High performance organic thin-film transistors based on hexamethylenetetrathiafulvalene lying flat-on-surface with non-layered packing motif

The fabrication of high performance organic thin-film transistors based on hexamethylenetetrathiafulvalene is reported. The evaporated polycrystalline films on polystyrene-treated substrates were highly oriented along the b-axis, where the grains are composed of three-dimensional brickwork stacks of molecular planes lying parallel to the substrate surfaces. The side-by-side intermolecular interactions parallel to the surfaces are responsible for the high mobility of the devices.