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首页> 外文期刊>Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures >Theories of field and thermionic electron emissions from carbon nanotubes
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Theories of field and thermionic electron emissions from carbon nanotubes

机译：碳纳米管的场理论和热电子发射

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Taking into account the effect of the low-energy band structure of carbon nanotubes (CN), we develop the theories of CN field and thermionic emissions. We give the analytic field and thermionic emission equations for both metal and semiconducting CNs. These theories modify the conventional Fowler–Nordheim (FN) and Murphy–Good (MG) theories. For large-diameter CNs and high fields, the field-emission equation reduces the FN-type field-emission equation. For small-diameter CNs and low fields, the field-emission equation goes beyond the FN-type behavior, which provides a possible way to understand the non-FN behavior observed in experimental results. Based on these theories, we give the electron-emission phase diagram on the field, thermionic, and intermediate emissions in the field-temperature space, whose boundaries have a slight shift to the corresponding boundaries of MG’s theory. These differences come from the energy-band structure difference between CN and conventional emitters. This theory provides an understanding of field and thermionic emissions for nanoscale materials.
机译：考虑到碳纳米管（CN）的低能带结构的影响，我们发展了CN场和热电子发射的理论。我们给出了金属和半导体CN的解析场和热电子发射方程。这些理论修改了传统的Fowler-Nordheim（FN）和Murphy-Good（MG）理论。对于大直径的CN和高场，场发射方程式简化了FN型场发射方程式。对于小直径的CN和低场，场发射方程超出了FN型行为，这为理解实验结果中观察到的非FN行为提供了一种可能的方式。根据这些理论，我们给出了场温度空间中场，热电子和中间发射的电子发射相图，它们的边界与MG理论的相应边界略有偏移。这些差异来自CN和常规发射器之间的能带结构差异。该理论提供了对纳米级材料场和热电子发射的理解。

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