Solar cell, sliced cell and manufacturing method thereof, photovoltaic module, and photovoltaic system

A solar cell, comprising:

• a substrate, a doped conductive layer, a first passivation film layer, a first dielectric layer, a passivated contact layer, a second passivation film layer, and a second electrode;
• wherein the doped conductive layer is arranged on a first surface of the substrate;
• wherein the first passivation film layer and the first dielectric layer are sequentially stacked on a side of the doped conductive layer facing away from the substrate;
• wherein the doped conductive layer, the first passivation film layer, and the first dielectric layer all cover the first surface of the substrate;
• wherein the substrate further includes a plurality of first side surfaces adjacent to the first surface, and the first passivation film layer further covers at least part of surfaces of the plurality of first side surfaces;
• wherein the substrate further includes a second surface adjacent to the plurality of first side surfaces and opposite to the first surface, the passivated contact layer is arranged on the second surface of the substrate, the passivated contact layer includes a tunnel oxide layer and a polysilicon doped conductive layer sequentially stacked on the second surface of the substrate;
• wherein the second passivation film layer is stacked on a surface of the passivated contact layer facing away from the substrate, and the passivated contact layer and the second passivation film layer both cover the second surface of the substrate;
• wherein a part of the first passivation film layer further covers the second surface of the substrate, and covers an edge region of the passivated contact layer located on the second surface of the substrate, and the part of the first passivation film layer covering the edge region is located between the second passivation film layer and the passivated contact layer on the second surface;
• wherein the second electrode is arranged on the second passivation film layer, passing through the second passivation film layer, and being in ohmic contact with the passivated contact layer;
• wherein the first passivation film layer is spaced from the second electrode by the second passivation film layer on the second surface;
• and
• wherein the first passivation film layer and the second passivation film layer being made of different materials.