2013 Fiscal Year Final Research Report
Thermal annealing effect of organic solar cells using organofullerene/solvent co-crystals
| Project/Area Number |
24750177
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Functional materials/Devices
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TANAKA HIDEYUKI 東京大学, 理学(系)研究科(研究院), 特任助教 (10585821)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 有機太陽電池 / フラーレン / 溶媒和 / 自己組織化 / 有機半導体 / ナノ構造 |
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| Research Abstract |
We examined a thermal annealing effect of organic solar cells by using organo/solvent co-crystals. Electron mobility of the co-crystal of fullerene was decreased by the phase transition to amorphous mesophase under the heating, and it was then, increased by the thermal crystallization at the high temperature annealing. The changes of the electron mobility, however, did not correlated with the photovoltaic performance. Rather, performance was maximized when the mobility was minimized at the amorphous mesophase. The result suggesting that the molecular level contact at interface between the donor and acceptor become a crucial factor for the solar cells.
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