LAUSR

In this paper, Fe₃O₄-titanium dioxide (TiO₂) composited photoelectrode was prepared by spin coating method. The effects of incorporating Fe₃O₄ into the TiO₂ photoelectrode of dye-sensitized solar cell (DSSC) were investigated in detail by atomic force microscope, solar simulator, X-ray diffraction, UV-visible spectroscopy, and electrochemical impedance spectroscopy. Compared with the photovoltaic conversion efficiency of 2.35% of DSSC based on TiO₂ pure photoelectrode, the photovoltaic conversion efficiency of 3.54% was obtained. The experimental results show that the Fe₃O₄ acted as a catalyst to provide another electron pathway for DSSC, which could lower the condition of electron recombination. Moreover, it could be found from Nyquist plot that the resistance at the interface between electrolyte and TiO₂ film increased for DSSC after incorporating Fe₃O₄ into the TiO₂ photoelectrode, which indicated that the condition of electron recombination was restrained.