Temperature dependence of field emission from cupric oxide nanobelt films

被引:166
作者
Chen, J [1 ]
Deng, SZ
Xu, NS
Zhang, WX
Wen, XG
Yang, SH
机构
[1] Zhongshan Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China
[2] Zhongshan Univ, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Peoples R China
[3] Hong Kong Univ Sci & Technol, Inst Nano Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
关键词
D O I
10.1063/1.1595156
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 muA/cm(2) is similar to11 MV/m. This decreases with increasing temperature, and at 700 K it is similar to6 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. (C) 2003 American Institute of Physics.
引用
收藏
页码:746 / 748
页数:3
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