An In-Plane Anisotropic Organic Semiconductor Based Upon Poly(3-hexyl Thiophene)
01 July 2002
The structure and field effect mobility of a bilayer film of friction-transferred PTFE and P3HT on a SiO sub 2 substrate was studied. Friction transferred PTEE has a high density of ridges and grooves on the ten nanometer scale running along the friction transfer direction. Solvent cast P3HT deposits with a significant tendency for the polymer chain axis to align along the PTFE friction transfer direction. Alignment was confirmed by X-ray scattering. The field effect mobility was found to be highly anisotropic, with the larger mobility along the PTFE friction transfer direction. Intrinsic as well as topological causes for this anisotropy are considered.