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Comparative Design Study for Power Reduction in Organic Optoelectronic Pulse Meter Sensor

1
Department of Applied Science for Electronics and Materials, Kyushu University, Fukuoka 816-8580, Japan
2
COI STREAM, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka 819-0395, Japan
3
Hiroshi Ishidai, Konica Minolta, Inc., Ishikawa-cho, Hachioji 192-8505, Japan
4
Global Innovation Center (GIC), Kyushu University, Fukuoka 816-8580, Japan
*
Author to whom correspondence should be addressed.
Biosensors 2019, 9(2), 48; https://doi.org/10.3390/bios9020048
Received: 21 February 2019 / Revised: 22 March 2019 / Accepted: 25 March 2019 / Published: 29 March 2019
(This article belongs to the Special Issue In Vivo Physiological Monitoring)
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Abstract

This paper demonstrated a new design structure for minimizing the power consumption of a pulse meter. Monolithic devices composed of a red (625 nm) organic light-emitting diode (OLED) and an organic photodiode (OPD) were fabricated on the same substrate. Two organic devices were designed differently. One had a circle-shaped OLED in the center of the device and was surrounded by the OPD, while the other had the opposite structure. The external quantum efficiency (EQE) of the OLED and the OPD were 7% and 37%, respectively. We evaluated and compared the signal-to-noise ratio (SNR) of the photoplethysmogram (PPG) signal on different parts of the body and successfully acquired clear PPG signals at those positions, where the best signal was obtained from the fingertip at a SNR of about 62 dB. The proposed organic pulse meter sensor was operated successfully with a power consumption of 0.1 mW. Eventually, the proposed organic biosensor reduced the power consumption and improved the capability of the pulse meter for long-term use. View Full-Text
Keywords: organic optoelectronic device; pulse meter; biosensor; photoplethysmogram (PPG) organic optoelectronic device; pulse meter; biosensor; photoplethysmogram (PPG)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Elsamnah, F.; Bilgaiyan, A.; Affiq, M.; Shim, C.-H.; Ishidai, H.; Hattori, R. Comparative Design Study for Power Reduction in Organic Optoelectronic Pulse Meter Sensor. Biosensors 2019, 9, 48.

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