Stacked monolithic multijunction solar cell

A stacked monolithic multijunction solar cell comprising:

• a first subcell that has a p-n junction with an emitter layer and a base layer, a thickness of the emitter layer being less than a thickness of the base layer at least by a factor of five, and the first subcell comprising a substrate having a semiconductor material from the groups III and V or a substrate from the group IV;
• a second subcell arranged on the first subcell;
• a third subcell arranged on the second subcell, the second and third subcells each including an emitter layer and a base;
• a tunnel diode and a back side field layer being formed between the subcells,
• wherein the second subcell and the third subcell comprise III-V semiconductor materials;
• and
• wherein a thickness of the emitter layer of the second and third layer being greater than a thickness of the base in the second subcell and/or in the third subcell.