The high-strength dense grid process is a development direction for solar cells to improve the efficiency of photoelectric conversion. It uses increasing the number of main gate lines to reduce series resistance. High resistance refers to greater diffusion resistance. diffusion resistance, the smaller the number of minority carriers. The less recombination on the surface, the higher the short circuit current, and therefore the higher the photoelectric conversion efficiency. However, since the printing paste for the main grid lines on the front of. the solar cell is generally made of silver paste, increasing the number of network main lines will inevitably increase the consumption of silver paste, thereby increasing the production cost of solar cells.
“12BB” refers to a cell organizational structures Since a large number of cells on a solar panel must be connected in series to form a battery, the organizational structure of the cells affects performance and. the efficiency of the entire solar panel has a big impact.
The “12BB” structure means that on the solar panel, 12 thinner metal grid wires are used inside each cell for electrical interconnection, which can reduce the current flowing through a single metal grid wire. The resistance generated improves. the photoelectric conversion efficiency of the solar panel. In addition, 12BB cells can also improve the pressure resistance of cells and the reliability of photovoltaic panels in harsh environments such as high temperatures and humidity. At present, 12BB solar cells are very common in the market and are widely used in the production of varioussolar panels.