Enhancing Small-Molecule Organic Photodetector Performance for Reflectance-Mode Photoplethysmography Sensor Applications

Anubha Bilgaiyan, Fahed Elsamnah, Hiroshi Ishidai, Chang Hoon Shim, Muhamad Affiq Bin Misran, Chihaya Adachi, Reiji Hattori

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Organic photodetector performance for enhancing the sensing abilities of an organic photoplethysmography sensor was investigated. The optimized organic photodetector with an anode interlayer and a cathode interlayer showed a reverse dark current density of 22 nA cm-2 at -2 V and an external quantum efficiency of 53.3% at 0 V. This organic photodetector was fabricated monolithically with an organic light-emitting diode on a glass substrate to achieve a reflectance-mode photoplethysmography sensor, demonstrating the impact of organic photodetector device performance on the measured photoplethysmography signal for sensing applications. Furthermore, we estimated the optimal sensor design for circular geometry in terms of device area and distance between the organic light-emitting diode and organic photodetector to maximize the signal-to-noise ratio and lower the power consumption of organic photoplethysmography sensor devices. For the most favorable photoplethysmography sensor design, a signal strength of 130 mV with 600 μW power consumption was measured.

本文言語英語
ページ(範囲)1280-1288
ページ数9
ジャーナルACS Applied Electronic Materials
2
5
DOI
出版ステータス出版済み - 5 26 2020

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 電気化学
  • 材料化学

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