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    Home > Chemicals Industry > New Chemical Materials > Takao Someya, a flexible electronics giant, "Nature·Communication": Ultra-flexible self-powered photonic skin realizes human physiological information

    Takao Someya, a flexible electronics giant, "Nature·Communication": Ultra-flexible self-powered photonic skin realizes human physiological information

    • Last Update: 2021-06-20
    • Source: Internet
    • Author: User
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    Because of its thinness and good flexibility, organic semiconductor devices are widely used in the next generation of wearable electronic products
    .
    Currently, flexible displays composed of organic light-emitting diodes (LEDs) have been applied to electronic devices such as smart watches and wristbands, which greatly reduces power consumption
    .
    In addition, by integrating organic LEDs and organic photodetectors, an all-organic photoelectric sensor that can be used for pulse oximetry measurement can be developed
    .
    This organic optical sensor is very flexible and can monitor the health of the human body for a long time.
    It can also reduce discomfort by attaching it directly to the skin
    .
    However, long-term health monitoring also needs to integrate this ultra-flexible optical device with an energy harvesting power supply to realize the self-powered device
    .
    Due to the insufficient working stability of ultra-flexible polymer light-emitting diodes in the air, the system-level integration of ultra-flexible optical sensors and power supplies has brought great challenges
    .
    ? Recently, the flexible electronics giant, Takao Someya's research group at the University of Tokyo, Japan has prepared an inverted structure of ultra-flexible polymer light-emitting diode devices, and doped the electron transport layer of the device, which greatly improved the air stability of the device
    .
    It also integrates light-emitting diodes, organic solar cells and organic photodetectors to build a super-flexible self-powered organic optical system to realize the monitoring of photoplethysmogram
    .
    The research was published on "Nature Communications" with the title "Self-powered ultraflexible photonic skin for continuous bio-signal detection via air-operation-stable polymer light-emitting diodes"
    .
    Highlights of the article: 1.
    Using PEIE (polyethylenimine ethoxylated) layer doped with 8-quinolinolato lithium (Liq) as the electron transport layer, organic LED devices with an inverted structure were prepared
    .
    The inherent air stability of the PEIE:Liq layer allows the device without passivation treatment to maintain 70% of the initial brightness after 11.
    3 hours of continuous operation in an air environment, which is three times that of traditional polymer light-emitting diodes (PLED)
    .
    2.
    The integrated optical sensor has a high linearity when the light intensity index of the polymer light-emitting diode is 0.
    98
    .
    3.
    The organic solar cells in the system show a power conversion efficiency (PCE) of 28.
    1% under 1000 lux indoor lighting, which satisfies the work of the entire system
    .
    ? 3.
    This ultra-flexible self-powered organic optical system can monitor the human pulse frequency (77 beats/min) within 7 seconds?? Ultra-flexible self-powered physiological signal monitoring system organic semiconductor equipment due to its thinness and good flexibility, It is widely used in the next generation of wearable electronic products
    .
    Currently, flexible displays composed of organic light-emitting diodes (LEDs) have been applied to electronic devices such as smart watches and wristbands, which greatly reduces power consumption
    .
    In addition, by integrating organic LEDs and organic photodetectors, an all-organic photoelectric sensor that can be used for pulse oximetry measurement can be developed
    .
    This organic optical sensor is very flexible and can monitor the health of the human body for a long time.
    It can also reduce discomfort by attaching it directly to the skin
    .
    However, long-term health monitoring also needs to integrate this ultra-flexible optical device with an energy harvesting power supply to realize the self-powered device
    .
    Due to the insufficient working stability of ultra-flexible polymer light-emitting diodes in the air, it brings great challenges to the system-level integration of ultra-flexible optical sensors and power supplies..
    ? Recently, the flexible electronics giant, Takao Someya's research group at the University of Tokyo, Japan, prepared an inverted structure of ultra-flexible polymer light-emitting diode devices, and doped the electron transport layer of the device, which greatly improved the air stability of the device
    .
    It also integrates light-emitting diodes, organic solar cells and organic photodetectors to build a super-flexible self-powered organic optical system to realize the monitoring of photoplethysmogram
    .
    The research was published on "Nature Communications" with the title "Self-powered ultraflexible photonic skin for continuous bio-signal detection via air-operation-stable polymer light-emitting diodes"
    .
    Highlights of the article: 1.
    Using PEIE (polyethylenimine ethoxylated) layer doped with 8-quinolinolato lithium (Liq) as the electron transport layer, organic LED devices with an inverted structure were prepared
    .
    The inherent air stability of the PEIE:Liq layer allows the device without passivation treatment to maintain 70% of the initial brightness after 11.
    3 hours of continuous operation in an air environment, which is three times that of traditional polymer light-emitting diodes (PLED)
    .
    2.
    The integrated optical sensor has a high linearity when the light intensity index of the polymer light-emitting diode is 0.
    98
    .
    3.
    The organic solar cells in the system show a power conversion efficiency (PCE) of 28.
    1% under 1000 lux indoor lighting, which satisfies the work of the entire system
    .
    3.
    This super-flexible self-powered organic optical system can monitor the human pulse frequency (77 beats/min) within 7s.
    The super-flexible self-powered physiological signal monitoring system
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