The role of inter-oligomer separation on charge transport in terthiophene-doped polycarbonate

Abstract

Change transport in terthiophene-dopes polycarbonate is assessed within a disorder-limited hopping framework. detailed analysis of the data reveals that polaron formation occurs with a self localisation energy of ∼ 0.45eV. Concentration studies reveal a transition from non-adiabatic to adiabatic behaviour as the inter-oligomer separation approaches the oligomer length. Detailed investigation of the adiabatic region is precluded by the emergence of deep trapping states which reduce the polaron drift length. It is proposed that these states are responsible for the inability to observe field enhanced currents in pure α-3T.