Solar back field aluminum slurry applied to double-sided PERC battery process and preparation method thereof

The invention discloses solar back field aluminum slurry applied to a double-sided PERC battery process. The solar back field aluminum slurry includes the following raw materials by mass percentage: 18.5% of organic binder, 2% of inorganic binder, 77% of aluminum powder, 1% of leveling defoamer, 0.5% of anti-sedimentation agent, 0.5% of wetting dispersant and 0.5% of aluminum-silicon alloy powder.The organic binder in the slurry plays a role of dispersing powder and adjusting printability in the slurry, so that the slurry has good shaping and aspect ratio after fine screen printing, the shading area on the back of the battery is reduced, and the back efficiency is improved. 本发明公开了一种应用于双面PERC电池工艺的太阳能背场铝浆，所述太阳能背场铝浆所含原料及各原料的质量百分比为：有机粘合剂18.5％，无机粘合剂2％，铝粉77％，流平消泡剂1％，防沉剂0.5％，润湿分散剂0.5％，铝硅合金粉0.5％。本发明浆料中的有机粘合剂在浆料中起分散粉体和调整印刷性的作用，使浆料经过网版细栅印刷后具有良好的塑形和高宽比，减少电池背面的遮光面积，提高背面效率。