2011 Fiscal Year Final Research Report
Minority carrier dynamics in solar cell materials investigated by photo-assisted KFM
| Project/Area Number |
21360143
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
OHSHITA Yoshio 豊田工業大学, 大学院・工学研究科, 教授 (10329849)
MINEMOTO Takashi 立命館大学, 理工学部, 准教授 (80373091)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ケルビンプローブフォース顕微鏡 / 太陽電池材料 / 少数キャリア / 再結合プロセス / AFM 光熱分光計測法 / 非発光再結合 |
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| Research Abstract |
We have applied the photo-assisted KFM and the AFM photo-thermal spectroscopy, which we have originally developed, as well as the scanning tunneling spectroscopy on multi- and micro-crystalline solar cell materials in order to investigate their various properties very locally. As a result, we successfully found some specific features of the band profile around the grain boundary, the minority carrier dynamics, such as diffusion ength, lifetime and mobility, with their spatial distribution, and the recombination process of photo-excited carriers.
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