Effect of Water Adsorption on the Photoluminescence of Silicon Quantum Dots
Yang, JR; Fang, HP; Gao, Y; 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.
2016
发表期刊JOURNAL OF PHYSICAL CHEMISTRY LETTERS
ISSN1948-7185
卷号7期号:10页码:1788—1793
文章类型期刊文献
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.
关键词Pulsed-laser-ablation Electronic-properties Optical-properties Humidity Sensor Si Nanocrystals Clusters Nanoparticles Conductivity Luminescence Oxidation
DOI10.1021/acs.jpclett.6b00574
收录类别SCI
语种英语
WOS记录号WOS:000376421200006
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25702
专题中科院上海应用物理研究所2011-2018年
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.
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Yang, JR,Fang, HP,Gao, Y,et al. 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,Gao, Y ,Gao, Y ,&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.
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