We investigate the morphological, electrical, and optical properties of carbon nanotube thin films, focusing on films with transmittance, T > 90%. For films with T≈90% we measure sheet resistance of Rs <400 /□. However, we show that optoelectrical properties, such as σdc and σdc / σOp, 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/□. Acid treatment improves the conductivity by doping, giving properties such as T≈98% for Rs ≈10 k/□. © 2010 American Institute of Physics.
Very thin transparent, conductive carbon nanotube films on flexible substrates
Scardaci V.;
2010-01-01
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≈90% we measure sheet resistance of Rs <400 /□. However, we show that optoelectrical properties, such as σdc and σdc / σOp, 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/□. Acid treatment improves the conductivity by doping, giving properties such as T≈98% for Rs ≈10 k/□. © 2010 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
