Films of aligned cupric oxide nanobelts have been prepared in an aqueous solution at room temperature. Field-emission characteristics, including emission-current–applied-field plot and emission site distribution, have been studied using the transparent anode technique. In addition, the temperature dependence of the field-emission characteristics has been studied from room temperature to 750 K. The threshold field for obtaining a current density of 10 is ∼11 MV/m. This decreases with increasing temperature, and at 700 K it is ∼6 MV/m. At a fixed field of 10 MV/m, about a three-orders-of-magnitude increase of the emission current level has been observed. The results show that the cupric oxide nanobelt is a promising candidate for cathode material in a thermoelectric conversion device based on field emission.
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28 July 2003
Research Article|
July 28 2003
Temperature dependence of field emission from cupric oxide nanobelt films
Jun Chen;
Jun Chen
State Key Laboratory of Optoelectronic Materials and Technologies, and Guangdong Province Key Laboratory of Display Materials and Technologies, Zhongshan University, Guangzhou 510275, People’s Republic of China
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S. Z. Deng;
S. Z. Deng
State Key Laboratory of Optoelectronic Materials and Technologies, and Guangdong Province Key Laboratory of Display Materials and Technologies, Zhongshan University, Guangzhou 510275, People’s Republic of China
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N. S. Xu;
N. S. Xu
State Key Laboratory of Optoelectronic Materials and Technologies, and Guangdong Province Key Laboratory of Display Materials and Technologies, Zhongshan University, Guangzhou 510275, People’s Republic of China
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Weixin Zhang;
Weixin Zhang
Department of Chemistry, Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of China
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Xiaogang Wen;
Xiaogang Wen
Department of Chemistry, Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of China
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Shihe Yang
Shihe Yang
Department of Chemistry, Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of China
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Appl. Phys. Lett. 83, 746–748 (2003)
Article history
Received:
February 28 2003
Accepted:
May 27 2003
Citation
Jun Chen, S. Z. Deng, N. S. Xu, Weixin Zhang, Xiaogang Wen, Shihe Yang; Temperature dependence of field emission from cupric oxide nanobelt films. Appl. Phys. Lett. 28 July 2003; 83 (4): 746–748. https://doi.org/10.1063/1.1595156
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