Low silver content efficient back passivation solar cell back silver paste

The invention discloses a low silver content efficient back passivation solar cell back silver paste which is composed of mixed conductive silver powder, glass powder, an organic carrier and an additive, wherein the mixed conductive silver powder is formed by mixing nano silver powder and dendritic micron silver powder. The back silver paste is specifically designed for a back passivation cell, and has the advantages of high efficiency, low silver content, wide sintering window and so on. 本发明公开种低银含量高效背钝化太阳能电池背银浆料，它是由纳米银粉和树枝状微米银粉混合得到的混合导电银粉，玻璃粉，有机载体，添加物组成。此背银浆料专门为背钝化电池设计，具有效率高，银含量低，烧结窗口宽等优点。