Blue photoluminescence from continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films with polycarbosilane (PCS) precursor

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	Blue photoluminescence from continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films with polycarbosilane (PCS) precursor
	Yao, R. Q. ; Feng, Z. D. ; Zhang, B. J. ; Zhao, H. R. ; Yu, Y. X. ; Chen, L. F. ; Zhang, Y. ; Feng ZD(冯祖德)
刊名	http://dx.doi.org/10.1016/j.optmat.2010.11.018
	2011-02
关键词	HYDROGENATED AMORPHOUS-SILICON OXIDIZED POROUS SILICON INTERFACE DEFECTS SINGLE-CRYSTALS THIN-FILMS CARBIDE EMISSION LUMINESCENCE FIBERS IRRADIATION
英文摘要	Fundamental Research Funds for the Central Universities [2010121053]; National Natural Science Foundation of China [50532010]; Science and Technology Program of Fujian Province [2009H0038]; Basic Research Program of Shenzhen City [JC200903180640A]; Novel continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films, namely, beta-SiC nano-crystals in amorphous SiOxCy and free C cluster matrix material, were fabricated by melt spinning the polycarbosilane (PCS) precursor. Effects of oxidation curing time and sintering temperatures on the photoluminescence (PL) properties of nanocomposite films were investigated. The PL spectra show two strong blue emissions at 416 nm and 435 nm, which are unchanged neither with oxygen content nor with beta-sic crystallite size. The PL intensity of the films is enhanced by increasing curing time when sintered at 1200 degrees C. However, a reversed trend is identified after the films were sintered at 1300 degrees C. Spectroscopy and microscopy studies indicate that the radiative recombination of carriers is ascribed to the oxygen mono- and di-vacancy from SiOxCy at the surfaces of beta-sic nano-crystals, whereas the photogeneration of carriers occurs in the beta-sic nano-crystals cores. The obtained results are expected to have important applications in advanced optoelectronic devices. (C) 2010 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59076]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yao, R. Q.,Feng, Z. D.,Zhang, B. J.,et al. Blue photoluminescence from continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films with polycarbosilane (PCS) precursor[J]. http://dx.doi.org/10.1016/j.optmat.2010.11.018,2011.
APA	Yao, R. Q..,Feng, Z. D..,Zhang, B. J..,Zhao, H. R..,Yu, Y. X..,...&冯祖德.(2011).Blue photoluminescence from continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films with polycarbosilane (PCS) precursor.http://dx.doi.org/10.1016/j.optmat.2010.11.018.
MLA	Yao, R. Q.,et al."Blue photoluminescence from continuous freestanding beta-SiC/SiOxCy/C-free nanocomposite films with polycarbosilane (PCS) precursor".http://dx.doi.org/10.1016/j.optmat.2010.11.018 (2011).