P3HT and PEDOT:PSS printed thin films on chemiresistors: An economic and versatile tool for ammonia and humidity monitoring applications

We hereby present the fabrication of simple and efficient humidity and ammonia sensors based on a chemiresistor design employing a differential measurement technique. Interdigitated electrodes are connected via PEDOT:PSS or P3HT polymers and a reproducible and scalable fabrication procedure is prese...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied polymer science 2023-04, Vol.140 (15), p.n/a
Main Authors: Kumpf, Katarina, Trattner, Stephan, Aspermair, Patrik, Bintinger, Johannes, Fruhmann, Philipp
Format: Article
Language:English
Subjects:
Ammonia
chemiresistor
Electrodes
gas sensing
Humidity
Materials science
Measurement techniques
pneumatic nozzle printing
Polymers
Production costs
Sensors
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We hereby present the fabrication of simple and efficient humidity and ammonia sensors based on a chemiresistor design employing a differential measurement technique. Interdigitated electrodes are connected via PEDOT:PSS or P3HT polymers and a reproducible and scalable fabrication procedure is presented. This procedure utilizes pneumatic nozzle printing instead of drop or spin‐based processes and includes an optimized encapsulation procedure and material for sealing the reference electrodes. The suitability of the NH3 sensor for quantifying ammonia in a range of 2 to 100 ppm within a period of several months is furthermore presented. The developed humidity sensor is operational for several months in a humidity range between 10 and 60% RH. Once this range is exceeded, a sensor decay by irreversible saturation can be observed. Based on the low fabrication costs of the sensors (~0.5 $ when ordering 1000 pcs of the platform + printing work), they provide a very attractive tool for industrial humidity and ammonia sensing applications. We hereby present the fabrication of simple and efficient humidity and ammonia sensors based on a chemiresistor chip. The combination of PEDOT:PSS and P3HT as classical conductive polymers with pneumatic nozzle printing and simple chemiresistors was optimized to yield highly reproducible, stable and functional sensors. The parallel detailed optimization of all system parameters finally yielded an attractive and economic sensing platform for ammonia and humidity sensing purposes.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.53733