Type

Journal Article

Authors

Jonathan Coleman

Subjects

Physics

Topics
transparent films conductive carbon films physics optical properties flexible substrates thin films nanoscience materials carbon nanotube

Very thin transparent, conductive carbon nanotube films on flexible substrates (2010)

Abstract We investigate the morphological, electrical, and optical properties of carbon nanotube thin films, focusing on films with transmittance, T > 90%. For films with T approximate to 90% we measure sheet resistance of R-s<400 Omega/square. However, we show that optoelectrical properties, such as sigma(dc) and sigma(dc)/sigma(Op), degrade with decreasing film thickness, t, for percolating nanotube networks, i.e., those with t < 20 nm and T > 90%. Thus, while reducing t can give T > 99%, the corresponding Rs increases to > 40 k Omega/square. Acid treatment improves the conductivity by doping, giving properties such as T approximate to 98% for R-s approximate to 10 k Omega/square.
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Full list of authors on original publication

Jonathan Coleman

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Jonathan Coleman
Trinity College Dublin
Total Publications: 217