2013 Fiscal Year Final Research Report
Miniband formation in quantum dot amorphous and its application to photovoltaic devices
| Project/Area Number |
23360287
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Osaka University |
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Principal Investigator |
OMATA Takahisa 大阪大学, 工学(系)研究科(研究院), 准教授 (80267640)
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| Co-Investigator(Kenkyū-buntansha) |
KITA Masao 富山高等専門学校, 機械システム工学科, 准教授 (00413758)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | ナノ材料 / 量子ドット / 高効率太陽光発電材料・素子 / 先端機能デバイス |
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| Research Abstract |
We focused on to develop quantum dot (QD) solar cells that show extremely high conversion efficiency. For this purpose, we investigated synthesis method of colloidal InAs QDs; the InAs QDs show lower threshold energy for multiple exciton generation than PbSe QDs that are currently used in QD solar cell investigations. We focused on the triphenyl arsine that is comparatively safe and easy to handle rather than the conventional tris(trimethylsilyl)arsine as an arsenic source. We successfully developed a new synthesis route to colloidal InAs QDs. Further, we investigated miniband formation in quantum dot amorphous, of which the density of QD is significant larger than that in conventional self-assembled QD films but no periodicity is exist in the QD arrangement. Miniband formation was clearly observed for the PbSe quantum dots, but it was not observed for the CdSe and PbS QDs. This indicates that the miniband formation is significantly dependent on the exciton Bohr radius.
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[Presentation]2011
Author(s)
小俣孝久
Organizer
資源・素材2011(堺)
Place of Presentation
大阪府立大学(大阪府)
Year and Date
2011-09-28
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