A DC Model for Organic Electrochemical Transistors and Analysis of Their Performance as Voltage Amplifiers

Organic electrochemical transistors (OECTs) have received significant attention especially in biomedical applications. Despite many efforts on modeling these transistors, simulating OECT-based circuits is still a challenge due to the absence of accurate mathematical models. In this paper a DC model for p-type depletion-mode OECTs is proposed that more closely mimics their characteristics compared to the Bernards–Malliaras (B–M) model. Although OECTs are mostly used as transconductance amplifiers, their use as voltage amplifiers is investigated here with measurements at various drain-source voltages. Compared to the B–M model, the proposed model has better matching up to 3.6% between simulations and measurements of the analyzed transistors.