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题名:
Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots
作者: Yang, JR; Fang, HP; Gao, Y
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
出版日期: 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
DOI: 10.1021/acs.jpclett.6b00574
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.
文章类型: 期刊文献
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
ISSN号: 1948-7185
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25702
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Yang, JR,Fang, HP,Gao, Y. Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2016-01-01,7(10):1788—1793.
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文件名: Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots.pdf
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