Development of thermoelectric mateterial using van der Waals epitaxy

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18889
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 29:Applied condensed matter physics and related fields
• Research Institution: Osaka University
• Principal Investigator: Shiogai Junichi 大阪大学, 大学院理学研究科, 准教授 (30734066)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: 層状化合物

Outline of Final Research Achievements

van der Waals epitaxy is an ideal technique for growing two dimensional (2D) materials on arbitral substances and thus, for making heterostructure composed of different 2D materials. By designing proper atomic arrangement, various physical properties and functionalities are expected to emerge. In this study, we fabricated single crystalline thin film of 2D materials for investigating the thermoelectric properties in thin films forms. Our findings will open a new material platform for novel thermoelectric devices using heterostructure composed of exotic 2D materials.

Free Research Field

薄膜物性

Academic Significance and Societal Importance of the Research Achievements

本研究では、2次元層状化合物がもつ異方的な電気伝導性や熱伝導性に着目し、これらの物質群を使った積層構造における熱電機能を開拓することを目指して、薄膜形状の試料において熱電特性を評価した。2次元的な結晶構造を持った新物質薄膜の熱電材料としての知見を得ることができ、今後これらの物質群の積層構造に展開していくことで、更なる機能の開拓が期待できると考えている。