LOW-TEMPERATURE CONDUCTIVE SILVER PASTE FOR HIT SOLAR CELL AND PREPARATION METHOD THEREFOR

摘要

Disclosed are a low-temperature conductive silver paste for an HIT solar cell and a preparation method therefor. The low-temperature conductive silver paste for a HIT solar cell of the present invention is prepared from the following components in parts by mass: 27-46 parts of a flaked silver powder; 46-65 parts of a spherical silver powder; 1.5-3.5 parts of a thermosetting resin; 0.5-1.5 parts of a reactive diluent; 2-4 parts of an organic solvent; 0.65-0.75 parts of a curing agent; 0.05-0.15 parts of an imidazole curing accelerator; 0.35-0.45 parts of a dispersant; 0.01-0.6 parts of a thixotropic agent; 0-2.4 parts of an epoxy toughening agent; and 0.5-1.5 parts of an ionomer, for 100 parts in total. The low-temperature conductive silver paste of the present invention prepared using the formula can form a bond with a substrate, and has good wettability on the substrate, thus increasing the fill factor of a solar cell, thereby improving the photoelectric conversion efficiency of the solar cell.