High‐Performance Ambipolar Pentacene Organic Field‐Effect Transistors on Poly(vinyl alcohol) Organic Gate Dielectric

Growing organic semiconductors on dielectrics with different surface energies and dielectric constants results in striking changes of the film morphology (Figure, right). Ambipolar transport is reported in pentacene transistors on a PVA gate dielectric (left). The current–voltage characteristics correlate with capacitance–voltage investigations on metal–insulator–semiconductor structures.