Imperceptible energy harvesting device and biomedical sensor based on ultraflexible ferroelectric transducers and organic diodes

Andreas Petritz, Esther Karner-Petritz, Takafumi Uemura, Philipp Schäffner, Teppei Araki, Barbara Stadlober () and Tsuyoshi Sekitani ()
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Andreas Petritz: Osaka University
Esther Karner-Petritz: Osaka University
Takafumi Uemura: Osaka University
Philipp Schäffner: MATERIALS-Institute for Surface Technologies and Photonics
Teppei Araki: Osaka University
Barbara Stadlober: MATERIALS-Institute for Surface Technologies and Photonics
Tsuyoshi Sekitani: Osaka University

Nature Communications, 2021, vol. 12, issue 1, 1-14

Abstract: Abstract Energy autonomy and conformability are essential elements in the next generation of wearable and flexible electronics for healthcare, robotics and cyber-physical systems. This study presents ferroelectric polymer transducers and organic diodes for imperceptible sensing and energy harvesting systems, which are integrated on ultrathin (1-µm) substrates, thus imparting them with excellent flexibility. Simulations show that the sensitivity of ultraflexible ferroelectric polymer transducers is strongly enhanced by using an ultrathin substrate, which allows the mounting on 3D-shaped objects and the stacking in multiple layers. Indeed, ultraflexible ferroelectric polymer transducers have improved sensitivity to strain and pressure, fast response and excellent mechanical stability, thus forming imperceptible wireless e-health patches for precise pulse and blood pressure monitoring. For harvesting biomechanical energy, the transducers are combined with rectifiers based on ultraflexible organic diodes thus comprising an imperceptible, 2.5-µm thin, energy harvesting device with an excellent peak power density of 3 mW·cm−3.

Date: 2021
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DOI: 10.1038/s41467-021-22663-6

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