Enhancement of Photoelectric Efficiency in a Dye-Sensitized Solar Cell Using Hollow TiO2 Nanoparticles as an Overlayer

TiO2 hollow nanoparticles (HNPs) and their light Scattering effect which influences on the photoelectric conversion efficiency of a dye-sensitized solar cell (DSSC) were investigated. When only HNPs were employed in DSSC as the anode layer material, the conversion efficiency (e.g., 0.96%) was the lowest, possibly due to scattering loss of incident light. However, DSSC fabricated by using HNPs as a scattering overlayer on the TiO2 nanoparticles (P-25), showed higher conversion efficiency (4.02%) than that without using HNPs (3.36%)