PROCESS FOR PREPARING BURIED CONTACT SOLAR CELL

摘要

PURPOSE: A process for preparing buried contact solar cell(BCSC) having low shading loss and electric power loss, thereby having excellent energy conversion efficiency, is provided. CONSTITUTION: The process for preparing buried contact solar cell comprises the steps of texturing the p-type semiconductor substrate(1) to form a pyramid structure on the front and rear surfaces of the substrate(1); diffusing an emitter to the substrate(1) to form p-n bonding; forming an oxide layer(3) on the front surface of the substrate(1); forming grooves on the substrate(1); doping the grooves with n-type impurities; vapor depositing conductive materials on the rear surface of the substrate(1) and then sintering to form back electrode(4); electroless plating with nickel onto the grooves to form nickel plating layer; electroplating with copper on the nickel plating layer to form copper plating layer; and electroless plating with silver onto the copper plating layer to form silver plating layer, thereby forming front electrode(2).