Research on field emission mechanism of nano-structured carbon film |
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Authors: | Wang Yan-Yan Li Ying-Ai Xu Ji-Song Gu Guang-Rui |
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Affiliation: | a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;b National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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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. |
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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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