2020 Fiscal Year Research-status Report
Designing high-performance thermoelectrics in low-dimensional materials
| Project/Area Number |
20K15178
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| Research Institution | Tohoku University |
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Principal Investigator |
NGUYEN TUANHUNG 東北大学, 学際科学フロンティア研究所, 助教 (10844425)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | Thermoelectricity / DFT calculations / 1D materials / 2D materials |
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| Outline of Annual Research Achievements |
In this project, we study thermoelectricity, which can directly convert waste heat to electricity and provides an ideal supply for IoT sensors. We reported on the origin of the quantum effects to improve the thermoelectricity of low‐dimensional materials. The power factor enhances when the confinement length (the diameter of 1D materials or the thickness of 2D materials) is smaller than the thermal de Broglie wavelength, which is a crucial parameter to enhance the thermoelectricity. Besides, related energy problems of the two-dimensional materials, such as electromechanical and optical properties, are also investigated in this project.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Our progress is going on as planned, in which we have focused on the mechanism to enhance the thermoelectric power factor.
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| Strategy for Future Research Activity |
Our next plan is to study the thermoelectric properties of topology materials. In particular, we will focus on the semimetal because the recent development of semimetal shows new hope for thermoelectricity, originating from the topological states.
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| Causes of Carryover |
In this fiscal year, some international conferences have been canceled under the influence of Covid-19. Therefore, the travel expenses did not used. The incurring amount 695,984円 in the next fiscal year will be used to buy the workstation for calculations.
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