High-Performance Organic Field-Effect Transistors Based on pi-Extended Tetrathiafulvalene Derivatives

摘要

Organic field-effect transistors (OFET) have recently attracted considerable attention for electronic applications such as low-cost integrated circuits and flexible displays.Charge carrier mobility,on/off ratio,threshold voltage,and stability are important key factors that determine the FET performances.Over the recent 20 years,thiophene oligomers and acene molecules have been extensively studied.Recently,tetrathiafulvalene (TTF) derivatives were reported to exhibit excellent FET performances in single crystals.However,because of the strong electron-donating properties of TTFs,their thin films are labile to oxygen,resulting in poor FET performances in thin films.To enhance the air stability,decrease of the electron-donating property is necessary.