Comparison betweenSiO2@TiO2 and TiO2@SiO2 as back-scattererin Dye sensitized Solar Cell

In this work, we compare between two core/shell structure; SiO2 particles with tiO2 shells and TiO2 particleswith SiO2 shells, as back-scatterersfor DSSCs. SiO2@Tio2 and TiO2@SiO2 microspheres structuredhavebeen fabricated byasimpleprocedure. The structure and morphology of samples were investigated by SEM. The diffuse reflectance oflayers were investigated by DRS. SEM images showed that SiO2@Tio2 particles are monodispersed with a diameter of about 400 nm and TiO2@SiO2 particles are also about 400 nm. DRS graphs showed effective reflect for thesestructures. So SiO2@TiO2back- scatterermade 14% increase and TiO2@SiO2back-scatterer made 20% in DSSCs efficiency.

کلیدواژه ها:

Dye sensitized solar cells ، SiO2 ، TiO2 ، core/shell structure ، back-scatterer