Abstract
Background: Poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) (PEDOT:PSS) is a promising conductive polymer for the flexible piezoresistive pressure sensor. However, intrinsic hydrophilicity is detrimental to its structural stability under moisture. The present study aims to enhance piezoresistive pressure sensors' stability to achieve the highly-reliable electronic device applications. Method: ITO/PEDOT:PSS/ITO piezoresistive pressure sensors with an interdigitated electrode (IDE) structure and different metallic interfacial layers were fabricated. Au layer was introduced between PEDOT:PSS sensing membrane and indium tin oxide (ITO) electrode as a reaction-inhibited interfacial coating of piezoresistive pressure sensors. Significant findings: After a measurement time interval of 6 months, the interface reaction suppressed significantly, resulting in low sensitivity deviation (9.22%) and improved durability (400 cycles). The devices are completely sealed using polyethylene terephthalate packaging, avoiding humidity absorption in PEDOT:PSS films successfully. The packaged ITO/PEDOT:PSS/ITO piezoresistive pressure sensors with a double-sided 10-nm-thick Au interfacial layer is a promising candidate for use in highly reliable pressure sensing applications.
| Original language | English |
|---|---|
| Pages (from-to) | 297-306 |
| Number of pages | 10 |
| Journal | Journal of the Taiwan Institute of Chemical Engineers |
| Volume | 126 |
| DOIs | |
| State | Published - 09 2021 |
Bibliographical note
Publisher Copyright:© 2021 Taiwan Institute of Chemical Engineers
Keywords
- Poly(3,4-ethylenedioxythiophene): poly-(styrenesulfonate) (PEDOT:PSS), Indium tin oxide (ITO), Piezoresistive pressure sensor, Interfacial coating, Polyethylene terephthalate (PET), Package