Multichannel carbon nanotube field-effect transistors with compound channel layer

Changxin Chen; Wei Zhang; Yafei Zhang
November 2009
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p192110
Academic Journal
A multichannel carbon nanotube field-effect transistor (MC-CNTFET) with compound channel layer has been built. In this MC-CNTFET, a dispersedly directed array of long single-walled carbon nanotubes (SWCNTs) is used as primary channel layer and a randomly aligned monolayer network of short SWCNTs acts as secondary set of “bridge” channel layer, which causes large numbers of short semiconducting percolation paths formed. The device exhibits a large on-state current of 2.01 mA and simultaneously retains a high current on/off ratio of 103–104. The function dependency of the on-state current on the density of long SWCNTs and length of short SWCNTs is also presented.


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