物理化学学报 >> 2011, Vol. 27 >> Issue (10): 2367-2372.doi: 10.3866/PKU.WHXB20111011

电化学和新能源 上一篇    下一篇

Y2O3/TiO2 "核-壳"结构在染料敏化太阳电池中的应用

李文欣, 胡林华, 戴松元   

  1. 中国科学院新型薄膜太阳电池重点实验室, 中国科学院等离子体物理研究所, 合肥 230031
  • 收稿日期:2011-07-04 修回日期:2011-08-03 发布日期:2011-09-27
  • 通讯作者: 戴松元 E-mail:sydai@ipp.ac.cn
  • 基金资助:

    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)和中国科学院知识创新工程重要方向项目(KGCX2-YW-326)资助

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

LI Wen-Xin, HU Lin-Hua, DAI Song-Yuan   

  1. Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
  • Received:2011-07-04 Revised:2011-08-03 Published:2011-09-27
  • Contact: DAI Song-Yuan E-mail:sydai@ipp.ac.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2011CBA00700), National High Technology Research and Development Program of China (863) (2009AA050603, 2011AA050527) and Funds of the Chinese Academy of Sciences for Key Topics in Innovation Engineering (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: 氧化钇, 电子复合, 平带电势, 染料敏化太阳电池

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: Yttrium oxide, Electron recombination, Flat-band potential, Dye sensitized solar cell

MSC2000: 

  • O646