Hybrid SiO2-TiO2 photoelectrode with different type of layers was investigated in dye-sensitized solar cells (DSSC). Use of a thin layer of nanocrystalline TiO2 would imply reduction in the amount of dye coverage, however, lower amount of dye in the thin films would imply fewer electron generation upon illumination. So, thus, it becomes necessary to include a SiO2-TiO2 layer for increase light harvesting effect such that the lower photon conversion due to thin layer could be compensated. In this paper reports the use of transparent high surface area TiO2 layer and an additional SiO2-TiO2 layer, thus ensuring adequate light harvesting in these devices. The best solar conversion efficiency 6.6% under AM 1.5 was attained with a multi-layer structure using TiO2 layer/SiO2-TiO2 layer/TiO2 layer for the light harvesting and this had resulted to about 44% increase in photocurrent density of dye-sensitized solar cells.
