Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (10): 2745-2751.doi: 10.3866/PKU.WHXB20100948

• PHOTOCHEMISTRY AND SPECTROSCOPY • Previous Articles     Next Articles

Enhancing the Photovoltaic Performance of Dye Sensitized Solar Cells with the TiO2 Sol Infiltrated Nanocrystalline Electrode

QIAN Di-Feng1, ZHANG Qing-Hong1, * WAN Jun2, LI Yao-Gang1, WANG Hong-Zhi1   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620,P. R. China;
    2. Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education,Donghua University, Shanghai 201620, P. R. China
  • Received:2010-04-07 Revised:2010-06-03 Published:2010-09-27
  • Contact: ZHANG Qing-Hong
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50772127), Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (708039), Fundamental Research Funds for the Central Universities, China (10D10607).


Transparent anatase titanium dioxide sol was prepared by the hydrothermal treatment of the home-made water soluble peroxotitanium acid (PTA). The nanorod-like TiO2 nanocrystals witha mean diameter of less than7 nm were obtained in the absence of organic compounds. In order to eliminate the large pores derived from eletrode sintering and improve the connectivity among particles in the porous TiO2 electrode, the as-prepared TiO2 sol was infiltrated to the porous TiO2 photoanode for dye sensitized solar cells (DSSCs). As a result, small nanocrystals of titanium dioxide attached to the surface of porous titanium dioxide as well as filled the large pores produced by photoanode sintering. The efficient electron transport networks were formed inside the porous titanium dioxide, which was confirmed by scanning electron microscope (SEM) and optical profilometry. The modified TiO2 film as the anodic electrode was used for the DSSCs and assembled into solar cells. Consequently, the overall energy conversion efficiency of the DSSCs was significantly enhanced by 64% after the low-concentration TiO2 sol infiltration.

Key words: Sol, Infiltration, Electrode interface, Titania, Dye sensitized solar cell


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