PEDOT:PSS coated screen printed graphene-carbon ink based humidity and temperature sensor

Beniwal, A. , Neethipathi, D. K. and Dahiya, R. (2023) PEDOT:PSS coated screen printed graphene-carbon ink based humidity and temperature sensor. IEEE Journal on Flexible Electronics, 2(2), pp. 111-118. (doi: 10.1109/JFLEX.2022.3228970)

Abstract

This work presents a multifunctional humidity and temperature sensor, fabricated on a flexible polyvinyl chloride (PVC) substrate using a facile screen-printing and drop casting. The sensor comprises of screen-printed graphene-carbon (G-C) layer coated with Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The sensor displays good sensing performance (~1%/%RH) towards wide humidity range (25 %RH - 90 %RH) at room temperature (RT; 27 °C ± 2 °C). The influence of operating temperature on humidity sensing performance is examined in the temperature range of 15 - 55 °C and a nearly linear relation (with Adj. R 2 of value 0.959) is observed towards change in temperature (35 to 55 °C). Further, temperature sensing performance of the sensor is analysed in 15 - 35 °C temperature range. The sensor displays good performance with temperature coefficient of resistance as -3.18 % °C -1 and -1.3 % °C -1 for 15-25 °C and 25-35 °C, respectively. Other important sensing characteristics like repeatability, hysteresis, response, and recovery times are also analysed and presented here.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Neethipathi, Mr Deepan and Dahiya, Professor Ravinder and Beniwal, Dr Ajay
• Authors: Beniwal, A., Neethipathi, D. K., and Dahiya, R.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: IEEE Journal on Flexible Electronics
• Publisher: IEEE
• ISSN: 2768-167X
• ISSN (Online): 2768-167X
• Published Online: 12 December 2022
• Copyright Holders: Copyright © 2022 IEEE
• First Published: First published in IEEE Journal on Flexible Electronics 2(2):111 - 118
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
301728		Engineering Fellowships for Growth: Printed Tactile SKIN	Ravinder Dahiya	Engineering and Physical Sciences Research Council (EPSRC)	EP/R029644/1	ENG - Electronics & Nanoscale Engineering
303114		Innovative Network for Training in Water and Food Quality using Disposable Sensors,	Ravinder Dahiya	European Commission (EC)	813680	ENG - Electronics & Nanoscale Engineering