An Inkjet-Printed Low-Voltage Latch Based on Inorganic Electrolyte-Gated Transistors

Printed electronics is a fast-growing emerging technology, which is expected to play a major role in smart sensors for the Internet of Things domain. While there has been considerable progress at the device level by new materials, on circuit level results are still rare. In this letter, we report on the design, simulation, fabrication, and measurement of an inkjet-printedlatch, which is an essential building block for digital circuits. Our technology approach is based on electrolyte-gated transistors, which enables low-voltage operation and yields an outstanding electrical performance due to high mobility of the semiconducting, precursor-made In
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O
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channel. The fabricated latch can operate reliably down to 0.6V, where the power consumption is only 16 μW. The area requirement is about 7 mm
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, and in terms of lifetime, no performance degradation was observed during an experimental period of 12 weeks.