2022 Fiscal Year Final Research Report
Development of New Peltier Device Based on the Off-Diagonal Thermoelectric Effect
| Project/Area Number |
20K05298
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 29010:Applied physical properties-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 熱電変換 / ペルチェ冷却 / 非対角熱電効果 / 傾斜積層構造 |
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| Outline of Final Research Achievements |
In this study, we aimed to develop new Peltier cooling device by fabricating a tilted multilayer structure consisting of one type of thermoelectric (TE) material and one metal based on the off-diagonal TE effect. Because a conventional π-type Peltier cooling device have the problem of requiring p-type and n-type TE materials, which made of same materials, with equal performance. We have successfully fabricated the tilted multilayer structure consisting of CrSi2 TE material and Nb. The results of the cooling performance study confirmed that the temperature difference was generated in the direction perpendicular to the direction of current flow, which means that new Peltier cooling device based on the off-diagonal TE effect was fabricated using only one type of TE material.
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| Free Research Field |
熱電変換
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| Academic Significance and Societal Importance of the Research Achievements |
クロムシリサイド（CrSi2）熱電材料を基とする傾斜積層構造を有する素子を作製し、電流を流すと、直交する方向に温度差をつけることに成功した。これは非対角熱電効果によるペルチェ冷却そのものである。つまり、1種類の熱電材料のみでペルチェ冷却素子が作製できたということは、従来のπ型ペルチェ冷却素子における同材料から成る性能が等しいp型とn型の熱電材料が必要ないという材料科学的制約から解放されたことを意味し、大きな意義がある。今後、さらなる高性能化により従来のπ型ペルチェ冷却素子を置き換えて広く応用されることが期待される。
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