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Simplified large-area manufacturing of organic electrochemical transistors combining printing and a self-aligning laser ablation step

: Blaudeck, T.; Ersman, P.A.; Sandberg, M.; Heinz, S.; Laiho, A.; Liu, J.; Engquist, I.; Berggren, M.; Baumann, R.R.


Advanced Functional Materials 22 (2012), Nr.14, S.2939-2948
ISSN: 1616-301X
ISSN: 1616-3028
Fraunhofer ENAS ()

A hybrid manufacturing approach for organic electrochemical transistors (OECTs) on flexible substrates is reported. The technology is based on conventional and digital printing (screen and inkjet printing), laser processing, and post-press technologies. A careful selection of the conductive, dielectric, and semiconductor materials with respect to their optical properties enables a self-aligning pattern formation which results in a significant reduction of the usual registration problems during manufacturing. For the prototype OECTs, based on this technology, on/off ratios up to 600 and switching times of 100 milliseconds at gate voltages in the range of 1 V were obtained.