Enhancement of Field Emission Current of Iron Oxide Nanoemitters by in-situ Thermal Treatment

被引：0
|
作者：
Wu, J. Q. [1 ]
Chen, Jun [1 ]
Deng, S. Z. [1 ]
Xu, N. S. [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
来源：
2011 24TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC) | 2011年
关键词：
iron oxide; nanoemitters; field emission; thermal treatment; desorption; ALPHA-FE2O3; NANOFLAKES;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Enhancement field emission current from iron oxide nanoemitters was observed after applying a in-situ thermal treatment process in vacuum. In one thermal treatment cycle, iron oxide nanoemitters were heated to 200 degrees C and kept for 2 hr. Comparison of I-V characteristics before and after thermal treatment shows that the field emission current were much enhanced from 60 mu A/cm(2) to 500 mu A/cm(2) at electric field of 10 MV/m. The threshold electric field decreased from 20 MV/m to 12.2 MV/m. Moreover, the enhancement was retained and the field emission current does not decrease to original level after cooling down. The emission current under different gas atmosphere were studied. The results show the observed enhancement was caused by the surface gas desorption, most likely the oxygen.
引用
收藏
页码：133 / 134
页数：2
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