Crystalline Silicon Solar Cell Paste With Glass Powder Composition And The Performance Of The Research

Ultrafine powder materials is a critical foundation material for preparation of various types of electronic paste, the world’s leading supplier of electronic pulp products, DuPont and Heraeus perfect ultra-fine metal powder and various series of ultra-fine glass powder R&D and production lines, to ensure the continuous development of its electronic paste, which shows its importance. Applied to crystalline silicon solar cell the electrode paste for electrode metal is no exception, excellent powder to make a paste. This article required on the solar cell electronic paste one of the powder material. Glass powder was the object of research and development, to explore the positive paste for crystalline silicon solar cells with glass powder, glass powder system requirements of the back of Silver with glass powder and aluminum paste on the back of the glass powder, and successfully applied to crystalline silicon solarbattery electrode paste production. The glass powder of the development process using water quenched after the high temperature molten liquid glass the coarse glass powder, and then milling-sifting to get to meet the requirements of the glass powder. The whole process is discussed in the glass composition on the glass powder used in the pulp after the end-product performance, and on this basis to optimize the glass powder formulations. Mechanism of the positive paste penetrate the antireflection coating. The back of the aluminum paste the thermal expansion coefficient of glass powder cells warping. By DSC, XRD, SEM analysis of the nature and mechanism of the nature of the glass powder and sintered samples. The coefficient of thermal expansion was analyzed by the coefficient of thermal expansion of the glass melt. The results are as follows:(1) Glass powder milling process for milling24hours, the pellet ethanol ratio of2.5:1:1, mill speed of425rev/min, grinding ball gradation for:in:ball ratio of3:2:1, the proceeds of the glass particle size as the D502μm.(2) Crystalline silicon solar cell positive electrode paste with glass powder system for the Pb-Si-B-Al-Bi, the better the ingredients for the65wt%PbO-17wt%SiO2-4wt%B2O3-6wt%Al2O3-7wt%Bi2O3-0.8wt.%Sb2O5-than0.2wt%NH4NO3is monocrystalline silicon solar cells conversion efficiency of17.72%.(3) The back of the electrode paste of crystalline silicon solar cells using the glass powder system Si-Al-Bi-B (-Zn-Mg), the better the ingredients for the15wt%SiO2-4wt%ZnO-65wt%Bi2O3-15wt%B2O3-lwt%of A12O3, the good wetting of the glass powder and the silicon substrate, the back of the silver bus good weldability, high adhesion strength after soldering.(4) Crystalline silicon solar cells on the back electrode of aluminum plasma with glass powder system Si-Sb-Bi-B-Mg-Na, the better the ingredients:55%of Bi2O3-10%Sb2O5-5%of B2O3-15%SiO2-10%MgCO3and5%Na2CO3(wt%), the coefficient of thermal expansion of the glass system, by the glass powder prepared from the back of the aluminum plasma sintering does not warp, and the formation of the aluminum back surface field.(5) Three systems of the glass powder system liquid phase during sintering, three glass powder system has a lower liquid temperature, and crystallization in the glass state is less crystallization, and glass powdergroped in the preparation process of the glass composition on their performance impact factor, which has laid a good experimental basis for further research and development work after the glass powder.