Solar cell and photovoltaic module

A photovoltaic module, comprising:

• a plurality of solar cells, wherein at least part of the solar cells is electrically connected in a splicing or laminating manner and packaged through a packaging material, and at least one of the solar cells includes:
• a crystalline silicon substrate;
• a first passivation contact step provided on a surface of the crystalline silicon substrate;
• a second passivation contact step provided on a surface of the first passivation contact step away from the crystalline silicon substrate and located corresponding to an electrode;
• a first passivation antireflection step provided at regions on the surface of the first passivation contact step away from the crystalline silicon substrate and not in contact with the second passivation contact step;
• a second passivation antireflection step provided on a surface of the second passivation contact step away from the first passivation contact step;
• and
• the electrode including a side in direct contact with the first passivation contact step and another side penetrating through the second passivation contact step and the second passivation antireflection step.