Organic Field Effect Transistors (OFETs) Fabricated from Phenothiazine-TCNQ

Charge transfer cocrystals have interesting applications in the field of organic electronics due to their

unique optical and electronic properties. Controlled evaporative self-assembly (CESA) is a technique that

produces long, ordered ribbons of material on a substrate from an evaporating solvent. Charge transfer

cocrystals were successfully grown using this method to form a neat arrangement of ribbons that were

readily integrated with metal electrodes to create organic field-effect transistors for electronic

measurements. Temperature dependent measurements of the mobility in devices with phenothiazine

and 7,7’,8,8’ tetracyanoquinodimethane (PTZ-TCNQ) as the semiconductor indicated a hopping

mechanism for the charge transport, which was predominantly n-type conduction. These data could be

explained well using a super-exchange model.