2020 Fiscal Year Final Research Report
Demonstration of piezoelectric properties of novel 2D materials toward energy harvesting
| Project/Area Number |
19K21956
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 21:Electrical and electronic engineering and related fields
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Nagashio Kosuke 東京大学, 大学院工学系研究科(工学部), 教授 (20373441)
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| Project Period (FY) |
2019-06-28 – 2021-03-31
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| Keywords | 環境発電 / 圧電・強誘電 / SnS |
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| Outline of Final Research Achievements |
In this study, we focused on piezoelectric SnS,which is one of two-dimensional materials with broken central symmetry. By controlling the supply of raw materials during growth and the desorption of SnS from the crystal surface, we succeeded to grow monolayer SnS with a thickness of 0.8 nm on a mica substrate. Moreover, we constructed a machine to introduce strain and verified the piezoresistive effect from the strain response in the electrical characteristics of SnS. A decrease and an increase in resistance were observed with respect to compression and tension, respectively. The piezoresistive effect was clarly observed.
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| Free Research Field |
半導体デバイス工学
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| Academic Significance and Societal Importance of the Research Achievements |
今回，新規圧電・強誘電材料である単層SnSのPVD成長及びその圧抵抗効果の計測等を行った．これまで物性に関する理論予測しかなく単層成長は報告されていなかった状況において，圧電・強誘電特性を評価できた点は，学術的に意義が高い．社会実装まで大きな隔たりがあるものの，既存の圧電材料では困難であった環境発電によるIoTデバイス動作を達成できる可能性がある本提案は，実現すれば社会へのインパクトは非常に大きい．
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