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Subthreshold operation of organic electrochemical transistors for biosignal amplification
- Source :
- Advanced Science
- Publication Year :
- 2018
- Publisher :
- Wiley Open Access, 2018.
-
Abstract
- With a host of new materials being investigated as active layers in organic electrochemical transistors (OECTs), several advantageous characteristics can be utilized to improve transduction and circuit level performance for biosensing applications. Here, the subthreshold region of operation of one recently reported high performing OECT material, poly(2‐(3,3′‐bis(2‐(2‐(2‐methoxyethoxy)ethoxy)ethoxy)‐[2,2′‐bithiophen]‐5‐yl)thieno[3,2‐b]thiophene), p(g2T‐TT) is investigated. The material's high subthreshold slope (SS) is exploited for high voltage gain and low power consumption. An ≈5× improvement in voltage gain (A V) for devices engineered for equal output current and 370× lower power consumption in the subthreshold region, in comparison to operation in the higher transconductance (g m), superthreshold region usually reported in the literature, are reported. Electrophysiological sensing is demonstrated using the subthreshold regime of p(g2T‐TT) devices and it is suggested that operation in this regime enables low power, enhanced sensing for a broad range of bioelectronic applications. Finally, the accessibility of the subthreshold regime of p(g2T‐TT) is evaluated in comparison with the prototypical poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and the role of material design in achieving favorable properties for subthreshold operation is discussed.
- Subjects :
- ELECTRODE ARRAY
Technology
Materials science
General Chemical Engineering
Transconductance
Chemistry, Multidisciplinary
Materials Science
General Physics and Astronomy
Medicine (miscellaneous)
Materials Science, Multidisciplinary
02 engineering and technology
010402 general chemistry
MICROELECTRODE ARRAY
01 natural sciences
Biochemistry, Genetics and Molecular Biology (miscellaneous)
ECOG
law.invention
subthreshold
PEDOT:PSS
DESIGN
law
General Materials Science
Biosignal
electroencephalography (EEG)
INSTRUMENTATION AMPLIFIER
Nanoscience & Nanotechnology
Science & Technology
Full Paper
Subthreshold conduction
business.industry
Transistor
General Engineering
High voltage
Full Papers
021001 nanoscience & nanotechnology
Subthreshold slope
organic electrochemical transistors
0104 chemical sciences
INTERFACE
Chemistry
Physical Sciences
voltage amplifiers
PAPER
Optoelectronics
Science & Technology - Other Topics
0210 nano-technology
business
Voltage
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Advanced Science
- Accession number :
- edsair.doi.dedup.....a3449b301f4d6775dbdc260bb921e634