Affiliation of Author(s):航空学院
Journal:Nano Energy
Abstract:Semiconducting Janus transition metal dichalcogenides (TMDs) are attractive for application in nanoscale electricity harvesting devices as their strong out-of-plane piezoelectricity. Here our extensive first-principles calculations reveal that in-plane interlayer sliding of Janus MXY (M = Mo or W, X/Y = S, Se, or Te, and X ≠ Y) bilayers would lead to significant enhancement of vertical piezoelectricity. The tribo-piezoelectric transduction mechanism is elucidated by tribological energy conversion of Janus TMD bilayers overcoming interlayer sliding resistance to reach the A-A stacking states that have the strongest out-of-plane piezoelectricity. Reducing interlayer distances of Janus TMD bilayers increases sliding energy barriers, and accordingly improves vertical charge polarization and inductive voltage generated between the top and bottom surfaces of Janus TMD bilayers. Based on the presented tribo-piezoelectricity, a compression-sliding design strategy is proposed for Janus TMD bilayers to create novel nanogenerators. © 2018 Elsevier Ltd
ISSN No.:2211-2855
Translation or Not:no
Date of Publication:2019-02-01
Co-author:Cai, Haifang,Gao, Huajian,Guo Wanlin
Correspondence Author:Guo Yufeng
Professor
Supervisor of Doctorate Candidates
Gender:Male
Alma Mater:Nanjing University of Aeronautics and Astronautics
Education Level:南京航空航天大学
Degree:Doctoral Degree in Engineering
School/Department:College of Aerospace Engineering
Discipline:航空宇航科学与技术. Solid Mechanics
Business Address:No.29 Yudao street,517 of Building 9, Nanjing
Contact Information:86-025-84890513
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