Laser-Induced Graphene Electrodes for Organic Electrochemical Transistors (OECTs)

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dc.contributor.advisorGrau, Gerd
dc.contributor.authorNazeri, Mohammad
dc.date.accessioned2024-03-18T18:20:58Z
dc.date.available2024-03-18T18:20:58Z
dc.date.issued2024-03-16
dc.date.updated2024-03-16T10:37:35Z
dc.degree.disciplineElectrical and Computer Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractOrganic electrochemical transistors (OECTs) have drawn a lot of interest because of their low cost, biocompatibility, and ease of fabrication, allowing them to be utilized in various applications including flexible displays, electrochemical sensing, and biosensing. Key components of OECTs are the gate, source, and drain electrodes. Here, OECTs with laser-induced graphene (LIG) electrodes are presented. The electrode patterns for the source, drain, and gate are created by lasing the polymer substrate polyimide (PI). The entire process is simple and inexpensive without complicated chemical synthesis routines or expensive materials such as gold. Patterns can be customized quickly and digitally. Different laser parameters play an important role in changing the conductivity and porosity of the graphene leading to its use in different applications. The low-cost and porous LIG electrodes with low contact resistance, good electrical stability, and adhesion to the polymeric substrate play an essential role in device performance. Due to the flexibility of the laser process, source, drain, and gate can potentially have different properties even though they are fabricated together in a co-planar architecture. The minimum sheet resistance achieved with this laser method for the square patterned electrodes is 7.86 Ω/sq. The LIG-based OECTs demonstrate good electrical modulation and high on-current. The LIG-based OECT shows low OFF current in the order of 0.035 mA.
dc.identifier.urihttps://hdl.handle.net/10315/41977
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectElectrical engineering
dc.subjectMaterials Science
dc.subjectChemistry
dc.subject.keywordsOrganic electrochemical transistors (OECT)
dc.subject.keywordsLaser-induced graphene (LIG)
dc.subject.keywordsPolyimide
dc.subject.keywordsPEDOT:PSS
dc.subject.keywordsDigital manufacturing
dc.subject.keywordsInkjet printing
dc.titleLaser-Induced Graphene Electrodes for Organic Electrochemical Transistors (OECTs)
dc.typeElectronic Thesis or Dissertation

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