Fabrication of high-density self-organized quantum dot array and control of photovoltaic conversion mechanism
| Project/Area Number |
26246017
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Crystal engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OKADA YOSHITAKA 東京大学, 先端科学技術研究センター, 教授 (40224034)
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| Research Collaborator |
TAMAKI RYO 東京大学, 先端科学技術研究センター, 助教
SHOJI YASUSHI 東京大学, 先端科学技術研究センター, 特任助教
YOSHIDA KATSUHISA 東京大学, 先端科学技術研究センター, 特任研究員
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2017: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2014: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
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| Keywords | 量子ドット太陽電池 / 中間バンド太陽電池 / 自己組織化量子ドット / ２段階光吸収過程 / 分子線エピタキシー / 量子ドット超格子 / 量子ドット / 2段階光吸収過程 / フーリエ変換光電流分光法 / 結晶成長 / 高効率太陽光発電材料・素子 / 太陽電池 / 半導体物性 / 量子ナノ構造 / 2段階光吸収 / 太陽光発電 / 量子効率 |
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| Outline of Final Research Achievements |
The intermediate band solar cell is one of the most promising candidates for the next generation of photovoltaic cells with a maximum theoretical efficiency of >60% under sunlight concentration, and quantum dot based solar cells gained intense research.
In this work, type-II GaSb/AlGaAs quantum dot solar cells were investigated for application to intermediate band solar cells. Multi-stacked GaSb quantum dots were embedded in the i-region of host GaAs or AlGaAs single-junction solar cells. Fourier transform photocurrent spectroscopy with absolute intensity calibration revealed infrared external quantum efficiency spectra by two-step photon absorption. Thermionic emission of photo-carriers was suppressed efficiently in these device architectures, and significant photocurrent production via two-step photon absorption was confirmed at room temperature operation.
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Report
(5 results)
Research Products
(46 results)
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[Journal Article] Demonstration of the operation principles of intermediate band solar cells at room temperature2016
Author(s)
E. López, A. Datas, I. Ramiro, P.G. Linares, E. Antolin, I. Artacho, A. Marti, A. Luque, Y. Shoji, T. Sogabe, A. Ogura, Y. Okada
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Journal Title
Solar Energy Materials and Solar Cells
Volume: 149
Pages: 15-18
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Intermediate band solar cells: Recent progress and future directions2015
Author(s)
Y. Okada, N. J. Ekins-Daukes, T. Kita, R. Tamaki, M. Yoshida, A. Pusch, O. Hess, C. C. Phillips, D. J. Farrell, K. Yoshida, N. Ahsan, Y. Shoji, T. Sogabe, and J-F. Guillemoles
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Journal Title
Applied Physics Reviews
Volume: 2
Issue: 2
Pages: 021302-021302
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Quantitative Optical Spectroscopy of QDs Intermediate Band Solar Cells2015
Author(s)
P. Rale, B. Behaghel, A. Delamarre, N. Vandamme, D. Ory, S. Collin, L. Lombez, J.F. Guillemoles, R. Tamaki, Y. Shoji, and Y. Okada
Organizer
31st European Photovoltaic Solar Energy Conference and Exhibition (EU-PVSEC)
Place of Presentation
ドイツ・ハンブルグ
Year and Date
2015-09-14
Related Report
Int'l Joint Research
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