| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2013: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2012: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2011: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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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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