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A Study on the Stability of Water-Gated Organic Field-Effect-Transistors Based on a Commercial p-Type Polymer
- Source :
- Frontiers in Chemistry, Vol 7 (2019)
- Publication Year :
- 2019
- Publisher :
- Frontiers Media S.A., 2019.
-
Abstract
- Robust electrolyte-gated organic field-effect-transistors (OFETs) are particularly needed for the development of biosensing devices. However, when a FET biosensor operates in aqueous environments or even in real biological fluids, some critical issues may arise due to the possible lack of environmental long-term and/or operational stability. An important source of instability is associated with the degradation of the organic electronic channel materials such as for instance, poly-3-hexylthiophene (P3HT), a benchmark commercially available p-type organic semiconductor. In this work, the investigation of critical parameters, such as the control over spurious electrochemical phenomena as well as the operating conditions that can affect water-gated OFETs lifetime, is reported, together with a proposed modeling of the P3HT stability curve over 1 week in water. The investigation of possible morphological/chemical modifications occurring at the polymer surface after operating in water for 2 weeks was carried out. Moreover, it is proven how the addition of a gel layer can extend the P3HT based water-gated OFET shelf life up to 2 months.
Details
- Language :
- English
- ISSN :
- 22962646
- Volume :
- 7
- Database :
- Directory of Open Access Journals
- Journal :
- Frontiers in Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.11d9a7f82f8c4fae9649be361d7f5bc2
- Document Type :
- article
- Full Text :
- https://doi.org/10.3389/fchem.2019.00667