Solution-Processed Titanium Dioxide Ion-Gated Transistors and Their Application for pH Sensing

Titanium dioxide (TiO 2 ) is an abundant metal oxide, widely used in food industry, cosmetics, medicine, water treatment and electronic devices. TiO of interest for next-generation indium-free thin-film transistors ion-gated due to its tunable optoelectronic properties, ambient stability, solution processability. In this work, we fabricated films using a wet chemical approach demonstrated their transistor behavior with room temperature ionic liquids aqueous electrolytes. addition, the pH sensing IGTs sensitivity ∼48 mV/pH. Furthermore, low (120°C), processed -based on flexible polyethylene terephthalate (PET) substrates, which were stable under moderate tensile bending.