Investigation of the effects of atomic oxygen exposure on the electrical and field emission properties of ZnO nanowires
Investigation of the effects of atomic oxygen exposure on the electrical and field emission properties of ZnO nanowires
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DOI：
10.1016/j.apsusc.2012.12.100
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发表时间：
2013-04
影响因子：
6.7
通讯作者：
Chuanxi Zhao;K. Huang;S. Deng;N. Xu;Jun Chen
中科院分区：
文献类型：
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作者：
Chuanxi Zhao;K. Huang;S. Deng;N. Xu;Jun Chen
研究了原子氧辐照对ZnO纳米线电学和场发射性能的影响。研究发现，ZnO纳米线在原子氧作用下，其开启电场增强。单根纳米线的电导率测量表明，臭氧暴露降低了ZnO纳米线的电导率。紫外光电子能谱结果表明，臭氧暴露增加的功函数。光致发光和X射线光电子能谱的结果表明，臭氧暴露降低了氧空位浓度，从而导致功函数和电导率的变化。我们认为场发射特性的变化主要是由表面功函数的变化引起的。
The effects of atomic oxygen exposure on electrical and field emission properties of ZnO nanowires were investigated. It was found that the turn-on field of ZnO nanowires increased after exposure to atomic oxygen. Measurement of electrical conductivity of single nanowire showed that the ozone exposure decreased the conductivity of the ZnO nanowire. Ultra-violet photoelectron spectroscopy results indicated that the ozone exposure increased the work function. Photoluminescence and X-ray photoelectron spectroscopy results suggested that ozone exposure reduced the oxygen vacancy concentration, which leads to the change in the work function and conductivity. We propose that the change of field emission properties is mainly caused by the changes in the surface work function.