| Project/Area Number |
17K18971
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials engineering and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
Hayashi Kei 東北大学, 工学研究科, 准教授 (70360625)
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| Research Collaborator |
ISHII kentaro
KAWASAKI chihiro
HONDA ryosuke
YANG runchen
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| Project Period (FY) |
2017-06-30 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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| Keywords | 太陽電池 |
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| Outline of Final Research Achievements |
We measured optical bandgap and carrier density of Mn1-xFexSig~1.73. Mn1-xFexSig~1.73 thin films were fabricated by using a pulsed laser deposition method. The optical bandgap of Mn1-xFexSig~1.73 thin films was approximately 0.8 eV, which was in the near-infrared (NIR) energy range. The carrier density of a Mn1-xFexSig~1.73 bulk sample (x = 0.28) was approximately 1×10{17} cm-3, which was enough to absorb NIR light up to 90%. To fabricate p-n junction of Mn1-xFexSig~1.73, we attempted to prepare a Mn1-xFexSig~1.73 single crystal that can be used as a substrate, by means of a melt-grown method. Mn1-xFexSig~1.73 single crystals were successfully obtained in the range of x < 0.2. Using the p-type Mn1-xFexSig~1.73 single crystal (x = 0.15), we could grow n-type Mn1-xFexSig~1.73 thin films.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、マンガンシリサイド(Mn1-xFexSiγ~1.73)薄膜を用いて、近赤外光利用太陽電池を開発できることが明らかになった。現在普及している太陽電池は近赤外光をエネルギー源として用いておらず、太陽光エネルギーから電気エネルギーに変換するエネルギー変換効率は約20%である。現状の薄膜太陽電池とp型、n型マンガンシリサイド(Mn1-xFexSiγ~1.73)の薄膜太陽電池を組み合わせれば、エネルギー変換効率を約30%まで向上できると予想される。
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