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Oxide semiconductor based deep‐subthreshold operated read‐out electronics for all‐printed smart sensor patches
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Oxide semiconductor based deep‐subthreshold operated read‐out electronics for all‐printed smart sensor patches
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Journal Article
Oxide semiconductor based deep‐subthreshold operated read‐out electronics for all‐printed smart sensor patches
2025
Overview
The ability to fabricate an entire smart sensor patch with 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. The readout circuit based on inkjet‐printed deep‐subthreshold operated thin film transistors (TFTs) based on amorphous indium‐gallium‐zinc oxide (a‐IGZO) successfully digitalizes analog sensor data and provides easy‐to‐detect visual identification of the sensor signal at a preset threshold crossover using high‐current oxide TFTs. Notably, the complete smart sensor patch is shown to operate at a low voltage of ≤2 V, assuring that the on‐chip power source is compatible.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
