Photovoltaic module and method for preparing the same

A method for preparing a photovoltaic module, comprising:

• printing a grid line paste on a semi-finished solar cell, and sintering the grid line paste to form a grid line precursor, wherein the semi-finished solar cell comprises a substrate having a pyramidal textured structure on a surface thereof, and a semiconductor layer and a passivation layer that are sequentially provided on the substrate;
• subjecting the grid line precursor to a laser-induced contact treatment to form a metal grid line, and enabling the metal grid line to extend through the passivation layer to be in a direct contact with the semiconductor layer to obtain a solar cell, wherein a plurality of enhancing conductive microstructures are formed at a contact interface between the metal grid line and the semiconductor layer, and the plurality of enhancing conductive microstructures are aggregated in a specified area of the pyramidal textured structure, and the specified area is an area centered on a tip of the pyramidal textured structure on the surface of the semiconductor layer and within a distance from the tip of less than or equal to 1 μm;
• placing an electrical connector on the metal grid line, and pressing the electrical connector, such that the electrical connector and the metal grid line have a conductive contact area;
• applying an adhesive to the conductive contact area to connect a plurality of solar cells into a cell string, wherein pressing the electrical connector and applying the adhesive are performed at a predetermined temperature less than or equal to 180° C., and the enhancing conductive microstructure are aggregated in the specified area in the solar cells of the cell string;
• and
• stacking and laminating the cell string to obtain the photovoltaic module.