Previously, OFweek Solar PV Network introduced the differences between TOPCON and heterojunction cell technologies in the post-PERC era. The former has more production process steps and limited room for cost reduction, but it is regarded by many module manufacturers as the cell technology to be developed first. In addition to being able to share production lines with PERC cells, the use of less silver paste is also an important reason.
The primary function of silver paste in modules is to conduct electricity generated by the solar cells, significantly impacting cell efficiency. Furthermore, as a consumable, it also greatly affects module costs. In addition, the recent surge in precious metal prices has put considerable pressure on module manufacturers.
At the recently concluded SNEC exhibition, Heraeus launched a new range of photovoltaic paste products. These include the SOL9681 series for monocrystalline PERC cells; the SOL7300 Pro silver paste for N-type TOPCon cells; and the SOL590 Pro silver paste for heterojunction cells.
Covering multiple technical routes, especially the SOL590 Pro silver paste launched for heterojunction solar cells, Heraeus took the initiative while many companies were still observing. This not only demonstrates Heraeus' strength but also shows its strategic planning for future technologies, which is worth learning from for Chinese companies.
Although Chinese companies have basically mastered photovoltaic silver paste technology, they are still lacking in low-temperature silver paste required for heterojunction cells. They need to continue their efforts to bring higher conversion efficiency battery technology to fruition and help the photovoltaic industry develop.
