2015 Fiscal Year Final Research Report
A proposal for next generation solar cells: photon upconversion by quantum well islands and its efficiency improvement
| Project/Area Number |
25289362
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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 |
Energy engineering
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| Research Institution | Toyota Technological Institute |
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Principal Investigator |
Kamiya Itaru 豊田工業大学, 工学(系)研究科(研究院), 教授 (10374018)
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| Research Collaborator |
TEX David
KANEMITSU Yoshihiko
SHIMOMURA Kenichi
TAKABAYASHI Ko
YAMADA Fumihiko
ZHANG Yuwei
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 半導体 / 量子構造 / 電子物性 / 太陽電池 / 結晶成長 |
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| Outline of Final Research Achievements |
Photon upconversion using a novel quantum structure which we call quantum well islands (QWIs) has been investigated. Data supporting our former speculation that Auger process being the dominant mechanism responsible for upconversion have been obtained. Upconverted carriers have also been successfully detected as photocurrents (PCs). In combination with photoluminescence (PL) measurements with multiple beam excitation, the carrier dynamics have been discussed. Further, it has been shown that QWI is not only effective for supplying an intermediate state for IR to visible conversion but also for supplying a stable state, which may help improving upconversion efficiency in various structures.
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| Free Research Field |
応用物理学
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