Fully Stretchable Ionically Tunable Organic Electrochemical Transistors for Wearable Adaptive Logic Bioelectronics

Area of Science:

• Materials Science
• Bioelectronics
• Organic Electronics

Background:

• Next-generation bioelectronics require soft electronic systems with mechanical stretchability, functional adaptability, and intuitive state readout.
• Existing systems often face limitations in integrating these diverse functionalities within a single architecture.

Purpose of the Study:

• To demonstrate a novel dual-doped PEDOT/PSS composite as an adaptive electrochemical medium for stretchable bioelectronics.
• To achieve ionic tunability for logic, memory, and optical visibility within a single device architecture.

Main Methods:

• Developed a dual-doping strategy for PEDOT/PSS to enhance electrical stability and mechanical robustness.
• Utilized ionic modulation within an organic electrochemical transistor (OECT) to control device function and induce electrochromism.
• Explored electrolyte modulation to tune OECTs for logic and synaptic transistor applications.

Main Results:

• The dual-doped PEDOT/PSS composite exhibited enhanced stability and robustness under deformation.
• Ionic modulation enabled OECTs to function as logic gates (inverters, NAND, NOR) and synaptic transistors with long-term memory.
• A reversible electrochromic transition provided concurrent visual display of the device's operational and memory states.

Conclusions:

• Established an ionically tunable and visually interpretable platform for interactive soft bioelectronics.
• Demonstrated the potential of this platform through mechano-electrochromic synaptic skins and wearable adaptive logic systems.
• Highlighted the dual-doped PEDOT/PSS composite as a versatile material for advanced bioelectronic applications.