Synthesis and photoluminescence propoerties of the SiC/SiO2 core-shell nanowires

	Synthesis and photoluminescence propoerties of the SiC/SiO2 core-shell nanowires
	Liu X.; Cao L.-Z.; Jiang H.; Song H.
	2014
发表期刊	Guangdianzi Jiguang/Journal of Optoelectronics Laser
ISSN	ISBN/10050086
卷号	25 期号:6 页码:1115-1118
摘要	Due to the indirect band gap structure, the light emission efficiency of SiC materials is usually very low, which limits the applications of SiC in optoelectronic devices. A lot of methods have been employed to improve the light emission efficiency of SiC materials, of which synthesizing SiC nano-structure materials would be an effective way. In our work, SiC/SiO2 core-shell nanowires were synthesized on Si (100) substrate by the reaction of methane with silicon dioxide using iron as catalyst. The structural properties of the nanowires are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). It can be seen that the nanowires have a diameter about 50 nm and length about 10 m, and the nanowires consist of a 30 nm single-crystal -SiC core and a 10 nm amorphous SiO2 shell. The light-emitting properties of nanowires are studied by photoluminescence spectroscopy. A sharp ultraviolet peak at 380 nm and an intensive broad green band with defined maximum peak at 505 nm are observed in PL spectra of as-grown nanowires. According to analysis, the ultraviolet peak originates from the oxygen-vacancy defects in the SiO2 shell and the broad green band comes from the SiC cores caused by quantum confinement effect.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44429
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu X.,Cao L.-Z.,Jiang H.,et al. Synthesis and photoluminescence propoerties of the SiC/SiO2 core-shell nanowires[J]. Guangdianzi Jiguang/Journal of Optoelectronics Laser,2014,25(6):1115-1118.
APA	Liu X.,Cao L.-Z.,Jiang H.,&Song H..(2014).Synthesis and photoluminescence propoerties of the SiC/SiO2 core-shell nanowires.Guangdianzi Jiguang/Journal of Optoelectronics Laser,25(6),1115-1118.
MLA	Liu X.,et al."Synthesis and photoluminescence propoerties of the SiC/SiO2 core-shell nanowires".Guangdianzi Jiguang/Journal of Optoelectronics Laser 25.6(2014):1115-1118.

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