TY - JOUR
T1 - Enhancing Small-Molecule Organic Photodetector Performance for Reflectance-Mode Photoplethysmography Sensor Applications
AU - Bilgaiyan, Anubha
AU - Elsamnah, Fahed
AU - Ishidai, Hiroshi
AU - Shim, Chang Hoon
AU - Misran, Muhamad Affiq Bin
AU - Adachi, Chihaya
AU - Hattori, Reiji
N1 - Funding Information:
This research was financially supported by the Centre of Innovation Program from the Japan Science and Technology Agency, JST.
Funding Information:
The support from Kyushu University and the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan, is highly appreciated.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/5/26
Y1 - 2020/5/26
N2 - 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.
AB - 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.
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U2 - 10.1021/acsaelm.0c00082
DO - 10.1021/acsaelm.0c00082
M3 - Article
AN - SCOPUS:85104375472
SN - 2637-6113
VL - 2
SP - 1280
EP - 1288
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 5
ER -