Carbon nanotube and conducting polymer dual-layered films fabricated by microcontact printing

Abstract

We report carbon nanotube/conducting polymer dual-layered film (CPDF) electrodes fabricated by microcontact printing for flexible transparent electrodes of organic thin film transistors (OTFTs). The CPDFs show similar to 1000 Omega/sq surface resistivity and similar to 93% transmittance at an extremely low loading of single-walled carbon nanotubes, and can be self-aligned with a precision of 20 mu m. The CPDFs are applied as the source and drain electrodes in OTFTs without any supplementary alignment process, which leads to a mobility and a current on/off ratio of approximately 0.02 cm(2) V-1 s(-1) and similar to 10(4), respectively.