Zero Waste and Biodegradable Zinc Oxide Thin-Film Transistors for UV Sensors and Logic Circuits
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Data
2023-04-01
Autores
Nogueira, Gabriel L. [UNESP]
Kumar, Dinesh
Zhang, Shoushou
Alves, Neri [UNESP]
Kettle, Jeff
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Resumo
Bioderived and biodegradable electronics have the capability to reduce significantly waste electrical and electronics equipment (WEEE) and can also be applied to other sectors, where degradation to benign by-products is essential, such as marine, farming, or health monitoring. Herein, the authors report biodegradable thin-film transistors (TFTs) arrays based on zinc oxide (ZnO) active layer using molybdenum (Mo) source, drain, and gate electrodes. The developed TFTs were fabricated at room temperature onto a planarized biodegradable substrate surface and achieved an Ion/Ioff ratio of ∼ 4× 106 , a threshold voltage of ∼ 2.3 V, a field-effect mobility in the saturation region of 1.3 cm 2 V-1 s-1 , and a subthreshold swing of 0.3 V dec -1 and show stable device performance under stability tests. Based upon the successful fabrication of the ZnO TFT array, the demonstration of a UV sensor (phototransistors mode) and simple logic circuits (inverter and both NAND and NOR gate circuits) are presented. Furthermore, a method to 'control' the transience was implemented by using a printed heater that could accelerate the decomposition of material, which opens potential avenue for material recovery and zero waste products.
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Biodegradable electronics, molybdenum (Mo), thin-film transistors (TFTs), zinc oxide (ZnO)
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IEEE Transactions on Electron Devices, v. 70, n. 4, p. 1702-1709, 2023.