Zero waste and biodegradable zinc oxide thin-film transistors for UV sensors and logic circuits

Nogueira, G. L., Kumar, D., Zhang, S., Alves, N. and Kettle, J. (2023) Zero waste and biodegradable zinc oxide thin-film transistors for UV sensors and logic circuits. IEEE Transactions on Electron Devices, 70(4), pp. 1702-1709. (doi: 10.1109/TED.2023.3249126)

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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 × 10 6 , 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.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Kettle, Professor Jeff and Nogueira, Gabriel
Authors: Nogueira, G. L., Kumar, D., Zhang, S., Alves, N., and Kettle, J.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Electron Devices
ISSN (Online):1557-9646
Published Online:07 March 2023
Copyright Holders:Copyright © 2023 IEEE
First Published:First published in IEEE Transactions on Electron Devices 70(4): 1702-1709
Publisher Policy:Reproduced with the permission of the Publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
300137Impact Acceleration Account - University of Glasgow 2017Jonathan CooperEngineering and Physical Sciences Research Council (EPSRC)EP/R511705/1Research and Innovation Services
314917Green Energy-Optimised Printed ICsRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/W019248/1ENG - Electronics & Nanoscale Engineering