Photoluminescence study of ZnO nanotubes under hydrostatic pressure

	Photoluminescence study of ZnO nanotubes under hydrostatic pressure
其他题名	论文其他题名
	Chen S. J.; Liu Y. C.; Shao C. L.; Xu C. S.; Liu Y. X.; Liu C. Y.; Zhang B. P.; Wang L.; Liu B. B.; Zou G. T.
	2006
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	88 期号:13
摘要	Photoluminescence of ZnO single crystal nanotubes grown on sapphire substrate by metal organic chemical vapor deposition has been studied as a function of applied hydrostatic pressure using the diamond-anvil-cell technique. The photoluminescence spectra of the ZnO nanotubes at atmospheric pressure are dominated by strong near-band-edge Gamma(FX) and Gamma(BX) excitonic emission lines accompanied by a weak broad deep-level (DL) emission band. The pressure-induced shifts of all observed emission lines are followed up to 15 Gpa, when ZnO nanotubes undergo a phase transition from a direct-gap wurtzite structure to an indirect-gap rocksalt structure. The Gamma(FX) emission is found to shift toward higher energy with applied pressure at a rate of 29.6 meV/GPa, which provides a method to measure the pressure coefficient of the direct Gamma band gap in the wurtzite ZnO nanotubes. The Gamma(BX) emission has a pressure coefficient of 21.6 meV/GPa, about 30% smaller than that of the ZnO band gap, which suggests that it might originate from the radiative recombination of the excitons bound to donorlike deep centers rather than shallow donors. The pressure coefficient of the broad DL emission band in ZnO tube is 16.8 meV/GPa, which indicates that the initial states involved in the emission process are deep localized states.
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/181722/26706
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Chen S. J.,Liu Y. C.,Shao C. L.,et al. Photoluminescence study of ZnO nanotubes under hydrostatic pressure[J]. Applied Physics Letters,2006,88(13).
APA	Chen S. J..,Liu Y. C..,Shao C. L..,Xu C. S..,Liu Y. X..,...&Zou G. T..(2006).Photoluminescence study of ZnO nanotubes under hydrostatic pressure.Applied Physics Letters,88(13).
MLA	Chen S. J.,et al."Photoluminescence study of ZnO nanotubes under hydrostatic pressure".Applied Physics Letters 88.13(2006).

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