Fast and edible transistors based on organic semiconductors

In this contribution I will report on our recent progress in high-speed operation of solution-processed organic field-effect transistors (OFETs) and in realizing fully edible electrolyte-gated organic transistors (EGOTs). Far-field, meters distance communication is possible within the Ultra-High Frequency (UHF) range, e.g. hundreds of MHz – GHz range, which is precluded to OFETs for several long-standing challenges, including resolution in patterning tools, electronic properties of printed materials, contact injection issues and parasitism. Here I will report on our recent progress in addressing such challenges with printed OFETs. Then I will move to discuss the need for edible EGOTs, as a fundamental building block of future edible electronics, which envisions a technology that is safe for ingestion, environmentally friendly, and cost-effective. Edible electronics could potentially target a significant number of biomedical applications, such as remote healthcare monitoring, and of applications for food quality monitoring as well. Here I will report on our investigations on edible and potentially edible semiconductors, and their use in fully edible EGOT architectures.