Highly transparent and conductive thin films were assembled as a potential indium tin oxide (ITO) replacement using layer-by-layer (LbL) assembly with di-walled carbon nanotubes (DWNTs), sodium deoxycholate (DOC) as a stabilizer, and poly(diallyldimethyl ammonium chloride) [PDDA]. This assembly of DOC-stabilized CNTs and PDDA grows linearly as a function of bilayers deposited, with transparency (>84% T) and electrical conductivity (~300 O/sq) at a thickness of 23.5 nm (at 20 bilayers). Moreover, exposure to nitric acid vapor was able to further reduce sheet resistance in this film, down to 104 O/sq, due to the removal of insulating material and charge transfer doping. The optoelectronic performance of a 5 BL DWNT LbL film is much better than most other CNT thin films and capable of ITO replacement. Additionally, the bending and electrochemical stability suggest that these films could be a useful electrode for a variety of flexible electronics applications.

Transparent thin film nanotube assemblies with low sheet resistance via acid doping: An alternative to ITO

244th National Meeting (2012)

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