Theoretical and experimental investigations combining in situ Kelvin probe microscopy (KPM) and macroscopic electrical studies are employed to explore the intrinsic transport in dithiophene-tetrathiafulvalene (DT-TTF) single crystal organic field-effect transistors. Our work demonstrates that ambipolar behavior is not restricted only to materials possessing a high electron affinity and thus may be a more general phenomenon.
Moreno, C. [et al.]. Evidence of intrinsic ambipolar charge transport in a high band gap organic semiconductor. "Journal of Material Chemistry", 16 Novembre 2011, vol. 22, p. 345-348.