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


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          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  μA. 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.

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          Most cited references64

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          Flexible triboelectric generator

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            Piezoelectric nanogenerators based on zinc oxide nanowire arrays.

            We have converted nanoscale mechanical energy into electrical energy by means of piezoelectric zinc oxide nanowire (NW) arrays. The aligned NWs are deflected with a conductive atomic force microscope tip in contact mode. The coupling of piezoelectric and semiconducting properties in zinc oxide creates a strain field and charge separation across the NW as a result of its bending. The rectifying characteristic of the Schottky barrier formed between the metal tip and the NW leads to electrical current generation. The efficiency of the NW-based piezoelectric power generator is estimated to be 17 to 30%. This approach has the potential of converting mechanical, vibrational, and/or hydraulic energy into electricity for powering nanodevices.
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              On a Peculiar Class of Acoustical Figures; and on Certain Forms Assumed by Groups of Particles upon Vibrating Elastic Surfaces

              M. Faraday (1831)

                Author and article information

                Research (Wash D C)
                Research (Wash D C)
                24 January 2021
                : 2021
                1College of Microelectronics, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
                2State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
                3Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
                4State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
                Copyright © 2021 Yanghua Lu et al.

                Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).

                Funded by: Postdoctoral Innovative Personnel Support Program
                Award ID: BX20180013
                Funded by: China Postdoctoral Science Foundation
                Award ID: 2019M660001
                Funded by: Key-Area Research and Development Program of Guangdong Province
                Award ID: 2020B010189001
                Award ID: 2019B010931001
                Funded by: Bureau of Industry and Information Technology of Shenzhen
                Award ID: 201901161512
                Funded by: Beijing Excellent Talents Training Support
                Award ID: 2017000026833ZK11
                Funded by: Beijing Municipal Natural Science Foundation
                Award ID: JQ19004
                Funded by: National Natural Science Foundation of China
                Award ID: 61774135
                Award ID: 51502264
                Award ID: 51202216
                Research Article


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