2013 Fiscal Year Final Research Report
Creation of novel photon upconverters for realizing the enhancement of solar-energy utilization efficiencies
| Project/Area Number |
23686035
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
MURAKAMI Yoichi 東京工業大学, グローバルエッジ研究院, テニュア・トラック助教 (80526442)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 太陽光エネルギー利用高効率化 / 未利用エネルギー利用 / 光子エネルギー変換 / イオン液体 / 分子間エネルギー移動 / スピン三重項 / 三重項-三重項消滅 / 分子キネティクス |
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| Research Abstract |
When solar energy is converted to electrical power, hydrogen, and hydrocarbons by photovoltaics, photocatalysts, and artificial photosynthetic systems, respectively, photons with energies lower than a system-dependent threshold energy (or wavelengths longer than the threshold wavelength) are unused, which is limiting the solar conversion efficiency. Photon upconversion (UC) makes such presently wasted solar energy utilizable for energy conversion. In this study, ionic liquids have been used as media of the energy-carrying molecules, by which problems of the previous UC studies have been largely resolved. However, for further increase of the UC efficiency, an elucidation of inter-molecular energy transfer was imperative. This study has carried out studies on this point and acquired many knowledge that were previously unknown. By this, an important guideline for the improvement of UC efficiency has been for the first time obtained.
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