ALUMINUM PASTE FOR A BACK ELECTRODE OF SOLAR CELL

摘要

Disclosed herein is an aluminum paste for a back electrode of a solar cell, including, based on the total amount thereof: 65 ~ 75 wt% of aluminum powder having an average particle size dis¬ tribution of 0.01 ~ 5 µm; 0.01 ~ 5 wt% of glass frit; and 20 ~ 34.90 wt% of an organic vehicle solution. The aluminum paste is advantageous in that since the contact between aluminum paste and a textured silicon wafer is improved, the bowing of a solar cell can be prevented, and the formation of aluminum balls and/or bumps and the occurrence of yellow discoloration can be minimized during a co-firing process, the values of short circuit current (Isc) and open circuit voltage (Voc) can be greatly increased and the efficiency of a solar cell can be remarkably improved.