Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots

	Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots
其他题名	论文其他题名
	Yang C. L.; Wang J. N.; Ge W. K.; Guo L.; Yang S. H.; Shen D. Z.
	2001
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	90 期号:9 页码:4489-4493
摘要	Optical properties of ZnO quantum dots (QDs) capped with polyvinyl pyrrolidone (PVP) molecules have been investigated. It is demonstrated that surface modification by PVP can dramatically change the emission spectra of the ZnO QDs. At the optimized condition with a PVP/Zn2+ ratio of 3:5, the photoluminescence (PL) spectrum of ZnO QDs shows a strong ultraviolet (UV) emission while the low energy green emission is fully quenched. This is a result of the surface passivation of the ZnO QDs by the PVP molecules. The origin of the green emission is attributed to the surface states associated with oxygen vacancies. Temperature and excitation power dependent PL studies suggest that the UV emission is associated with localized states. (C) 2001 American Institute of Physics.
收录类别	SCI
语种	英语
WOS记录号	WOS:000171594800026
引用统计	被引频次：141[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25235
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Yang C. L.,Wang J. N.,Ge W. K.,et al. Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots[J]. Journal of Applied Physics,2001,90(9):4489-4493.
APA	Yang C. L.,Wang J. N.,Ge W. K.,Guo L.,Yang S. H.,&Shen D. Z..(2001).Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots.Journal of Applied Physics,90(9),4489-4493.
MLA	Yang C. L.,et al."Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots".Journal of Applied Physics 90.9(2001):4489-4493.

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