2010 Fiscal Year Final Research Report
Photoelectric Conversion Using Plasmonic Nanostructures with Enhanced Electric Fields
| Project Area | Strong Photons-Molecules Coupling Fields for Chemical Reactions |
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| Project/Area Number |
19049012
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
YAMADA Sunao Kyushu University, 工学研究院, 教授 (30136551)
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| Co-Investigator(Kenkyū-buntansha) |
TSUYOSHI Akiyama 滋賀県立大学, 工学部, 准教授 (20304751)
YUTAKA Kuwahara 熊本大学, 大学院・自然科学研究科, 助教 (60347002)
KOUSUKE Sugawa 日本大学, 理工学部, 助手 (40580204)
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| Co-Investigator(Renkei-kenkyūsha) |
HIROAKI Yonemura 九州大学, 大学院・工学研究院, 准教授 (40220769)
TSUYOSHI Akiyama 滋賀県立大学, 工学部, 准教授 (20304751)
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| Project Period (FY) |
2007 – 2010
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| Keywords | 構造・機能材料 / 自己組織化 / 表面・界面物性 / プラズモン / 光エネルギー変換 |
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| Research Abstract |
We have fabricated various types of photoelectric conversion devices consisting of organic dye molecules and metallic nanostructures of gold and silver nanospheres or gold nanorods, by using chemical approaches (self-assembling, electrostatic layer-by-layer method, array formation at liquid-liquid interfaces, and so on). Structural and special population and intensities of plasmonic electric fields of as fabricated photoelectric conversion devices were investigated by using various electron micrographs, absorption, fluorescence, and surface plasmon resonance spectroscopic methods, and have been compared with photocurrent generation properties. Organic/metal nanostructure systems have been especially concentrated in this study. Using constructed spectroscopic systems, we have succeeded in evaluating the effects of plasmonic electric fields on the enhancement of photocurrents. As to photoactive dye molecules, we have compared low-molecular-weight molecules and organic polymers. In the case of low-molecular-weight molecules, about two-orders of magnitude larger photocurrent generation could be achieved by utilizing three-dimensional metal nanostructures. As to organic polymers, we have attained the evaluation of the effects of plasmonic fields on the photocurrent enhancement even in the case of two-electrode photocells. Meanwhile, a mission of novel photoenergy conversion among the project has been launched. In this mission, two kinds of photoelectric conversion systems, organic/metal nanostructure and semiconducting/metal nanostructure systems, have been investigated as promising systems. Collaboration through this mission has realized the creation of high-performance photoelectric conversion systems and application of these systems to the development into photocells.
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