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Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots
Alternative Title论文其他题名
Yang C. L.; Wang J. N.; Ge W. K.; Guo L.; Yang S. H.; Shen D. Z.
2001
Source PublicationJournal of Applied Physics
ISSN0021-8979
Volume90Issue:9Pages:4489-4493
AbstractOptical 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.
Indexed BySCI
Language英语
WOS IDWOS:000171594800026
Citation statistics
Cited Times:126[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/25235
Collection中科院长春光机所知识产出
Recommended Citation
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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