Absence of substrate roughness effects on an all-printed organic transistor operating at one volt

A hygroscopic insulator transistor (HIFET) operating at 1V was manufactured using roll-to-roll techniques on a rough, low-cost plastic substrate. The effects of the substrate roughness on the active channel were studied by using two different plastic substrates and comparing HIFETs and organic field-effect transistors (OFETs). We found that the HIFET, as opposed to OFETs, is rather insensitive to changes in the roughness of plastic substrates. Hence, a robust feature of ion modulated transistors is shown.