| Title | Direct Current Electricity Generation from Dynamic Polarized Water-Semiconductor Interface |
| Authors | Yan, Yanfei Zhou, Xu Feng, Sirui Lu, Yanghua Qian, Jianhao Zhang, Panpan Yu, Xutao Zheng, Yujie Wang, Fengchao Liu, Kaihui Lin, Shisheng |
| Affiliation | Zhejiang Univ, Coll Microelect, Coll Informat Sci & Elect Engn, Hangzhou 310027, Peoples R China Peking Univ, State Key Lab Mesoscop Phys, Collaborat Innovat Ctr Quantum Matter, Sch Phys, Beijing 100871, Peoples R China Peking Univ, Frontiers Sci Ctr Nanooptoelect, Collaborat Innovat Ctr Quantum Matter, Sch Phys, Beijing 100871, Peoples R China South China Normal Univ, Sch Phys & Telecommun Engn, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Peoples R China Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China |
| Keywords | ENERGY-CONVERSION BASIS-SETS ALGORITHM |
| Issue Date | 8-Jul-2021 |
| Publisher | JOURNAL OF PHYSICAL CHEMISTRY C |
| Abstract | Interpreting the nature of water molecules and generating electricity from water have been important topics both in science and in society. Recently, there is a rising interest for converting the kinetic energy of a water droplet into electricity, especially direct current (DC) electricity, which can directly power electronic sensors and chips. However, the existing electricity generation techniques are dependent on the moving direction of water, which prevents the output of due DC electricity but generates undesired alternating current electricity. Here, we report DC electricity generation from the dynamic polarized water-semiconductor interface by moving a water droplet in an arbitrary direction within a sandwiched graphene-water-semiconductor structure. The direction-independent DC electricity generation is based on a nontrivial mechanism, in which the water molecules experience polarization and depolarization processes, resulting in electricity output at the water-semiconductor interface during the motion of the water droplet. The open-circuit voltage is tunable by the Fermi level difference between two plates that contain the water droplets, where graphene-water-silicon and aluminum-water-silicon show DC voltages of similar to 0.3 and similar to 1.0 V, respectively. Our results reveal the phenomenon at the water-semiconductor interface and provide a new route to generate DC electricity by water for potential sustainable, encapsulated self-powered devices. |
| URI | http://hdl.handle.net/20.500.11897/618997 |
| ISSN | 1932-7447 |
| DOI | 10.1021/acs.jpcc.1c02078 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
