Organic field-effect transistors with a low driving voltage using albumin as the dielectric layer

Solution-processed organic field-effect transistors (OFETs) were fabricated based on a hygroscopic biomaterial, egg-white albumin, as the gate dielectric and poly(3-hexylthiophene) as the semiconductor. With increasing humidity, such OFETs can show improved performance exhibiting a very low driving voltage, together with enhanced carrier mobility and suppressed off-state current.