Herein, we propose an ionic liquid-polymer dielectric layer for flexible electronics reinforced by a chemical interaction between the polymer matrix (PVP) and the ionic liquid. Due to the robust structures of the cross-linked PVP matrix and hydrogen bonding between the ionic liquid and PVP, the ionic liquid-PVP (IL-PVP) layer exhibited a good mechanical strength when bending up to 1000 times and a stable thermal behaviour up to 300 °C. Furthermore, the IL-PVP dielectric layer showed a high capacitance value of ∼2 μF cm-2 and was operated well as a gate insulator for flexible ZnO thin film transistors with a linear field-effect mobility of ∼3.3 cm2 V-1 s-1 at a gate bias of 3 V.
Bibliographical notePublisher Copyright:
© The Royal Society of Chemistry 2015.
All Science Journal Classification (ASJC) codes
- Materials Chemistry