Photoluminescence of ZnO nanocrystals embedded in BaF2 matrices by magnetron sputtering

	Photoluminescence of ZnO nanocrystals embedded in BaF2 matrices by magnetron sputtering
	Zang C. H.; Liu Y. C.; Mu R.; Zhao D. X.; Zhang J. Y.; Ma J. G.; Lu Y. M.; Yao B.; Shen D. Z.; Fan X. W.
	2008
发表期刊	Journal of Nanoscience and Nanotechnology
ISSN	1533-4880
卷号	8 期号:3 页码:1160-1164
摘要	This paper describes ZnO nanocrystals embedded in BaF2 matrices by the magnetron sputtering method in an attempt to use fluoride as a shell layer to embed ZnO nanocrystals core. BaF2 is a wide-band gap material, and can confine carriers in the ZnO films. As a result, the exciton emission intensity should be enhanced. The sample was annealed at 773 K, and X-ray diffraction (XRD) results showed that ZnO nanocrystals with wurtzite structure were embedded in BaF2 matrices. Raman-scattering spectra also confirmed the formation of ZnO nanoparticles. Abnormal longitudinal-optical (LO) phonon-dominant multiphonon Raman scattering was observed in the sample. Room-temperature photoluminescence (PL) spectra showed an ultraviolet emission peak at 374 nm. The origin of the ultraviolet emission is discussed here with the help of temperature-dependent PL spectra. The ultraviolet emission band was a mixture of free exciton and bound exciton recombination observed in the low temperature PL spectra (at 77 K). Abnormal temperature dependence of ultraviolet near-band-edge emission-integrated intensity of the sample was observed. The band tail state was observed in the absorption spectra, illustrating that the impurity-related defects were caused by the shell of the BaF2 grain layer. For comparison, ZnO films on BaF2 substrates were also fabricated by the magnetron sputtering method, and the same measurement methods were used.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/34481
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zang C. H.,Liu Y. C.,Mu R.,et al. Photoluminescence of ZnO nanocrystals embedded in BaF2 matrices by magnetron sputtering[J]. Journal of Nanoscience and Nanotechnology,2008,8(3):1160-1164.
APA	Zang C. H..,Liu Y. C..,Mu R..,Zhao D. X..,Zhang J. Y..,...&Fan X. W..(2008).Photoluminescence of ZnO nanocrystals embedded in BaF2 matrices by magnetron sputtering.Journal of Nanoscience and Nanotechnology,8(3),1160-1164.
MLA	Zang C. H.,et al."Photoluminescence of ZnO nanocrystals embedded in BaF2 matrices by magnetron sputtering".Journal of Nanoscience and Nanotechnology 8.3(2008):1160-1164.

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