In this study, the silver gird was made by printing method with silver paste on the ITO glass. The mesoporous TiO2 film was grown on ITO glass by spin coater via layer-by-layer deposition. The substrates of counter electrode were sandblasted stainless steel and ITO glass. The counter electrode was made by plating Pt on the stainless steel and ITO glass respectively. The influence of silver grid on conversion efficiency was discussed. The silver grid of the solar cell reacted with the iodine of the electrolyte formed AgI. The AgI leads to short circuit in the solar cell. In addition, the sandblasted stainless steel increase reflectivity to explore the impact of the conversion efficiency. The thickness of Stainless steel is 1 mm, so most of the photoelectrons were absorbed by stainless steel, therefore reduce the conversion efficiency.