Charge transport properties and memory effects in organic thin-film transistors using polymeric dielectrics

The basic element in organic electronics is the organic thinfilm transistor (OTFT), consisting of an organic semiconductor and a gate dielectric. Thus far, the greatest research effort has been focused on polymeric insulators. Polymeric insulators are used as a surface modification layer and/or gate dielectric layer in OTFT [1–4]. Polymeric materials are especially attractive because they are compatible with solution processing on flexible substrates, giving hope for low-cost, lightweight, rugged, flexible electronics. Therefore, studying the carrier transport and charge-trapping properties of organic films upon dielectrics is an important topic for the further development and optimization of organic electronics.