Fabrication of cost effective flexible resistive temperature sensor based on poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) via all printed technologies

A flexible temperature sensor is becoming increasingly essential across various fields due to its adaptability, which aligns with current trends and technological advancements, enabling precise measurements. This study focuses on optimizing a flexible temperature sensor with various patterns using interdigital electrodes (IDE) made of silver nanoparticles (AgNPs) in conjunction with the sensing material Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The deposition process employs a spin-coating technique on a polyethylene terephthalate (PET) substrate. The proposed sensor exhibits a detection range from 290 to 360 K and comes in three sizes: 5 mm, 20 mm, and 22 mm. The resistance–temperature relationship ranges from 0.2 Ω to 0.9 Ω, 0.1 Ω to 0.9 Ω, and 2.0 Ω to 5.0 Ω. Experimental results indicate that a sensor with a height of 21 mm and a width of 2 mm yields superior performance across all the mentioned characteristics, meeting the requirements for real-time fabrication and long-term temperature monitoring.