The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan.
JOANNEUM RESEARCH Forschungsgesellschaft mbH, MATERIALS-Institute for Surface Technologies and Photonics, Weiz, Austria.
Nat Commun. 2021 Apr 23;12(1):2399. doi: 10.1038/s41467-021-22663-6.
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.
能源自主性和贴合性是医疗保健、机器人技术和网络物理系统下一代可穿戴和灵活电子产品的关键要素。本研究提出了用于隐形感测和能量收集系统的铁电聚合物换能器和有机二极管，它们集成在超薄（1-µm）衬底上，从而赋予其优异的柔韧性。模拟表明，使用超薄衬底可大大增强超柔韧铁电聚合物换能器的灵敏度，这使其能够安装在 3D 形状的物体上，并可进行多层堆叠。事实上，超柔韧铁电聚合物换能器对应变和压力的灵敏度更高，响应速度更快，机械稳定性更好，从而形成了用于精确脉搏和血压监测的隐形无线电子健康贴片。为了收集生物力学能量，换能器与基于超柔韧有机二极管的整流器相结合，从而构成了一种隐形的、2.5-µm 厚的能量收集装置，其卓越的峰值功率密度为 3mW·cm。
