Facile synthesis of KaCs1−aPbBr3@ molecular sieve SBA-15 composite with improved luminescence and wet/thermal stability

doi:10.1016/j.colsurfa.2022.129258

	Facile synthesis of KaCs1−aPbBr3@ molecular sieve SBA-15 composite with improved luminescence and wet/thermal stability
	Dong, Qizheng 1,2; Tian, Binglong 1,2; Zhang, Wenbo 1,2; He, Ling 1,2
刊名	Colloids and Surfaces A: Physicochemical and Engineering Aspects
	2022-09-05
卷号	648
关键词	Cesium compounds Emission spectroscopy Lead compounds Metal ions Metals Molar ratio Molecular sieves Nanocrystals Organic light emitting diodes (OLED) Perovskite Photoluminescence Semiconductor quantum dots Stability Zeolites Cspbbr3 perovskite quantum dot Facile synthesis Light-emitting displays Lightemitting diode Luminous intensity Moist conditions Optoelectronic materials PL intensity Property SBA-15 zeolite
ISSN号	0927-7757
DOI	10.1016/j.colsurfa.2022.129258
英文摘要	CsPbX3 (X[dbnd]Cl, Br, I) perovskite quantum dots (PeQDs) have excellent properties, which makes it the most promising optoelectronic materials for the next generation of light-emitting diodes (LEDs) and display devices fields. However, CsPbX3 PeQDs have poor-term stability and easily decompose in moist or heat conditions. In this paper, the KaCs1−aPbBr3 @SBA-15 composite was prepared at room temperature. Alkali metal ion doping can enhance the luminous intensity and tune the emission spectrum of CsPbBr3 PeQDs, while the introduction of the SBA-15 matrix improves the stability of the KaCs1−aPbBr3 PeQDs (a=0, 0.1, 0.25, 0.35, 0.4, 0.45). When the molar ratio of K+/Cs+ is 0.4 / 0.6, the PL intensity of CsPbBr3 PeQDs increased by 21.4%. The luminous intensity of K0.4Cs0.6PbBr3 @SBA-15 composite is further increased by 18.8% compared to the K0.4Cs0.6PbBr3 PeQDs, and its moisture and heat resistance are significantly improved. The PL intensity of K0.4Cs0 6PbBr3 @SBA-15 can maintain 52% of the initial brightness after immersion in deionized water for 21 days, as well as reaching 95% of the initial value in the heating/cooling cycle treatment. Such excellent properties make the KaCs1−aPbBr3 @SBA-15 composite an ideal material for lighting and display applications. © 2022
WOS研究方向	Chemistry
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000808552700002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158472]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Dong, Qizheng,Tian, Binglong,Zhang, Wenbo,et al. Facile synthesis of KaCs1−aPbBr3@ molecular sieve SBA-15 composite with improved luminescence and wet/thermal stability[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2022,648.
APA	Dong, Qizheng,Tian, Binglong,Zhang, Wenbo,&He, Ling.(2022).Facile synthesis of KaCs1−aPbBr3@ molecular sieve SBA-15 composite with improved luminescence and wet/thermal stability.Colloids and Surfaces A: Physicochemical and Engineering Aspects,648.
MLA	Dong, Qizheng,et al."Facile synthesis of KaCs1−aPbBr3@ molecular sieve SBA-15 composite with improved luminescence and wet/thermal stability".Colloids and Surfaces A: Physicochemical and Engineering Aspects 648(2022).