Ultra-Low-Power and Wide-Operating-Voltage-Window Capacitive Piezotronic Sensor through Coupling of Piezocharges and Depletion Widths for Tactile Sensing

Yu Liang Hsiao, Chen Jang, Yi Miao Lin, Chao Hung Wang, Chuan Pu Liu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The rapid growth of Artificial Intelligence and Internet of Things (AIoT) demands the development of ultra-low-power devices for future advanced technology. In this study, we introduce a capacitive piezotronic sensor specifically designed for tactile sensing, which enables an ultra-low-voltage operation at nearly 0 reading bias conditions with a consistent response within a wide voltage range. This sensor directly detects capacitance changes induced by piezocharges, reflecting perturbation of the effective depletion width, and ensures ultralow power capability by eliminating the necessity of turning on the Schottky diode for the first time. The dynamic response of the sensor demonstrates ultralow power capability and immunity to triboelectric interference, making it particularly suitable for tactile sensing applications in robotics, prosthetics, and wearables. This study provides valuable insights and design guidelines for future ultra-low-power thin-film-based capacitive piezotronic/piezophototronic devices for tactile sensing.

Original languageEnglish
Pages (from-to)49338-49345
Number of pages8
JournalACS Applied Materials and Interfaces
Volume15
Issue number42
DOIs
Publication statusPublished - 2023 Oct 25

All Science Journal Classification (ASJC) codes

  • General Materials Science

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