Optimizing transistor performance of percolating carbon nanotube networks
- 26 July 2010
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 97 (4) , 043111
Abstract
In percolating networks of mixed metallic and semiconducting carbon nanotubes (CNTs), there is a tradeoff between high on-current (dense networks) and high on/off ratio (sparse networks). Experiments on transistors and Monte Carlo simulations were performed to determine the scaling behavior of device resistivity as a function of channel length (L) for CNT density (p) between 0.04 and 1.29 CNTs/μm2 in the on- and off-states (nanotube root mean square length of 5 μm). Optimized devices with field-effect mobility up to 50 cm2/V s at on/off ratio >103 were obtained at channel width W=50 μm and L>70 μm for p=0.54–0.81 CNTs/μm2.Keywords
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