| 초록 |
In this work, we investigated how a conducting polymer can be used as an active channel in organic field transistors (OFETs) and organic circuits. We fabricated a bilayer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and polyvinylpyrrolidone (PVP), where the overcoating PVP layer contained 1,5-Diazabicyclo[4.3.0]non-5-ene (DBN) as a solvent and a dedoping agent. Vertical distribution of thin films studied by depth profile of ToF-SIMS and XPS showed a clear interface between PEDOT:PSS and PVP layers. We found that the overcoating PVP layer was critical for efficient dedoping of conducting polymer and its stability enhancement. The electrical characteristics of dedoped PEDOT:PSS in OFETs showed an excellent switching behavior over 102 cycles of operation. We also fabricated a simple inverter based on the OFET device, demonstrating that our dedoping strategy can further be applied to various organic electronic devices. |
