Organic metal-organic semiconductor blended contacts in single crystal field-effect transistors for a significant improvement of the device performance

A novel approach to blend organic source and drain electrodes with semiconducting organic single crystals in field is described. The devices fabricated show a very high performance which is ascribed to a notable reduction of the contact resistance as measured by Kelvin probe microscopy. The average mobility is found to be four-fold that obtained from devices whereno interprenetration of the two materials takes place. This work highlights therefore the importance of the contacts in organic field effects transistors not only in terms of the alignments of the energy levels but also with respect to the interface morphology.