Ion Gel Gated Polymer Thin-Film Transistors

Abstract

We have fabricated polymer semiconductor thin-film transistors using an ion gel (ionic liquid plus triblock copolymer) as the gate dielectric layer. The gate capacitance of the ion gel can be as large as 40 μF/cm2 at 10 Hz and 2 μF/cm2 at 1 kHz. In addition, the polarization response time of the ion gel is much faster than previously tested solid polymer electrolytes, allowing the ion gel gated transistors to operate at higher frequencies (>100 Hz).