High-Hole-Mobility Fiber Organic Electrochemical Transistors for Next-Generation Adaptive Neuromorphic Bio-Hybrid...

Area of Science:

• Materials Science
• Organic Electronics
• Bioelectronics

Background:

• Fibers are transitioning from passive components to active elements in smart fabrics.
• Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) fibers offer potential for wearable bioelectronics and neuromorphic applications.
• Challenges include forming stable electrodes on small, non-wettable fibers and scaling up fabrication.

Purpose of the Study:

• To develop high-performance, stable organic electrochemical transistors (OECTs) using PEDOT:PSS fibers.
• To enable continuous processing methods for scalable fiber fabrication.
• To demonstrate the potential of these fibers in bio-hybrid technologies.

Main Methods:

• Utilized synergistic effects between superior electrode/organic interfaces and fiber alignment.
• Employed continuous processing for fiber fabrication.
• Fabricated fiber-electrochemical neuromorphic organic devices (fiber-ENODes).

Main Results:

• Achieved PEDOT:PSS fiber-OECTs with stable contacts.
• Demonstrated a high µC* product of 1570.5 F cm^-1 V^-1 s^-1.
• Obtained high hole mobility exceeding 45 cm² V^-1 s^-1.

Conclusions:

• Continuous processing and improved interfaces enable high-performance PEDOT:PSS fiber-OECTs.
• Developed fiber-ENODes show synaptic weight updates in response to dopamine.
• These high-mobility fibers are promising for future bio-hybrid technologies and neuromorphic devices.