Organic electrochemical transistors (OECTs) are widely used as amplifying transducers of biological signals due to their high transconductance and biocompatibility. For implantable applications that penetrate into tissue, OECTs need to be integrated onto narrow probes. The scarcity of real estate necessitates the use of small local gate electrodes and narrow interconnects. This work shows that both of these factors lead to a decrease in the maximum transconductance and an increase in gate voltage required to attain this maximum. This work further shows that coating the gate electrode with a thick conducting polymer improves performance. These findings help guide the development of efficient OECTs on implantable probes.
Bibliographical noteKAUST Repository Item: Exported on 2021-08-27
Acknowledged KAUST grant number(s): OSR-2016-CRG5-3003
Acknowledgements: This work was supported by the Natural Environment Research Council (NERC) under award No. NE/T012293/1, the European Union's Horizon 2020 Research and Innovation Programme under grant agreement No. 732032 (BrainCom), and the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award No. OSR-2016-CRG5-3003.