Cost-Effective PEDOT:PSS Temperature Sensors Inkjetted on a Bendable Substrate by a Consumer Printer

Polymers

Paolo Lugli¹  Aniello Falco¹  Markus Becherer²  Marco Bobinger²  Andreas Albrecht²  JoseF. Salmerón³  Almudena Rivadeneyra³ 

[1] Faculty of Science and Technology, Free University of Bolzano, 39100 Bolzano-Bozen, Italy;Institute for Nanoelectronics, Technical University of Munich, 80333 Munich, Germany;Pervasive Electronics Advanced Research Laboratory (PEARL), Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain;

关键词: inkjet printing;    PEDOT:PSS;    printed electronics;    resistive sensor;    silver nanoparticles;   

DOI  :  10.3390/polym11050824

来源: DOAJ

【 摘 要 】

In this work, we report on a fabrication protocol to produce fully inkjet-printed temperature sensors on a bendable polyethylene terephthalate (PET) substrate. The sensing layer is made of polymer-based Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) ink that is electrically contacted by an underlying interdigitated electrode (IDE) structure based on a silver nanoparticle (AgNP) ink. Both inks are available commercially, and no further ink processing is needed to print them using a cost-effective consumer printer with standard cartridges. The fabricated sensor modules are tested for different IDE dimensions and post-deposition treatments of the AgNP film for their response to a temperature range of 20 to 70 °C and moisture range of 20 to 90% RH (relative humidity). Attributed to the higher initial resistance, sensor modules with a larger electrode spacing of 200 µm show a higher thermal sensitivity that is increased by a factor of 1.8 to 2.2 when compared to sensor modules with a 150 µm-spacing. In all cases, the sensors exhibit high linearity towards temperature and a response comparable to state of the art.

【 授权许可】

Unknown