Solar cell and photovoltaic module

A photovoltaic module, comprising:

• a cell string, formed by connecting a plurality of solar cells;
• an encapsulation film, configured for covering a surface of the cell string;
• and
• a cover plate, configured for covering a surface of the encapsulation film facing away from the cell string;
• wherein a respective solar cell of the plurality of solar cells includes:
• a substrate, wherein the substrate has a first surface and a second surface opposite to the first surface, the first surface has first regions and second regions alternatingly arranged thereon, and the second regions are grooves with respect to the first regions;
• a passivation contact structure located at least over the first regions, wherein the passivation contact structure has a first side surface abutting one of the grooves, the one of the grooves has a bottom surface, and a second side surface that connects the bottom surface and the first side surface, the second side surface has a recess recessed inward along a first direction, the recess comprises a first facet and a second facet connected to the first facet, the first facet bordering an adjacent first region, the second facet bordering the bottom surface, and a first obtuse angle is formed between the first facet and the second facet, wherein the first direction is a direction pointing from a respective second region towards an adjacent first region;
• a passivation layer formed over the passivation contact structure and the grooves;
• and
• a first electrode, arranged on the passivation layer and electrically connected to the passivation contact structure.