Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (11): 2339-2344.doi: 10.3866/PKU.WHXB201309031

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Facile Synthesis of Cu2SnSe3 as Counter Electrodes for Dye-Sensitized Solar Cells

ZHU Lei1,2, QIANG Ying-Huai1, ZHAO Yu-Long1, GU Xiu-Quan1, SONG Duan-Ming1, SONG Chang-Bin1   

  1. 1 School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;
    2 School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China
  • Received:2013-05-15 Revised:2013-09-02 Published:2013-10-30
  • Contact: QIANG Ying-Huai
  • Supported by:

    The project was supported by the Fundamental Research Funds for the Central Universities, China (2592012184) and Fund of the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.


Cu2SnSe3 (CTSe) nanoparticles with diameters of 150-250 nm were synthesized by a facile solvothermal method. The nanoparticles drop-casted onto fluorine dope tin oxide (FTO) substrate were used as counter electrode in dye-sensitized solar cells (DSSCs). The morphology, structure and composition of the CTSe nanoparticles were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and energy dispersive X-ray spectroscopy (EDS). The results indicated the formation of the nanoparticles with a single crystal phase and approximately stoichiometric composition. DSSCs fabricated with the CTSe-based counter electrodes exhibited a power conversion efficiency of 7.75%, which is similar to that of Ptbased devices (7.21%). The current-voltage curves of the DSSCs demonstrated that the thickness of the CTSe layer strongly influenced the photocurrent density and fill factor as a result of changes in the number of electrocatalytic sites and the resistance of the layers. Electrochemical impedance spectroscopy (EIS) measurements were performed and the results indicated that CTSe exhibited Pt-like electrocatalytic activity for the reduction of I3- to I- in DSSCs. This work presents a new approach for expanding the possibilities for developing low-cost DSSCs that do not require expensive and rare Pt counter electrodes.

Key words: Cu2SnSe3, Nanoparticle, Solvothermal, Counter electrode, Dye-sensitized solar cell


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