Organic transistors: A polarized response

Organic Field-effect transistors (OFETs), which are gaining high popularity due to their applicability in a wide range of electronics applications, are forcing various research in the material sciences as the composition of dielectric material can strongly affects the efficiencies of the resulting devices. Hulea and co-workers have reported the use of temperature-dependent measurements of charge mobility in a series of rubrene single-crystal OFETs to demonstrate that the charge carriers in the organic semiconductor couple to and cause movements of the dipoles in the dielectric material. It was observed that the speed of organic transistors can be enhanced by using low-polarity dielectric materials. Their work underlines the importance on the performance of organic transistors, the understanding of which can be exploited to improve the mobility and performance of the devices.