2012 Fiscal Year Final Research Report
Study of energy loss mechanisms in organic thin film solar cells by using quantum beam based analytical techniques
| Project/Area Number |
23760276
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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 |
Electronic materials/Electric materials
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 太陽電池 / 有機/金属界面 / ドーピング / 量子ビーム計測 |
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| Research Abstract |
In this research, we have investigated
(1) electronic properties of electrode buffer layers by means of ultraviolet photoelectron spectroscopy
and (2) the charge transfer speed at molecule/electrode interfaces by means of photoelectron spectroscopy and core-hole clock spectroscopy.
It was found that electrondoping from metal to molecule results in effective electrode contact; that is, the high speed charge transfer of less than 10 fs happens at electrode interfaces. Moreover, it became clear that the electrondoping affected energy level alignment of two or more organic layers. Thus, control of electron doping at organic/metal interface is indispensable to selection of the optimal device structure, and it became clear to become a key to highly efficient OSCs.
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