Polarized Water Driven Dynamic PN Junction-Based Direct-Current Generator

作者：Yanghua Lu, Yanfei Yan, Xutao Yu, Xu Zhou, Sirui Feng, Chi Xu, Haonan Zheng, Zunshan Yang, Linjun Li, Kaihui Liu, Shisheng Lin · 发表于：Research · 年份：2021 · DOI：10.34133/2021/7505638 · 被引用次数：53 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Energy Harvesting in Wireless Networks、Innovative Energy Harvesting Technologies

There is a rising prospective in harvesting energy from the environment, as in situ energy is required for the distributed sensors in the interconnected information society, among which the water flow energy is the most potential candidate as a clean and abundant mechanical source. However, for microscale and unordered movement of water, achieving a sustainable direct-current generating device with high output to drive the load element is still challenging, which requires for further exploration. Herein, we propose a dynamic PN water junction generator with moving water sandwiched between two semiconductors, which outputs a sustainable direct-current voltage of 0.3 V and a current of 0.64 μ A. The mechanism can be attributed to the dynamic polarization process of water as moving dielectric medium in the dynamic PN water junction, under the Fermi level difference of two semiconductors. We further demonstrate an encapsulated portable power-generating device with simple structure and continuous direct-current voltage output of 0.11 V, which exhibits its promising potential application in the field of wearable devices and the IoTs.