Effect of the Gate Electrode/Electrolyte Interface on OECT performance

An organic electrochemical transistor (OECT) with a standard vertical topology and poly(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the active material of the channel is presented. It was found that the specific combination of the gate electrode material and electrolyte influences the transistor behavior. The effect of the different gate electrode/electrolyte interface on transistor performance were investigated by measuring the current-voltage characteristics, specifically the output and transfer characteristics, and the time-current dynamic characteristics. The influence of the type of the gate electrode/electrolyte interface on typical transistor parameters such as transconductance, $I_{ON}/I_{OFF}$ ratio and modulation response time ($t_{ON}, t_{OFF}$) is also discussed.