| Project/Area Number |
26610101
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 熱電効果 / バンド形状 / 物質設計 / 無次元性能指数 / ヴィーデマン・フランツ則 / ゼーベック効果 / バンド構造 |
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| Outline of Final Research Achievements |
(1) We performed a band structure calculation for tau-type molecular crystals, and calculated the Seebeck coefficient. We have succeeded in quantitatively reproducing the experimental results. (2) We performed a band structure calculation for a recently found thermoelectric material SnSe, and found that the ZT value reaches close to 3 when electrons are doped. (3) We investigated in general the relationship between the thermoelectric properties and the band shape. We have found that an ideal pudding mold type band can give rise to a ZT value of 4 when a reasonable value is assumed for the lattice thermal conductivity. (4) We studied the thermoelectric properties of LaOBiS2 and relateted materials, and found that some element substitution can give rise to a strong enhancement of the power factor.
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