The present application relates to a method for preparing photovoltaic cells, photovoltaic cells, stacked cells and photovoltaic
cell modules. An
initial cell is provided; a protective layer is deposited on the surface; two
laser treatments are performed; printing and
sintering are performed to form electrodes; and the electrodes are subjected to at least two
laser-assisted sinterings. The above-mentioned method for preparing photovoltaic cells, by removing the protective layer at the first area and increasing the
doping concentration at the first area, is combined with at least two
laser-assisted sinterings. On the one hand, by optimizing the
metal contact area, it is beneficial to reduce the amount of
silver paste used, thereby reducing material costs, while enhancing the contact
sintering of the paste and removing the damage caused by laser grooving
doping; on the other hand, the
doping concentration is optimized, which significantly reduces the
contact resistance, is beneficial to increasing the
open circuit voltage and
filling factor, while reducing the shading loss and ensuring the current collection efficiency, thereby significantly improving the
photoelectric conversion efficiency and reliability of the
cell, simplifying the production process and reducing the production cost.