Reflectance-based monolithic organic pulsemeter device for measuring photoplethysmogram signal

Elsamnah, Fahed; Hattori, Reiji; Affiq, Muhamad; Cs, Shim; Bilgaiyan, Anubha; Sugawara, Ryutaro

doi:10.1109/i2mtc.2018.8409873

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…Obtaining the photoplethysmogram (PPG) signal based on an organic pulse meter: ( A ) Transmissive mode; ( B ) Reflective mode [11]. …”

Section: Figurementioning

confidence: 99%

“…Moreover, the dimension design, the material structure, and the characteristics of the OLED and OPD in this work are different than those in previous works. Consequently, we proposed and compared different dimensions and material structures based on our previous works in [11,19] as part of our continuous research into improving the power consumption and the signal quality of portable pulse meters, and highlighted the significance of the optical simulation in designing the OLED and the OPD.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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.

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“…Obtaining the photoplethysmogram (PPG) signal based on an organic pulse meter: ( A ) Transmissive mode; ( B ) Reflective mode [11]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…[17][18][19] Recently, there have been successful demonstrations of several PPG sensors employing organic LEDs (OLEDs) and PDs (OPDs). [24][25][26][27][28][29][30][31][32][33][34] With designing device patterns, the organic PPG sensors exhibit a significant decrease in power consumption when compared to those relying on inorganic semiconductors. [24,[34][35][36] However, current organic PPG sensors have yet to tackle a common challenge faced by optical PPG sensors: the difficulty in isolating a vital pulsating (AC) signal amidst a noisy and constantly shifting non-pulsating (DC) component.…”

Section: Introductionmentioning

confidence: 99%

Organic Photoplethysmography Sensor Based on Directional Emission Microcavity Organic Light‐Emitting Device

Zhu,

Yu,

Zhang

et al. 2024

Laser & Photonics Reviews

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Wearable photoplethysmography (PPG) sensors provide real‐time monitoring of essential human health parameters by integrating a light source with a photodetector. However, they face a common challenge: the presence of a faint pulsating (AC) signal amidst a highly noisy and drifting non‐pulsatile background. This necessitates fine‐tuning how the light is spread out to make sure that a significant number of emitted photons carry vital physiological information and trigger the detector's photocurrent. An innovative organic PPG sensor with a microcavity organic light‐emitting diode (OLED) that emits light in a controlled direction, coupled with an annular organic photodetector (OPD) is demonstrated here. By adjusting the OLED's cavity lengths, the microcavity resonance peak is shifted, achieving angled directional emission. Placing the microcavity OLEDs at the center of the annular OPD enhances the portion of light that reflects from arterial vessels in the skin and tissues. This increases the AC signal for recording arterial vessel pulsations by 47.66%. This advancement simplifies sensor recognition and achieves an unprecedented low power consumption of only 9.96 µW for heart rate sensing, meeting essential recognition criteria.

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“…Conventional pulse oximeters, being configured as either a transmissive or a reflective type, are based on inorganic light-emitting diodes (LEDs) made of III–V compound semiconductors and Si photodiodes. , However, these systems often require a high power consumption values and emit in the visible region resulting in high tissue absorption. , As an alternative, new reflective type oximeter systems, based on organic LEDs (OLEDs) and organic photodiodes (OPDs) are now being proposed. ,,,,− OLED technology, which is widely used in modern devices, is now rapidly developing in new applications. − Due to its planar structure and the possibility of obtaining a flexible device covering a large area, OLEDs can be used as light sources for oximeters in the reflection mode. OLED’s main drawback is the stability issue, which is not relevant for disposable medical sensors, as in contrast to long-term applications oximetry requires significantly shorter device operating time. , …”

Section: Introductionmentioning

confidence: 99%

First Dual Red–Near-Infrared Emissive Solution-Processed Organic Light-Emitting Diode Based on Europium–Ytterbium Mixed-Ligand Complexes for Pulse Oximetry

Kornikov

Kozlov

Vashchenko

et al. 2023

ACS Appl. Opt. Mater.

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For oximetry applications, the first dual red−near-infrared (NIR) emissive organic light-emitting diode (OLED) based on mixed-ligand complexes Eu x Yb 1−x (dbm) 3 BPhen (x = 0; 0.01; 0.02; 0.05; 0.1; 1) is obtained. The photoluminescence quantum yields of the ytterbium and europium in the obtained complexes reach 0.9 and 31%, respectively, which are rather high values for the complexes of these ions. Dual visible−NIR emissive compounds Eu x Yb 1−x (dbm) 3 BPhen are tested in OLEDs, and Eu 0.05 Yb 0.95 (dbm) 3 BPhen demonstrates the most intense electroluminescence both in visible (270 cd/m 2 ) and NIR range (19 μW/cm 2 ). The Eu 0.05 Yb 0.95 (dbm) 3 BPhen-based OLED is successfully used to produce the first lanthanide OLED-based pulsimeter prototype.

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Reflectance-based monolithic organic pulsemeter device for measuring photoplethysmogram signal

Cited by 6 publications

References 9 publications

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

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

Organic Photoplethysmography Sensor Based on Directional Emission Microcavity Organic Light‐Emitting Device

First Dual Red–Near-Infrared Emissive Solution-Processed Organic Light-Emitting Diode Based on Europium–Ytterbium Mixed-Ligand Complexes for Pulse Oximetry

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