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基于碳纳米管构建的场效应管在纳电子器件中占有重要的位置,如何获得p型和n型的电子输运性能是人们所关注的.本文分别采用高功函数的Pt金属和低功函数的Al金属作为源漏电极,获得了p型输运性质和n型输运性质的基于碳纳米管构建的场效应管.能带结构的分析证明了接触电极的功函数在这种场效应管的输运机理中扮演了重要的角色,可以仅仅通过改变接触电极的材料,实现p型场效应管和n型场效应管之间的转换,这是经典的金属与半导体接触的理论无法解释的.
The field effect transistor based on carbon nanotubes occupies an important position in nanoelectronic devices, and how to obtain the p-type and n-type electron transport properties is of concern.We adopt the high work function Pt metal and low work function Al metal as the source and drain electrodes to obtain the p-type transport properties and n-type transport properties based on the construction of carbon nanotube FET tube structure analysis shows that the work function of the contact electrode in this FET Of the transport mechanism plays an important role, you can only change the contact electrode material, the p-type FET and n-type FET between the conversion, which is the classic theory of metal and semiconductor contact can not be explained .