Optimizing performance of reflectance-based organic Photoplethysmogram (PPG) sensor

A. Bilgaiyan, R. Sugawara, F. Elsamnah, C. Shim, Md Affiq, R. Hattori

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

6 被引用数 (Scopus)


Wearable sensors enable the continuous monitoring of various physiological conditions of individuals without constraints on time and place. Primary vital signs of human body such as; heart rate (HR), Oxygen saturation (SpO2) and respiration rate, can be extracted from the PPG signal. In comparison to conventional inorganic based sensors, the use of organic semiconductor-based devices opens the possibility of devising inexpensive, lightweight, flexible sensors. Reflection-mode PPG sensors overcome the limitations posed by transmission-mode PPG sensor as it can be positioned anywhere on the body. The state of art has not exploited the reflection-mode of PPG sensors extensively, as opposed to transmission-mode. In this work, we have fabricated reflection mode PPG sensor, which comprises of a red (631 nm) organic light emitting diode (OLED) (EQE = 8%) and organic photodetector (OPD) (EQE =47 %) on the same substrate. With motivation to improve the existing PPG sensing technologies, OLED and OPD performances were optimized on a single substrate. Further, we have estimated the best pattern and optimal distance between OLED and OPD in order to maximize signalnoise ratio and lower the power consumption of the device. An analog circuit is designed to read out PPG signals. For realtime pulse monitoring, the signals were sent via a Bluetooth interface to the computer. In summary, a low cost, organic based sensor is developed to detect the heart rate with wireless enabled data monitoring. Our device displayed promising results with 1.5 % error in the heart rate measurement compared to the commercial reference.

ホスト出版物のタイトルOrganic and Hybrid Sensors and Bioelectronics XI
編集者Ioannis Kymissis, Emil J. W. List-Kratochvil, Ruth Shinar, Luisa Torsi
出版ステータス出版済み - 2018
イベントOrganic and Hybrid Sensors and Bioelectronics XI 2018 - San Diego, 米国
継続期間: 8月 19 20188月 22 2018


名前Proceedings of SPIE - The International Society for Optical Engineering


その他Organic and Hybrid Sensors and Bioelectronics XI 2018
CitySan Diego

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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