Green luminescence from Cu-doped ZnO nanorods: Role of Zn vacancies and negative thermal quenching

被引：57

作者：

Huang, X. H. ^{[1
]}

Zhang, C. ^{[2
]}

Tay, C. B. ^{[3
]}

Venkatesan, T. ^{[1
,3
]}

Chua, S. J. ^{[1
,2
,3
]}

机构：

[1] Natl Univ Singapore, Fac Engn, Dept Elect & Comp Engn, Singapore 117576, Singapore

[2] Singapore MIT Alliance, Singapore 117576, Singapore

[3] Natl Univ Singapore, NUSNNI Nanocore, Singapore 117411, Singapore

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 11期

关键词：

OPTICAL-PROPERTIES; EMISSION; NANOSTRUCTURES; COPPER; BAND;

D O I：

10.1063/1.4798240

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bright and stable structured green luminescence (GL) is achieved from solution-grown Cu-doped ZnO nanorods. Dependence of photoluminescence on the annealing parameters reveals that GL is correlated with creation of Zn vacancies (V-Zn) and then formation of Cu dopants at Zn sites (Cu-Zn). High internal quantum efficiency (43%) of the GL can be sustained up to 240K due to negative thermal quenching. In contrast to the poor stability of defects-related visible emission, the structured GL shows good stability with respect to sample heating. Cu-doped ZnO nanorods with strong and stable GL have potential applications in visible light display and lighting. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798240]

引用

页数：3

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