| 초록 |
Ion-gel dielectrics have been widely studied as a high capacitance and high-performance gate insulator for flexible thin film transistors. However, the mechanical strength and thermal stability of ion-gels are restrictive due to their weak structures from their physical interactions. Herein, we propose an ionic liquid-polymer dielectric layer reinforced by a chemical interaction between the cross-linked polymer matrix and the ionic liquid. Due to the robust structures from hydrogen bonding, the ionic liquid-PVP (IL-PVP) exhibited a good mechanical strength and a stable thermal behavior. Furthermore, its high-capacitance value, 2 μFcm-2, was obtained. This high-performance IL-PVP dielectric layer operated well as a gate insulator for flexible ZnO thin film transistors, which had a linear field-effect mobility of 8.45 cm2 V-1 S-1 at low operating voltage with 3 V gate bias. |
