Integration of capacitive pressure sensor-on-chip with lead-free perovskite solar cells for continuous health monitoring

Abdellatif, S. O., Moustafa, A., Khalid, A. and Ghannam, R. (2023) Integration of capacitive pressure sensor-on-chip with lead-free perovskite solar cells for continuous health monitoring. Micromachines, 14(9), 1676. (doi: 10.3390/mi14091676) (PMID:37763839) (PMCID:PMC10536692)

Abstract

The increasing prevalence of hypertension necessitates continuous blood pressure monitoring. This can be safely and painlessly achieved using non-invasive wearable electronic devices. However, the integration of analog, digital, and power electronics into a single system poses significant challenges. Therefore, we demonstrated a comprehensive multi-scale simulation of a sensor-on-chip that was based on a capacitive pressure sensor. Two analog interfacing circuits were proposed for a full-scale operation ranging from 0 V to 5 V, enabling efficient digital data processing. We also demonstrated the integration of lead-free perovskite solar cells as a mechanism for self-powering the sensor. The proposed system exhibits varying sensitivity from 1.4 × 10−3 to 0.095 (kPa)−1, depending on the pressure range of measurement. In the most optimal configuration, the system consumed 50.5 mW, encompassing a 6.487 mm2 area for the perovskite cell and a CMOS layout area of 1.78 × 1.232 mm2. These results underline the potential for such sensor-on-chip designs in future wearable health-monitoring technologies. Overall, this paper contributes to the field of wearable health-monitoring technologies by presenting a novel approach to self-powered blood pressure monitoring through the integration of capacitive pressure sensors, analog interfacing circuits, and lead-free perovskite solar cells.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ghannam, Professor Rami

Creator Roles

Ghannam, R.: Validation, Resources, Writing – original draft, Writing – review and editing, Visualization, Supervision, Project administration

• Authors: Abdellatif, S. O., Moustafa, A., Khalid, A., and Ghannam, R.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Micromachines
• Publisher: MDPI
• ISSN: 2072-666X
• ISSN (Online): 2072-666X
• Copyright Holders: Copyright: © 2023 by the authors
• First Published: First published in Micromachines 14(9): 1676
• Publisher Policy: Reproduced under a Creative Commons licence