Enhancement of Field-Effect Mobility Due to Surface-Mediated Molecular Ordering in Regioregular Polythiophene Thin Film Transistors (pages 77–82)
D. H. Kim, Y. D. Park, Y. Jang, H. Yang, Y. H. Kim, J. I. Han, D. G. Moon, S. Park, T. Chang, C. Chang, M. Joo, C. Y. Ryu and K. Cho
Version of Record online: 13 JAN 2005 | DOI: 10.1002/adfm.200400054
Surface-mediated molecular ordering (see Figure) has a substantial effect on the preferential orientations of the P3HT chains, and this effect is used to enhance the field-effect mobility. Depending on the surface properties, the P3HT nanocrystals can adopt two different orientations – parallel and perpendicular to the insulator substrate – the field-effect mobilities of which differ by more than a factor of 4 and can reach 0.28 cm2 V–1 s–1.