Research on field emission mechanism of nano-structured carbon film

doi:10.1088/1674-1056/21/8/087902

Abstract The field emission (FE) characteristics of nano-structrued carbon films (NSCFs) are investigated. The saturation behaviour of the field emission current density found at high electric field E cannot be reasonably explained by the traditional Fowler-Nordheim (F-N) theory. A three-region E model and the curve-fitting method are utilized for discussing the FE characteristics of NSCFs. In the low, high, and middle E regions, the FE mechanism is reasonably explained by a modified F-N model, a corrected space-charge-limited-current (SCLC) model and the joint model of F-N and SCLC mechanism, respectively. Moreover, the measured FE data accord well with the results from our corrected theoretical model.

Keywords: nano-structured carbon films field emission F-N theory space charge limited current three-region electric field model

Received: 09 January 2012
Revised: 15 February 2012
Accepted manuscript online:

PACS:	79.70.+q	(Field emission, ionization, evaporation, and desorption)
	81.05.U-	(Carbon/carbon-based materials)
	81.15.Gh	(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11164031) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China (Grant No. (2009)1341).

Corresponding Authors: Gu Guang-Rui
E-mail: grgu@ybu.edu.cn

Cite this article:

Wang Yan-Yan (王艳燕), Li Ying-Ai (李英爱), Xu Ji-Song (许基松), Gu Guang-Rui (顾广瑞 ) Research on field emission mechanism of nano-structured carbon film 2012 Chin. Phys. B 21 087902

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