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Fully Printed Zinc Oxide Electrolyte-Gated Transistors on Paper.

José Tiago Carvalho1, Viorel Dubceac2, Paul Grey3

  • 1CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, Campus da Caparica, 2829-516 Caparica, Portugal. jt.carvalho@campus.fct.unl.pt.

Nanomaterials (Basel, Switzerland)
|February 2, 2019
PubMed
Summary

Researchers developed fully printed, flexible inorganic electrolyte gated transistors (EGTs) using zinc oxide (ZnO) nanoparticles on paper. These eco-friendly devices operate at low voltages, demonstrating potential for flexible electronics.

Keywords:
electrolyte-gated transistorsnanoparticlespaper transistorsprinted electronicszinc oxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Flexible electronics require novel materials and fabrication methods.
  • Inorganic electrolyte-gated transistors (EGTs) offer advantages in stability and performance.
  • Paper substrates present a low-cost, flexible, and eco-friendly platform for electronic devices.

Purpose of the Study:

  • To develop fully printed and flexible inorganic electrolyte-gated transistors (EGTs) on paper substrates.
  • To utilize zinc oxide (ZnO) nanoparticles for the transistor channel layer.
  • To achieve efficient device performance using eco-friendly materials and processes.

Main Methods:

  • Fabrication of EGTs using printed ZnO nanoparticle ink with ethyl cellulose (EC) binder.
  • Optimization of ZnO nanoparticle content for paper-compatible annealing temperatures (up to 150 °C).
  • Characterization of device performance, including mobility, subthreshold slope, and on/off ratio.

Main Results:

  • Achieved fully printed and flexible EGTs on paper with a ZnO nanoparticle channel.
  • Demonstrated low operation voltages with a subthreshold slope of 0.21 V dec⁻¹ and turn-on voltage of 1.90 V.
  • Obtained a saturation mobility of 0.07 cm² V⁻¹ s⁻¹ and an Ion/Ioff ratio exceeding three orders of magnitude.

Conclusions:

  • Successfully demonstrated the feasibility of printed ZnO nanoparticle-based EGTs on paper.
  • The developed EGTs exhibit promising low-voltage operation and performance metrics suitable for flexible electronics.
  • The use of eco-friendly binders and low annealing temperatures makes this approach compatible with large-scale, low-cost manufacturing on paper.