Light harvest properties of dye-sensitized solar cells with different spatial configurations of reflecting layer

Dye-sensitized solar cells (DSSCs) were fabricated using an additional porous nanocrystalline titanium oxide reflecting layer in order to improve light harvesting properties. Because of the high reflectance and scattering characters of the nanocrystalline titanium oxide, photocurrent conversion efficiency and short circuit current density of DSSCs were improved. This study reports the relationship between the spatial configuration of the additional reflecting layer and the performance enhancement of DSSCs in order to investigate the optimal condition and the origin of the improved performance because spatial configuration can effect on properties positively or negatively. As the result, we can determine the best spatial configuration of reflecting layer, which have shown photo conversion efficiency enhancement (17.32%).