Abstract

Thin-film electronics has hugely benefitted from low-cost processes, large-area processability, and multifunctionality. This has not only stimulated innovation in display and sensor technology but has also demonstrated great potential for the integration of components for human–machine interfaces. For electronics to be deployed as sensor interfaces and signal processing, the quest for low power is compelling due to the inherently limited battery lifetime. This review will present the state of the art in thin-film electronics and demonstrate examples of low-cost printable transistors and biosensors that are flexible/stretchable for wearable and other applications. Ultralow-power design for thin-film transistors will be discussed from the standpoint of reducing both operating voltage and operating current, taking into account the challenges in meeting frequency requirements. Compact models for circuit design will be reviewed along with new insights into ultralow-power transistors and high-gain amplifier circuits. Finally, a concept for an integrated system comprising sensors and interfacing circuits will be demonstrated, which has the potential to enable batteryless operation.

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