ZnO nanowires based flexible UV photodetector system for wearable dosimetry

García Núñez, C. , Vilouras, A., Navaraj, W. T., Liu, F. and Dahiya, R. (2018) ZnO nanowires based flexible UV photodetector system for wearable dosimetry. IEEE Sensors Journal, 18(19), pp. 7881-7888. (doi:10.1109/JSEN.2018.2853762)

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Abstract

This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport (CVT) technique on c-plane sapphire substrates, and thereafter, transferred and aligned at pre-defined locations on a flexible substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays of ZnO NWs based UV PDs. Resulting PDs showed photocurrent-to-dark current ratios above 103%, fast response times (<1 s), high sensitivity to different UV light intensities, and good stability under several UV/dark irradiation cycles. In addition, above PDs presented a robust response under extreme bending conditions, which is critical for their application in high-performance wearable UV dosimeters.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vilouras, Anastasios and Dahiya, Professor Ravinder and Garcia Nunez, Dr Carlos and Liu, Fengyuan and Navaraj, Mr William
Authors: García Núñez, C., Vilouras, A., Navaraj, W. T., Liu, F., and Dahiya, R.
College/School:College of Science and Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Sensors Journal
Publisher:IEEE
ISSN:1530-437X
ISSN (Online):1530-437X
Published Online:11 July 2018
Copyright Holders:Copyright © 2018 IEEE
First Published:First published in IEEE Sensors 18(19): 7881-7888
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
663861Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - ENGINEERING ELECTRONICS & NANO ENG