Electrolyte-Gated Indium Oxide Based Transistor on PET Substrate Enabled by Hybrid Process

Printed electronics have demonstrated compatibility with flexible or non-conformal surfaces. Capillary -printed <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{In}_2 \mathrm{O}_3$</tex> nanoparticle-based transistors have great potential for flexible electronics since these devices exhibit highcarrier densities and mobility values. Another interesting advancement is the use of an electrolyte as agateinsulator, which allows to reduce the voltage requirements of transistors down to 1 V. Herein, we present a methodology for electrolytegated transistors (EGTs) on polyethylene terephthalate (PET) substrates by incorporating inkjet-printing, capillary-based deposition, and laser ablation processes. These hybrid-printed EGTs show an <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$I_{on} / I_{off}$</tex> ratio of up to 10<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup>, which is comparable to their counterparts on rigid substrates, creates routes for integrated printed electronics on flexible substrates.