2011 Fiscal Year Final Research Report
Construction of highly crystallized organic/inorganic nanostructures and development as transparent conducting films for photovoltaics
| Project/Area Number |
21605007
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Element strategy
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| Research Institution | Kyoto University |
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Principal Investigator |
SAGAWA Takashi 京都大学, エネルギー理工学研究所, 准教授 (20225832)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIKAWA Susumu 京都大学, エネルギー理工学研究所, 非常勤研究員 (60324703)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 太陽電池 / 高効率太陽光発電材料・素子 / ナノ材料 / 超薄膜 / 有機分子デバイス / インジウム / 酸化亜鉛 / 酸化チタン |
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| Research Abstract |
Materials design and optimization of novel transparent conducting film for construction of ITO-free and highly efficient photovoltaic cells have been performed. Preparation of inorganic transparent conducting film made of Li-doped zinc oxide(ZnO) nanorod arrays, single molecular fixation of low-molecular organic dyes on the surface of the ZnO, and assembly and evaluation of hybrid organic photovoltaics in the combination with conducting polymer of poly(3-hexylthiophene)(P3HT) have been investigated. It was confirmed that the Li-doping resulted 1. 5 times improvement of power conversion efficiency(PCE) through the enhancement of the current density and the open circuit voltage. It was also found that introduction of the highly oriented single molecular layer brought doubled open circuit voltage and introduction of the dye with large molecular absorption coefficient in the near infrared region caused 4 times increment of the current density. Not only ZnO, but one-dimensional nanoassemblies composed of porphyrin/fullerene and P3HT or titanium oxide have also been designed and succeeded to form highly efficient carrier pass as compared with that of the dispersed state.
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