Charge transport limited by grain boundaries in polycrystalline octithiophene thin film transistors R. Bourguiga, G. Horowitz, F. Garnier, R. Hajlaoui, S. Jemai and H. Bouchriha Eur. Phys. J. AP, 19 2 (2002) 117-122 Published online: 24 July 2002 DOI: 10.1051/epjap:2002057