2016 Fiscal Year Final Research Report
Fabrication of copper-indium sulfide colloids prepared in water and their applications to the TiO2 based quantum dot-senitized solar cells
| Project/Area Number |
26420730
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 量子ドット型太陽電池 / 無機色素光増感 / CIS-TiO2 / マイクロ波照射 / CISコロイド / 太陽光エネルギー変換効率 |
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| Outline of Final Research Achievements |
The copper-indium-sulfide (CIS) colloids with thioglycolic acid (TGA) were prepared in “green” water media. And, subsequently the CIS colloidal solutions were treated with microwave (MW)-irradiation at different temperatures. Then, the preferable solar cell employing CIS colloids in In/Cu ratio of 2 treated at 160℃ showed high photo-conversion efficiency (PCE) yielding with 6.12% (short-circuit current: 14.0 mA/cm2, open-circuit voltage: 0.91 V and fill factor: 48.0%). To our best knowledge, this value is the highest among the solar cells employing CIS colloids prepared in water media. It was also confirmed that the MW-irradiation improved the light absorption of the CIS colloids as well as induced photo-electrochemical cathodic shift of the Fermi levels for the CIS-TiO2 photoelectrode due to the reduction of defective sites involved in the CIS colloids.
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| Free Research Field |
光電気化学
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