Citation: LI Wen-Xin, HU Lin-Hua, DAI Song-Yuan. Core-Shell Structure of Y₂O₃/TiO₂ for Use in Dye Sensitized Solar Cells[J]. Acta Physico-Chimica Sinica, ;2011, 27(10): 2367-2372. doi: 10.3866/PKU.WHXB20111011 shu

Core-Shell Structure of Y₂O₃/TiO₂ for Use in Dye Sensitized Solar Cells

1.
Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China

Received Date: 4 July 2011
Available Online: 17 August 2011
Fund Project: 国家重点基础研究发展规划项目(973) (2011CBA00700) (973) (2011CBA00700) 国家高技术研究发展计划项目(863) (2009AA050603, 2011AA050527) (863) (2009AA050603, 2011AA050527)中国科学院知识创新工程重要方向项目(KGCX2-YW-326)资助 (KGCX2-YW-326)

The deposition of a thin insulating layer around the TiO₂ film to form a"core-shell"structure is a promising approach for the modification of electrodes. This is currently one of the focuses in the dye sensitized solar cell (DSC), which has received much attention for development of low-cost and simple assembly technology. In this paper, yttrium oxide (Y₂O₃), as a shell material, was coated onto the TiO₂ film by a dipping method. The Y₂O₃/TiO₂"core-shell"electrode was then used to fabricate the DSC. The composition and structure of the Y₂O₃/TiO₂ film were measured. The effects of the Y₂O₃ layer on the flat-band potential, electron recombination, and the characteristics of DSC were investigated in detail. Results suggest that the flat-band potential of the film shifted negatively when TiO₂ was coated with Y₂O₃ while electron recombination loss at the TiO₂/electrolyte/dye interface was effectively reduced. As a result, the"core-shell"electrode provided a longer electron lifetime value compared with the uncoated TiO₂ electrode and ultimately the open-circuit voltage increased dramatically. Studies show that the cell performance can be improved by the introduction of a proper amount of Y₂O₃ to the DSC.
- Yttrium oxide,
- Electron recombination,
- Flat-band potential,
- Dye sensitized solar cell
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沈阳化工大学材料科学与工程学院沈阳 110142

Core-Shell Structure of Y2O3/TiO2 for Use in Dye Sensitized Solar Cells

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通讯作者: 陈斌, bchen63@163.com

Core-Shell Structure of Y₂O₃/TiO₂ for Use in Dye Sensitized Solar Cells