One of the methods to enhance the performance of Dye-Sensitized Solar Cell (DSSC) is by adding SiO2 nanoparticles and Au nanoparticles. Au is known to be able to increase light harvesting while silica acts as scatterer and back recombination inhibitor. Gold nanoparticles should be fabricated in core-shell nanostructure to prevent corrosion, recombination and back reaction of excited electron because of direct contact between metal nanoparticles and liquid electrolyte. In this study, the core-shell characteristics of Au@TiO2@SiO2 and their effects on DSSC performance were investigated. The fractions of SiO2 extracted from Sidoarjo mud to Au and TiO2 were varied. The result revealed that the addition of SiO2 above a certain level leads to agglomeration and uneven distribution of core-shell. Only for 90 ml SiO2 addition can form intended core-shell nanoparticles. Compared to DSSC using basic photoanode TiO2, the core-shells have increased the efficiency of 92.9%. This enhancement was mainly because of the scattering effect of SiO2 while the presence of Au is too small to promote the localized surface resonance.