All Inkjet-Printed Temperature Sensors Based on PEDOT:PSS

Abstract

This paper develops a simple, cost-effective, fully Inkjet-printed flexible temperature sensor with easy fabrication steps using PiXDRO LP50 inkjet printer. The thermistor sensor employed a Poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT: PSS) as a temperature-sensitive layer with silver nanoparticles (AgNps) as a contact electrode. The sensor performance was evaluated on different dimensions and types of substrates. Epson Glossy paper with 255 $\mu \text{m}$ thickness and Polyimide (Kapton HN) with $50~\mu \text{m}$ thickness were used over temperatures ranging from room temperature up to 50 °C and 90 °C for paper and Kapton substrates, respectively. The sensor developed over Glossy paper showed the best sensitivity of −1.67 %/°C in the chosen temperature range while the sensor showed +0.113%/°C on PI substrate.

Keywords

• AgNP
• inkjet printer
• PEDOT:PSS
• temperature sensor
• thermistor