Oxide semiconductor based deep-subthreshold operated read-out electronics for all-printed smart sensor patches
Jyoti Ranjan Pradhan , Sushree Sangita Priyadarsini , Sanjana R. Nibgoor , Manvendra Singh , Subho Dasgupta
Exploration ›› 2025, Vol. 5 ›› Issue (1) : 20230167
Oxide semiconductor based deep-subthreshold operated read-out electronics for all-printed smart sensor patches
The ability to fabricate an entire smart sensor patchwith read-out electronics using commercial printing techniques may have a wide range of potential applications. Although solution-processed oxide thin film transistors (TFTs) are capable of providing high mobility electron transport, resulting in large ON-state current and power output, there is hardly any literature report that uses the printed oxide TFTs at the sensor interfaces. Here, printed amorphous indium-gallium-zinc oxide (a-IGZO)-based deep-subthreshold operated TFTs that comprise signal amplifiers and analog-to-digital converters (ADCs) that can successfully digitalize the analog sensor signals up to a frequency range of 1 kHz are reported. In addition, exploiting the high current oxide TFTs, a current drive circuit placed after the ADC unit has been found useful in producing easy-to-detect visual recognition of the sensor signal at a predefined threshold crossover. Notably, the entire smart sensor patch is demonstrated to operate at a low supply voltage of ≤2 V, thereby ensuring that it can be an on-chip energy source compatible and standalone detection unit.
analog-to-digital converter / inkjet printing / printed oxide electronics / printed read-out electronics / smart sensor patches / thin film transistors
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2024 The Author(s). Exploration published by Henan University and JohnWiley & Sons Australia, Ltd.
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