Modeling the CO gas response of PEDOT:PSS/ Fe(salen) thin film for a gas sensor

A thin film carbon monoxide (CO) gas sensor based on PEDOT:PSS/Fe(salen) was developed in this study using the spin coating technique on several glass pieces with interdigitated Au electrodes. The change in the electrical resistance of sensors with different dopant contents was measured in different ranges of CO gas concentrations and temperatures. It was found that Fe (salen) as a dopant element could significantly improve the performance of PEDOT:PSS-based sensors. Least Square Support Vector Machine (LSSVM) method was applied to predict the response characteristics of the films in different testing conditions. Modeling results showed satisfactory agreement with experimental findings. © 2020 Sharif University of Technology. All rights reserved.