Glass powder for main gate electrode silver paste of TOPCon battery as well as preparation method and application of glass powder

The invention relates to glass powder for crystalline silicon solar TOPCon battery main gate electrode silver paste, which is characterized by comprising main glass powder and auxiliary glass powder, the main glass powder is Pb-Si-Ti-Zn oxide, the auxiliary glass powder is Bi-Si-Mn-Cu oxide, and the main glass powder accounts for 60-90 wt%; the particle size D50 of the main glass powder and the auxiliary glass powder is smaller than or equal to 4 micrometers. After the main glass powder and the auxiliary glass powder are matched, the main grid silver paste is not sensitive to the change of the sintering temperature, so that the main grid silver paste has a wider sintering window, and the use of main grid electrodes on the front surface and the back surface of a crystalline silicon solar TOPCon battery can be met at the same time. 本发明涉及一种晶硅太阳能TOPCon电池主栅电极银浆料用玻璃粉，其特征在于，包含主玻璃粉和辅助玻璃粉，所述主玻璃粉为Pb-Si-Ti-Zn氧化物，所述辅助玻璃粉为Bi-Si-Mn-Cu氧化物，主玻璃粉占60-90wt％；所述主玻璃粉、辅助玻璃粉粒径D50均≤4μm。本发明主玻璃粉和辅助玻璃粉二者配合后，对烧结温度的变化并不敏感，使得主栅银浆料具有较宽的烧结窗口，