In comparison, we obtain an average mobility of µFET (0º) = 0.50 ± 0.09 and µFET (90º) = 0.32 ± 0.05 cm 2 V -1 s -1 from OFETs coated from DCB solution. We attribute reduced hole mobility and transport anisotropy to the presence of helical conformation of the polymer chains and twinned morphology . As for OFETs coated from decane solution, the mobility is further decreased to µFET (0º) = 0.11 ± 0.01 and µFET (90º) = 0.10 ± 0.01 cm 2 V -1 s -1 , which we ascribe to highest paracrystalline disorder and isotropic film morphology.