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Fully Printed Zinc Oxide Electrolyte-Gated Transistors on Paper

Fully Printed Zinc Oxide Electrolyte-Gated Transistors on Paper

Nanomaterials 9(2)

Fully printed and flexible inorganic electrolyte gated transistors (EGTs) on paper with a channel layer based on an interconnected zinc oxide (ZnO) nanoparticle matrix are reported in this work. The required rheological properties and good layer formation after printing are obtained using an eco-friendly binder such as ethyl cellulose (EC) to disperse the ZnO nanoparticles. Fully printed devices on glass substrates using a composite solid polymer electrolyte as gate dielectric exhibit saturation mobility above 5 cm² V-1 s-1 after annealing at 350 °C. Proper optimization of the nanoparticle content in the ink allows for the formation of a ZnO channel layer at a maximum annealing temperature of 150 °C, compatible with paper substrates. These devices show low operation voltages, with a subthreshold slope of 0.21 V dec-1, a turn on voltage of 1.90 V, a saturation mobility of 0.07 cm² V-1 s-1 and an Ion/Ioff ratio of more than three orders of magnitude.

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Accession: 066446156

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PMID: 30704027

DOI: 10.3390/nano9020169

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