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.
- TiO₂ thin film;dye-sensitized solar cells;electrochemical impedance spectroscopy;surface modification
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沈阳化工大学材料科学与工程学院沈阳 110142

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Electrode Interface Characteristics of TiO₂ Solar Cells with Surface Modification