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Journal of Nanomaterials
Volume 2010, Article ID 136860, 6 pages
http://dx.doi.org/10.1155/2010/136860
Research Article

Improved Field Emission Characteristics of Large-Area Films of Molybdenum Trioxide Microbelt

State Key Lab of Optoelectronic Materials and Technologies, Guangdong Province Key Lab of Display Material and Technology, School of Physics and Engineering, Sun Yat-sen University, Guangdong 510275, China

Received 15 September 2009; Revised 11 November 2009; Accepted 27 November 2009

Academic Editor: Yanqiu Zhu

Copyright © 2010 Dongmei Ban et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We study the field emission characteristics of large-area films of crystalline microbelt grown on silicon substrate by thermal evaporation in air using a commercial infrared sintering furnace. It is found that their turn-on field, threshold field, resistance to microdischarge and field emission current stability are better than nanowires, nanobelts and nanoflower. In addition, good uniform distribution of field emission sites can be observed. The physical reasons are explained responsible for such improvements on field emission characteristics of material. These results indicate that large-area microbelts may be suitable for cold-cathode electron source application.