Patent ID: 11833584

Abstract:
Based on 100 wt % of the alloy aluminum paste, the alloy aluminum paste includes the following components in percentages by weight: 35-56.5% of an aluminum-silicon alloy powder, 17.5-37.5% of an aluminum powder, 1-2% of a lead-free glass powder, 15-20% of an organic solvent, 3-5% of ethyl cellulose, 0.05-0.1% of a thixotropic agent and 0.5-1.5% of a dispersant. The alloy paste can be applied to a PERC solar cell having a passivation coating opening consisting of 0.5-1% of the area of the solar cell. When the alloy aluminum paste is applied to a PERC solar cell having a low opening rate, particularly a rear electrode having a passivation coating opening consisting of 0.5-1% of the area of the solar cell.