Spray-On Liquid-Metal Electrodes for Graphene Field-Effect Transistors
AbstractAdvancements in flexible circuit interconnects are critical for widespread adoption of flexible electronics. Non-toxic liquid-metals offer a viable solution for flexible electrodes due to deformability and low bulk resistivity. However, fabrication processes utilizing liquid-metals suffer from high complexity, low throughput, and significant production cost. Our team utilized an inexpensive spray-on stencil technique to deposit liquid-metal Galinstan electrodes in top-gated graphene field-effect transistors (GFETs). The electrode stencils were patterned using an automated vinyl cutter and positioned directly onto chemical vapor deposition (CVD) graphene transferred to polyethylene terephthalate (PET) substrates. Our spray-on method exhibited a throughput of 28 transistors in under five minutes on the same graphene sample, with a 96% yield for all devices down to a channel length of 50 μm. The fabricated transistors possess hole and electron mobilities of 663.5 cm2/(V·s) and 689.9 cm2/(V·s), respectively, and support a simple and effective method of developing high-yield flexible electronics. View Full-Text
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Melcher, J.L.; Elassy, K.S.; Ordonez, R.C.; Hayashi, C.; Ohta, A.T.; Garmire, D. Spray-On Liquid-Metal Electrodes for Graphene Field-Effect Transistors. Micromachines 2019, 10, 54.
Melcher JL, Elassy KS, Ordonez RC, Hayashi C, Ohta AT, Garmire D. Spray-On Liquid-Metal Electrodes for Graphene Field-Effect Transistors. Micromachines. 2019; 10(1):54.Chicago/Turabian Style
Melcher, Jordan L.; Elassy, Kareem S.; Ordonez, Richard C.; Hayashi, Cody; Ohta, Aaron T.; Garmire, David. 2019. "Spray-On Liquid-Metal Electrodes for Graphene Field-Effect Transistors." Micromachines 10, no. 1: 54.
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