Solar cell, solar cell module, and method for manufacturing solar cell

A solar cell, comprising:

• a semiconductor substrate having a light receiving surface and a back surface opposite to the light receiving surface;
• an ultra-thin dielectric layer, formed on at least one of the back surface and the light receiving surface;
• a passivation layer, formed on the ultra-thin dielectric layer;
• a first electrode, formed on the passivation layer;
• and
• metallic crystals, formed in the passivation layer, wherein the metallic crystals comprise:
• first crystals connected to the first electrode and spaced apart from each other, wherein each of the first crystals has a thickness less than a thickness of the passivation layer;
• and
• second crystals spaced apart from the first electrode and the ultra-thin dielectric layer,
• wherein the first crystals are spaced apart from the second crystals,
• wherein a ratio of a quantity of the first crystals to a quantity of the metallic crystals is greater than or equal to 50% and less than or equal to 90%, and
• wherein a ratio of a quantity of the second crystals to the quantity of the metallic crystals is less than or equal to 5%.