| The front silver paste consists of silver powder, glass composition and adhesive, etc. The physical and chemical changes between the silver paste and the silicon substrate during sintering were analyzed according to the resistance composition of the silicon photovoltaic cell and the characteristics of each component of the front silver paste. The front silver paste is made of high density spherical silver powder and Pb-Te glass. After sintering, the Grid line has a large enough height width ratio to increase the cross-section area of the lines, so that the fine grid wire resistance (Rf) can reach the minimum value. During sintering, lead and tellurium and their compounds are reduced, and forms an eutectic conductive interlayer with the silicon substrate to minimize the front contact resistance (Rfc). The series resistance (Rs) of the silicon solar cell becomes smaller, and its photoelectricity conversion efficiency is improved. |
