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Citation: LI Yan, ZHUANG Quan-Chao, WANG Hong-Tao, WU Wen-Wei, ZHAO Yu-Long, QIANG Ying-Huai. Electrode Interface Characteristics of TiO2 Solar Cells with Surface Modification[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(4): 763-769. doi: 10.11862/CJIC.2014.052 shu

Electrode Interface Characteristics of TiO2 Solar Cells with Surface Modification

  • 1.

    1 School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;

  • Corresponding author: ZHUANG Quan-Chao, 
  • Received Date: 8 July 2013
    Available Online: 25 September 2013

    Fund Project: 学科创新能力提升基金(No.2013XK04)资助项目。 (No.2013XK04)

  • TiO2 nanomaterial with typital anatase was prepared by hydrothermal method. Asurface modification method was carried out by over layer coating on the surface of TiO2 thin film using Cr(NO3)3. The surface phase and morphology of electrodes were characterized by X ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that a layer of chromium oxide with larger particles was coated on TiO2 thin film and the electrode remains homogeneous porous structure. The current-voltage (I-V) curves revealed that short circuit current and photoelectric transfer efficiency of the optimal modified electrode enhanced by 31.1% and 40.4% respectively more than before. Interface characteristics of cells were discussed using EIS. Seen from the results, the resistance of TiO2/dye/electrolyte interface of modified electrode was much larger than before at the same bias. It is indicated that chromium oxide coating on TiO2 thin film suppressed the charge recombination reactions and improved the performance of DSSCs.
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