Toward Highly Luminescent and Stabilized Silica-Coated Perovskite Quantum Dots through Simply Mixing and Stirring under Room Temperature in Air

doi:10.1021/acsami.7b18964

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	Toward Highly Luminescent and Stabilized Silica-Coated Perovskite Quantum Dots through Simply Mixing and Stirring under Room Temperature in Air
	Liu, Z. Q.; Zhang, Y. Q.; Fan, Y.; Chen, Z. Q.; Tang, Z. B.; Zhao, J. L.; Lv, Y.; Lin, J.; Guo, X. Y.; Zhang, J. H.; Liu, X. Y.
	2018
发表期刊	Acs Applied Materials & Interfaces
ISSN	1944-8244
卷号	10 期号:15 页码:13053-13061
摘要	Methylammonium (MA) lead halide (MAPbX(3), X = Cl, Br, I) perovskite quantum dots (PQDs) are very sensitive to environment (moisture, oxygen, and temperature), suffering from poor stability. To improve the stability, we synthesized silica-coated PQDs (SPQDs) by an improved ligand-assisted reprecipitation method through simply mixing and stirring under room temperature in air without adding water and catalyst, the whole process took only a few seconds. The photoluminescence (PL) spectra of the SPQDs can be tuned continuously from 460 to 662 nm via adjusting the composition proportion of precursors. The highest PL quantum yields (PLQYs) of blue-, green-, and red-emissive SPQDs are 56, 95, and 70%, respectively. The SPQDs show remarkably improved environmental and thermal stability compared to the naked PQDs because of effective barrier created by the coated silica between the core materials and the ambience. Furthermore, it is found that different light emitting SPQDs can maintain their original PL properties after mixing of them and anion-exchange reactions have not happened. These attributes were then used to mix green- and yellow-emissive SPQDs with polystyrene (PS) to form color-converting layers for the fabrication of white light-emitting devices (WLEDs). The WLEDs exhibit excellent white light characteristics with CIE 1931 color coordinates of (0.31, 0.34) and color rendering index (CRI) of 85, demonstrating promising applications of SPQDs in lighting and displays.
关键词	silane silica-coated perovskite quantum dots hydrolysis stability anion-exchange reaction light-emitting-diodes mesoporous silica display backlights enhanced stability optical-properties anion-exchange carbon dots nanocrystals nanocomposites efficient Science & Technology - Other Topics Materials Science
DOI	10.1021/acsami.7b18964
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/61196
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Liu, Z. Q.,Zhang, Y. Q.,Fan, Y.,et al. Toward Highly Luminescent and Stabilized Silica-Coated Perovskite Quantum Dots through Simply Mixing and Stirring under Room Temperature in Air[J]. Acs Applied Materials & Interfaces,2018,10(15):13053-13061.
APA	Liu, Z. Q..,Zhang, Y. Q..,Fan, Y..,Chen, Z. Q..,Tang, Z. B..,...&Liu, X. Y..(2018).Toward Highly Luminescent and Stabilized Silica-Coated Perovskite Quantum Dots through Simply Mixing and Stirring under Room Temperature in Air.Acs Applied Materials & Interfaces,10(15),13053-13061.
MLA	Liu, Z. Q.,et al."Toward Highly Luminescent and Stabilized Silica-Coated Perovskite Quantum Dots through Simply Mixing and Stirring under Room Temperature in Air".Acs Applied Materials & Interfaces 10.15(2018):13053-13061.

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