Front silver-aluminum paste for N-type TOPCon solar cell and preparation method of front silver-aluminum paste

The invention discloses front silver-aluminum paste for an N-type TOPCon solar cell and a preparation method of the front silver-aluminum paste. The front silver-aluminum paste is prepared from the following raw materials in parts by weight: 70 to 80 weight percent of micron silver powder, 3 to 15 weight percent of nano silver powder, 3 to 7 weight percent of glass powder, 6 to 10 weight percent of organic carrier, 0.5 to 5 weight percent of aluminum powder and 0.01 to 0.5 weight percent of reinforcing agent. The slurry is good in dispersion uniformity and low in sintering temperature, and the electrical property can be effectively improved. 本发明公开了一种用于N型TOPCon太阳能电池的正面银铝浆及其制备方法，所述正面银铝浆由以下重量份的原料组成：微米级银粉70-80wt％、纳米级银粉3-15wt％、玻璃粉3-7wt％、有机载体6-10wt％、铝粉0.5-5wt％及增强剂0.01-0.5wt％。本发明的浆料分散均匀性好，烧结温度低，可有效提高电性能。