Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots

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	Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots
	Yang, JR; Fang, HP; Gao, Y
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2016
卷号	7 期号:10 页码:1788—1793
关键词	PULSED-LASER-ABLATION ELECTRONIC-PROPERTIES OPTICAL-PROPERTIES HUMIDITY SENSOR SI NANOCRYSTALS CLUSTERS NANOPARTICLES CONDUCTIVITY LUMINESCENCE OXIDATION
ISSN号	1948-7185
通讯作者	Gao, Y (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China. ; Gao, Y (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China. ; Gao, Y (reprint author), Chinese Acad Sci, Shanghai Sci Res Ctr, Shanghai 201204, Peoples R China.
英文摘要	The optical properties of silicon quantum dots (Si QDs) are strongly influenced by circumjacent surface-adsorbed molecules, which would highly affect their applications; however, water, as the ubiquitous environment, has not received enough attention yet. We employed the time-dependent density functional calculations to investigate the water effect of photoluminescence (PL) spectra for Si QDs. In contrast with the absorption spectra, PL spectra exhibit distinct characteristics. For Si32H38, PL presents the single maximum in the dry and humid environment, while the emission spectrum displays a dual-band fluorescence spectroscopy in the low-humidity environment. This phenomenon is also observed in the larger Si QDs. The distinct character in spectroscopy is dominated by the stretching of the Si-Si bond, which could be explained by the self trapped exciton model. Our results shed light on the Si-water interaction that is important for the development of optical devices based on Si-coated surfaces.
收录类别	SCI
语种	英语
WOS记录号	WOS:000376421200006
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/25702]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Yang, JR,Fang, HP,Gao, Y. Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2016,7(10):1788—1793.
APA	Yang, JR,Fang, HP,&Gao, Y.(2016).Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,7(10),1788—1793.
MLA	Yang, JR,et al."Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 7.10(2016):1788—1793.