Research on the field emission mechanism of nano-structured carbon film |
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| Authors: | Wang Yan-Yan a Li Ying-Ai b Xu Ji-Song a and Gu Guang-Rui |
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| Institution: | [1]Department of Physics, College of Science, Yanbian University, Yanfi 133002, China [2]National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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| Abstract: | The field emission(FE) characteristics of nano-structured 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. |
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| Keywords: | nano-structured carbon films field emission F-N theory space charge limited current three-region electric field model |
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