In-situ correlation of the microstructure and electrical properties during polymorphic transitions in an organic semiconductor film

Because the molecular packing has direct impact in the charge carrier mobility of organic field effect transistors (OFETs), identifying the different polymorphs and determining their stability at the interfaces are key factors for device optimization. In this experiment, we aim at providing a link between the crystallographic changes and electrical conductivity evolution by in-situ monitoring the structure by GIWAXS and the electrical current collected OFETs for C8O-BTBT-OC8, a model system for understanding and controlling polymorphism in devices. This experiment will advance our understanding on the role of interfaces and the kinetic factors affecting the stability of each polymorph.