| Project/Area Number |
25870626
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
Energy engineering
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
KOSUGA ATSUKO 大阪府立大学, 21世紀科学研究機構, 講師 (30379143)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 熱電材料 / カルコパイライト / 熱的特性 / 電気的特性 / 熱電特性 |
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| Outline of Final Research Achievements |
The aim of this study is clarification of mechanism of high-thermoelectric properties of chalcopyrite tellurides and suggestion of better thermoelectric materials which are comprised of environmentally-friendly materials. As a results, the thermoelectric properties and stability of copper zinc tin sulfide (Cu2ZnSnS4) in air at 300-720 K are evaluated. Cu2ZnSnS4 is chemically stable in air and exhibited a maximum thermoelectric dimensionless figure of merit of 0.1 at 720 K, making it a promising candidate for the p-type leg of thermoelectric devices that operate in air. However, air annealing of Cu2ZnSnS4 with Pt paste induces macroscopic segregation of a ZnS-rich phase, which increases its electrical resistivity. Because Pt is considered a suitable junction material, a barrier material between Cu2ZnSnS4 and Pt paste is needed to realize reliable thermoelectric devices.
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