Inducement of Azimuthal Molecular Orientation of Pentacene by Imprinted Periodic Groove Patterns for Organic Thin‐Film Transistors

A new strategy for control of the in-plane orientation of pentacene is introduced using nanometer-scale periodic groove patterns as an alignment layer. Compared to pentacene films that are not aligned, an enhanced field effect mobility of 1.67 cm2 V−1 s−1 has been achieved when the optimal π-orbital overlap direction is parallel to the direction of the current flow.