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Photo-Patternable PEDOT:PSS for High Performance Organic Electrochemical Transistors
Charles-Théophile Coen1,2, Niels J Burghoorn1,2, Jonas G Hendrikx3
1Department of Mechanical Engineering, Microsystems, Eindhoven University of Technology, Eindhoven, The Netherlands.
Advanced Materials (Deerfield Beach, Fla.)
|March 18, 2026
Summary
Researchers developed a new photo-patternable organic mixed ionic-electronic conductor (OMIEC). This advancement enables precise fabrication of complex bio-electronic circuits, overcoming limitations of current methods.
Area of Science:
- Materials Science
- Biotechnology
- Electronics Engineering
Background:
- Organic mixed ionic-electronic conductors (OMIECs) uniquely bridge biological (ionic) and electronic systems.
- Current fabrication methods for OMIECs, like peel-off, hinder complex circuit integration.
- Developing advanced bio-electronic interfaces requires compatible patterning techniques.
Purpose of the Study:
- To develop a photo-patternable OMIEC for advanced microfabrication.
- To enable the creation of miniaturized and highly integrated bio-electronic circuits.
- To overcome the limitations of traditional OMIEC patterning techniques.
Main Methods:
- A photo-sensitive interpenetrating network was blended with PEDOT:PSS to create a photo-patternable OMIEC.
- Photolithography was employed to pattern features as small as 2 µm on various substrates.
- Organic electrochemical transistors were fabricated using the new photo-patterning process.
Main Results:
- The photo-patternable PEDOT:PSS allows for precise feature definition down to 2 µm.
- The developed process retains the OMIEC's ionic and electronic charge transport capabilities.
- Fabricated organic electrochemical transistors demonstrated superior performance and low batch-to-batch variability (<5%) compared to existing methods.
Conclusions:
- The photo-patterning process facilitates monolithic fabrication of complex OMIEC circuits.
- This innovation pushes the boundaries of miniaturized and integrated bio-electronic systems.
- The technique offers a scalable solution for advanced bio-interfacing technologies.
