Development of high-efficiency silicon-based thermoelectric materials by modulation doping and nanostructuring
| Project/Area Number |
25289220
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Osaka University |
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Principal Investigator |
Kurosaki Ken 大阪大学, 工学(系)研究科(研究院), 准教授 (90304021)
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| Co-Investigator(Kenkyū-buntansha) |
石丸 学 九州工業大学, 工学(系)研究科(研究院), 教授 (00264086)
内田 紀行 国立研究開発法人産業技術総合研究所, その他部局等, 研究員 (60400636)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Keywords | 熱電変換 |
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| Outline of Final Research Achievements |
Si has many advantages, such as non-toxic, abundant, stable, established process for device manufacturing. Although Si exhibits excellent power factor, its lattice thermal conductivity is exceptionally high, which results in the low ZT. However, improvement of the ZT can be achieved by controlling the structure of Si in nanoscale to reduce the lattice thermal conductivity significantly. Further, the power factor can be enhanced by modulation doping. In the present study, we studied the effect of metal silicides as the nanoscale precipitates on the thermoelectric properties of Si. Nanocomposites composed of silicon and various metal silicides were synthesized by a melt spinning method. The size and the distribution of the metal silicides were controlled by changing mainly the cooling rate in the melt spinning process. The metal silicides reduced the lattice thermal conductivity of Si with keeping a high power factor, leading to the improvement of ZT.
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Report
(5 results)
Research Products
(61 results)
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[Journal Article] Local structure determination of substitutional elements in Ca3Co4-xMxO9 (M = Fe, Cr, Ga) using X-ray absorption spectroscopy2014
Author(s)
Supree Pinitsoontorn, Natkrita Prasoetsopha, Pornjuk Srepusharawoot, Atipong Bootchanont, Pinit Kidkhunthod, Teerasak Kamwanna, Vittaya Amornkitbamrung, Ken Kurosaki, and Shinsuke Yamanaka
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Journal Title
Phys. Status Solidi A
Volume: 211
Issue: 8
Pages: 1732-1739
DOI
Related Report
Peer Reviewed
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