Systematic Review on Fabrication, Properties, and Applications of Advanced Materials in Wearable Photoplethysmography Sensors

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Abstract

Photoplethysmography (PPG) technology enables the measurement of multiple physiological and psychological parameters with low‐cost wearable sensors and is reshaping modern healthcare. Advanced materials play a vital role in improving reliability and accuracy of PPG sensors. Recently, various advanced materials have been explored to optimize PPG sensor design, while some challenges exist toward large‐scale validation and mass production. This paper focuses on advanced materials applied in the photodetectors, light sources, and circuits of PPG sensors. The materials are categorized into four groups: inorganic, organic, nanomaterials, and hybrid materials. The properties and fabrication processes are summarized. Other technical details including the mode of operation, measurement sites, testing, and validation are discussed. The merits and limitations of the state of the art are highlighted to provide some suggestions for the future development of PPG sensors based on advanced materials.
Original languageEnglish
Article number2300765
Pages (from-to)(In-Press)
Number of pages21
JournalAdvanced Electronic Materials
Volume(In-Press)
Early online date11 Mar 2024
DOIs
Publication statusE-pub ahead of print - 11 Mar 2024

Bibliographical note

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Funder

Horizontal Technology Coordinating Office Seed Fund, Singapore. Grant Number: C231218001
A⋆STAR (Agency for Science, Technology and Research)

Keywords

  • inorganic materials
  • nanomaterials
  • organic materials
  • photodetectors
  • photoplethysmography
  • wearable sensors

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