Effects of multi-layer and TiCl 4 treatment for TiO 2 electro de in dye-sensitized solar cell

Abstract

To investigate the photon-trapping effect and scattering layer effect of TiO 2 multi-layer in dye-sensitized solar cell (DSSC) and the degree of recombination of electrons at the electrode treated TiCl 4, we formed electrodes of different conditions and obtained the most optimal electrode conditions. To estimate characteristics of the cell, IV curve, UV-Vis spectrophotometer, electrochemical impedance spectroscopy (EIS) and incident photon-to-current conversion efficiency (IPCE) were measured. As a result, we confirmed that the multi-layer's efficiency was higher than that of monolayer in the IV curve and the performance of TiCl 4 treated electrode was increased according to decreasing the impedance of EIS. Among several conditions, the efficiency of the cell with scattering layer is higher than that of a layer with the base electrode about 19%. Because the light scattering layer enhances the efficiency of the transmission wavelength and has long electron transfer path. Therefore, the value of the short circuit current increases approximately 10% and IPCE in the maximum peak also increases about 12%.