Luminescent properties of solution-grown ZnO nanorods
Luminescent properties of solution-grown ZnO nanorods
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DOI：
10.1063/1.2214137
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发表时间：
2006-06-19
影响因子：
4
通讯作者：
Copeland, R. G.
中科院分区：
文献类型：
--
作者：
Hsu, J. W. P.;Tallant, D. R.;Copeland, R. G.
利用光致发光和阴极射线发光研究了溶液生长的氧化锌纳米棒的光学性质。所生长的纳米棒显示出宽的黄橙色亚带隙发光以及一个小的近带隙发射峰。只有当在带隙之上激发时才能观察到亚带隙发光。扫描阴极射线发光实验表明，亚带隙发光的宽度不是由于整体效应。经过还原后，亚带隙发光消失，近带隙发射增强。与化学计量比的和缺氧的氧化锌粉末相比，我们得出结论：黄橙色亚带隙发光极有可能源于与过量氧相关的体缺陷。（c）2006美国物理学会
The optical properties of solution-grown ZnO nanorods were investigated using photoluminescence and cathodoluminescence. The as-grown nanorods displayed a broad yellow-orange sub-band-gap luminescence and a small near-band-gap emission peak. The sub-band-gap luminescence can only be observed when exciting above band gap. Scanning cathodoluminescence experiments showed that the width of the sub-band-gap luminescence is not due to an ensemble effect. Upon reduction, the sub-band-gap luminescence disappeared and the near-band-gap emission increased. Compared to ZnO powders that are stoichiometric and oxygen deficient, we conclude that the yellow-orange sub-band-gap luminescence most likely arises from bulk defects that are associated with excess oxygen. (c) 2006 American Institute of Physics.