Y2O3/TiO2 "核-壳"结构在染料敏化太阳电池中的应用

引用本文: 李文欣, 胡林华, 戴松元. Y₂O₃/TiO₂ "核-壳"结构在染料敏化太阳电池中的应用[J]. 物理化学学报, 2011, 27(10): 2367-2372. doi: 10.3866/PKU.WHXB20111011 shu

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

Y₂O₃/TiO₂ "核-壳"结构在染料敏化太阳电池中的应用

基金项目:
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)

摘要: 在纳米TiO₂多孔薄膜表面包覆超薄绝缘体, 形成"核-壳"结构的势垒层, 是目前染料敏化太阳电池(DSC)光阳极改性的研究热点之一. 本文选取氧化钇(Y₂O₃)作为包覆层材料, 采用浸渍法对纳米TiO₂多孔薄膜进行修饰, 研究Y₂O₃包覆处理对TiO₂薄膜微观结构及能带结构的影响; 将浸渍法制备得到的Y₂O₃/TiO₂ "核-壳"结构光阳极应用于DSC中, 研究了包覆层对电子传输复合以及DSC光电转换性能的影响. 结果表明, Y₂O₃包覆处理后, 薄膜的平带电势负移, 且电子复合得到有效抑制, 电子寿命增大, 电池的开路电压明显提高. 研究表明, 适量引入Y₂O₃可以达到改善电池性能的目的.

关键词:

English

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: 04 July 2011
Available Online: 27 September 2011
Fund Project:
国家重点基础研究发展规划项目(973) (2011CBA00700)

国家高技术研究发展计划项目(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

Abstract: 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.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Y₂O₃/TiO₂ "核-壳"结构在染料敏化太阳电池中的应用

English

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

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