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High‐Accuracy Photoplethysmography Array Using Near‐Infrared Organic Photodiodes with Ultralow Dark Current
Author(s) -
Simone Giulio,
Tordera Daniel,
Delvitto Ezequiel,
Peeters Bart,
Breemen Albert J. J. M.,
Meskers Stefan C. J.,
Janssen René A. J.,
Gelinck Gerwin H.
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201901989
Subject(s) - photoplethysmogram , photodiode , materials science , pixel , infrared , optics , waveform , pulse oximetry , optoelectronics , dark current , near infrared spectroscopy , biomedical engineering , photodetector , computer science , telecommunications , medicine , physics , wireless , radar , anesthesia
Reflectance oximeters based on organic photodiode (OPD) arrays offer the potential to map blood pulsation and oxygenation via photoplethysmography (PPG) over a large area and beyond the traditional sensing locations. Here, an organic reflectance PPG array based on 16 × 16 OPD pixels is developed. The individual pixels exhibit near‐infrared sensitivity up to ≈950 nm and low dark current density in the order of 10 −6 mA cm −2 . This results in high‐quality PPG signals. Analysis of the full PPG waveform yields insight on the artery stiffness and the quality of blood circulation, demonstrating the potential of these arrays beyond pulse oximetry and heart‐rate calculation.