% for the CsPbBr3/m-SiO2 (CPB/MS) powder is distinctly higher than that of the discrete CPB powder (36%). In addition, the chemical stability, thermal quenching and luminous decay were evidently improved for the CPB/MS nanocomposite. Finally, a remote flexible light-emitting diode with ultrahigh stability and arbitrary bending angle was achieved, which presented a pathway for the application of CPB QDs in solid-state lighting.
WOS记录号	WOS:000485971900034
内容类型	期刊论文
源URL	[http://202.127.2.71:8080/handle/181331/12390]
专题	上海技术物理研究所_上海技物所
推荐引用方式 GB/T 7714	Chen Peng,Liu Yufeng,Zhang Zhijun,et al. In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes.[J]. Nanoscale,2019,11(35):16499-16507.
APA	Chen Peng.,Liu Yufeng.,Zhang Zhijun.,sun yan.,Hou Jingshan.,...&Dai Ning.(2019).In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes..Nanoscale,11(35),16499-16507.
MLA	Chen Peng,et al."In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes.".Nanoscale 11.35(2019):16499-16507.