Negative mobility dependence in polythiophenes P3OT and P3HT evidenced by the charge extraction by linearly increasing voltage methodV. Kažukauskas, M. Pranaitis, V. Čyras, L. Sicot and F. KajzarEur. Phys. J. Appl. Phys., 37 3 (2007) 247-251DOI: https://doi.org/10.1051/epjap:2007030