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

Elsamnah, Fahed; Bilgaiyan, Anubha; Affiq, Muhamad; Shim, Chang Hoon; Ishidai, Hiroshi; Hattori, Reiji

doi:10.3390/bios9020048

Cited by 25 publications

(26 citation statements)

References 35 publications

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“…Table 2 summarizes the PPG signal characteristics of Device-1 and Device-2. The method for quantifying the PPG signal quality using the SNR measurement was previously described in [17].…”

Section: Resultsmentioning

confidence: 99%

“…Then, the PPG signal was transmitted via serial communication block (SCB) or Bluetooth low energy (BLE). The analog circuit employed in this work was previously described, see [17] for more details. Figure 7A presents the portable pulse meter prototype that was proposed for wireless monitoring of the PPG signal, and Figure 7B illustrates the dimensions of our novel tool for fixing the biosensor pulse meter and the PCB, including the driver circuit and wireless MCU together with aluminum shield for further protection.…”

Section: Methodsmentioning

confidence: 99%

“…In terms of organic optoelectronic devices, the material structure, dimension design, and the characteristics of the OPDs and OLEDs in this paper were different to those in previous works. Here, we propose different material structures and dimensions of OLED/OPD devices based on our previous works [17,18,19] as part of our continued attempts to improve the power consumption and signal quality of organic pulse oximeter.…”

Section: Introductionmentioning

confidence: 99%

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Reflectance-Based Organic Pulse Meter Sensor for Wireless Monitoring of Photoplethysmogram Signal

et al. 2019

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This paper compares the structural design of two organic biosensors that minimize power consumption in wireless photoplethysmogram (PPG) waveform monitoring. Both devices were fabricated on the same substrate with a red organic light-emitting diode (OLED) and an organic photodiode (OPD). Both were designed with a circular OLED at the center of the device surrounded by OPD. One device had an OLED area of 0.06 cm2, while the other device had half the area. The gap distance between the OLED and OPD was 1.65 mm for the first device and 2 mm for the second. Both devices had an OPD area of 0.16 cm2. We compared the power consumption and signal-to-noise ratio (SNR) of both devices and evaluated the PPG signal, which was successfully collected from a fingertip. The reflectance-based organic pulse meter operated successfully and at a low power consumption of 8 µW at 18 dB SNR. The device sent the PPG waveforms, via Bluetooth low energy (BLE), to a PC host at a maximum rate of 256 kbps data throughput. In the end, the proposed reflectance-based organic pulse meter reduced power consumption and improved long-term PPG wireless monitoring.

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“…Table 2 summarizes the PPG signal characteristics of Device-1 and Device-2. The method for quantifying the PPG signal quality using the SNR measurement was previously described in [17].…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reflectance-Based Organic Pulse Meter Sensor for Wireless Monitoring of Photoplethysmogram Signal

et al. 2019

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“…[199,200] The Hattori group recently developed and characterized PPG sensors based on a red-emitting OLED using the phosphorescent emitter Ir(piq) 3 (peak wavelength: 625 nm) and an OPD containing a bulk heterojunction of DBP:C 60 . [201][202][203] Through optimization of device geometry and OPD layer structure, detection with signal-to-noise ratio (SNR) of 54 dB was achieved at a low power consumption of 0.6 mW. [203] The authors also demonstrated a wireless device that required even Figure 6.…”

Section: Oleds As Wearable Sensors For Health Monitoringmentioning

confidence: 99%

Emerging Biomedical Applications of Organic Light‐Emitting Diodes

Murawski

Gather

2021

Advanced Optical Materials

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As solid‐state light sources based on amorphous organic semiconductors, organic light‐emitting diodes (OLEDs) are widely used in modern smartphone displays and TVs. Due to the dramatic improvements in stability, efficiency, and brightness achieved over the last three decades, OLEDs have also become attractive light sources for compact and “imperceptible” biomedical devices that use light to probe, image, manipulate, or treat biological matter. The inherent mechanical flexibility of OLEDs and their compatibility with a wide range of substrates and geometries are of particular benefit in this context. Here, recent progress in the development and use of OLEDs for biomedical applications is reviewed. The specific requirements that this poses are described and compared to the current state of the art, in particular in terms of the brightness, patterning, stability, and encapsulation of OLEDs. Examples from several main areas are then discussed in some detail: on‐chip sensing and integration with microfluidics, wearable devices for optical monitoring, therapeutic devices, and the emerging use in neuroscience for targeted photostimulation via optogenetics. The review closes with a brief outlook on future avenues to scale the manufacturing of OLED‐based devices for biomedical use.

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“…[ 26,27 ] Still the major challenge is to balance the efficiency of these detectors with their respective sensitivity toward high‐performance color selective OPDs for, that is, biomedical monitoring and sensing applications with low power consumption. [ 28 ] Especial interest herein lies on image sensors of multiple stacked semitransparent OPDs as opposed to a typical color filter array on panchromatic photodiodes with which different wavelengths are detected spatially separated from each other. [ 29 ] This allows for an increase in the geometric fill factor of such sensors, ultimately increasing the maximum resolution of an OPD.…”

Section: Introductionmentioning

confidence: 99%

Semitransparent Layers of Social Self‐Sorting Merocyanine Dyes for Ultranarrow Bandwidth Organic Photodiodes

Schembri

Kim

Liess

et al. 2021

Advanced Optical Materials

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Two dipolar merocyanines consisting of the same π‐conjugated chromophore but different alkyl substituents adopt very different packing arrangements in their respective solid state with either H‐ or J‐type exciton coupling, leading to ultranarrow absorption bands at 477 and 750 nm, respectively, due to exchange narrowing. The social self‐sorting behavior of these push‐pull chromophores in their mixed thin films is evaluated and the impact on morphology as well as opto‐electronical properties is determined. The implementation of this well‐tuned two‐component material with tailored optical features allows to optimize planar heterojunction organic photodiodes with fullerene (C60) with either dual or single wavelength selectivity in the blue and NIR spectral range with ultranarrow bandwidths of only 11 nm (200 cm−1) and an external quantum efficiency of up to 18% at 754 nm under 0 V bias. The application of these photodiodes as low‐power consuming heart rate monitors is demonstrated by a reflectance‐mode photoplethysmography (PPG) sensor.

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

Cited by 25 publications

References 35 publications

Reflectance-Based Organic Pulse Meter Sensor for Wireless Monitoring of Photoplethysmogram Signal

Reflectance-Based Organic Pulse Meter Sensor for Wireless Monitoring of Photoplethysmogram Signal

Emerging Biomedical Applications of Organic Light‐Emitting Diodes

Semitransparent Layers of Social Self‐Sorting Merocyanine Dyes for Ultranarrow Bandwidth Organic Photodiodes

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