OECT Circuits

Printed Circuits

Organic electro-chemical Transitors (OECTs) allow for fast and simple manufacture by screen print on large-area polymer film. Low spread of transistor characteristics enables logic circuits, where resistors are made of the same PEDOT:PSS that is required for the OECTs. In this way, integrated circuits as NAND gates, flip-flops and 2-bit shift registers, that are already more complex and versatile than simple inverters, are printed on flexible polymer foil by our group.      

Left: Functional principle of an OECT. Ions moving from the electrolyte into the semiconductor PEDOT:PSS through the gate voltage "dedope" the channel and reduce its conductivity by several orders of magnitude. Center: Microscope image of an OECT. Right: Screen printing process diagram including carbon electrodes

Screen-printed OECT circuits including resistors


Influence of geometry variations on the response of organic electrochemical transistors
P. C. Hütter et al., Appl. Phys. Lett. 103, 043308 (2013)

Nanoimprint Lithography-Structured Organic Electrochemical Transistors and Logic Circuits
T. Rothländer et al., IEEE-Transactions on Electron Dev. 61, 1515 (2014)

All Screen Printed Logic Gates Based on Organic Electrochemical Transistors, P. C. Hütter et al., IEEE Trans. Electron Devices, 62, 4231 (2015)

Efficiency of the Switching Process in Organic Electrochemical Transistors, P. C. Hütter et al., ACS Appl. Mater. Interfaces, 8, 14071 (2016)