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

Arunprabaharan Subramanian, Mona Azimi, Cheng Lee Leong, Siew Ling Lee, Clara Santato and Fabio Cicoira

Article (2022)

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Titanium dioxide (TiO₂) is an abundant metal oxide, widely used in food industry, cosmetics, medicine, water treatment and electronic devices. TiO₂ is of interest for next-generation indium-free thin-film transistors and ion-gated transistors due to its tunable optoelectronic properties, ambient stability, and solution processability. In this work, we fabricated TiO₂ films using a wet chemical approach and demonstrated their transistor behavior with room temperature ionic liquids and aqueous electrolytes. In addition, we demonstrated the pH sensing behavior of the TiO2 IGTs with a sensitivity of ~48 mV/pH. Furthermore, we demonstrated a low temperature (120°C), solution processed TiO2-based IGTs on flexible polyethylene terephthalate (PET) substrates, which were stable under moderate tensile bending.

Uncontrolled Keywords

titanium dioxide; ion-gating; transistors; pH sensors; thin films

Subjects: 2000 Materials science and technology > 2010 Thin films/interfaces
Department: Department of Chemical Engineering
Department of Engineering Physics
Funders: Defence Research and Development Canada, Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
PolyPublie URL: https://publications.polymtl.ca/54324/
Journal Title: Frontiers in Electronics (vol. 3)
Publisher: Frontiers Media
DOI: 10.3389/felec.2022.813535
Official URL: https://doi.org/10.3389/felec.2022.813535
Date Deposited: 02 Nov 2023 13:45
Last Modified: 06 Apr 2024 10:45
Cite in APA 7: Subramanian, A., Azimi, M., Leong, C. L., Lee, S. L., Santato, C., & Cicoira, F. (2022). Solution-Processed Titanium Dioxide Ion-Gated Transistors and Their Application for pH Sensing. Frontiers in Electronics, 3, 813535 (9 pages). https://doi.org/10.3389/felec.2022.813535


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