Characteristics of Index Equivalent Electrical Circuit Elements in Impedance Spectroscopy of Dye-sensitized Solar Cells

Equivalent circuit constructed by equivalent elements is an important way that used to investigate the impedance spectroscopy and analysis internal dynamics of the multi-interface reaction in dye-sensitized solar cells(DSC). A multi-interface equivalent circuit is proposed based on the characteristics of multi-interface between two phases inside DSC. Moreover, the Zview software have been used to simulate the nature and frequency response characteristics of the index in equivalent circuit element, like the constant phase elements(CPE), the transmission line elements(DX) and the Nernst diffusion impedance elements(W_S) which is directly or indirectly including CPE, as well as effect on entire impedance spectroscopy and kinetic processes of DSC in the range of wide frequency. The results show that the change of the elements index values not only influence the performance of equivalent elements but also produce different degrees effect on the charge transport and transfer dynamics in different frequency regions of impedance spectroscopy.