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    Simplified Large-Area Manufacturing of Organic Electrochemical Transistors Combining Printing and a Self-Aligning Laser Ablation Step

    Year: 2012

    Journal: Advanced functional materials 2012, 22 (14), pp 2939-2948, 20121211

    Authors: Thomas Blaudeck, Peter Andersson Ersman, Mats Sandberg, Sebastian Heinz, Ari Laiho, Jiang Liu, Isak Engquist, Magnus Berggren and Reinhard R. Baumann

    Organizations: Linköping University, Department of Science and Technology (ITN), Organic Electronics, 60174 Norrköping, Sweden; Chemnitz University of Technology, Institute for Print and Media Technology, 09107 Chemnitz, Germany; Chemnitz University of Technology, Center for Microtechnologies, 09107 Chemnitz, Germany; Acreo AB, Printed Electronics, 60221 Norrköping, Sweden; Aalto University School of Science and Technology, Advanced Magnetic Imaging Centre, 02150 Espoo, Finland; Fraunhofer Institute for Electronic Nanosystems (ENAS), Department Printed Functionalities, 09126 Chemnitz, Germany

    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.