Silver is a metallic element with strong ductility, excellent electrical and thermal conductivity, and stable chemical properties. It is the substance with the highest thermal and electrical conductivity among all substances, and its electrical conductivity is about 5.7% higher than that of copper. Broadly speaking, in the production of monocrystalline silicon or polysilicon solar cells, silver paste will be coated on the front and back electrodes of each cell, which is the thin white line that we see in the solar cell, the thick one is the gate line, and the tiny thin line is the silver line. solar cable prices china Look here.
It is printed by screen printing, this line is extremely thin, but also can play a conductive role, which requires the use of materials with the function of reducing resistance, improve the efficiency of the solar panel, and silver is such a substance, in order to ensure the convenience of printing, when in use is silver paste state, its usage is extremely tiny, It may take 60 solar cells to extract 8 grams of silver, but it is still costly compared to other metals.
With the rapid development of science and technology, in order to reduce the production cost of panels, numerous manufacturers gradually reduce the amount of silver under the premise of ensuring the normal use of panels, and even some solar panels do not need silver in the production process. In general, there is silver in solar panels, but the amount is so tiny that if you want to make a fortune from recycling solar panels, it's nearly impossible.