Solar cell

A solar cell comprising:

• a substrate comprised of crystalline silicon;
• a first semiconductor layer arranged on a back surface of the substrate;
• a second semiconductor layer arranged on a front surface of the substrate which is configured to face a radiative source, when the solar cell is in use;
• a first transparent-conductive region arranged on a surface of the first semiconductor layer, wherein the first transparent conductive region comprises:
• a first rear layer having a first rear work function;
• and
• a second rear layer having a second rear work function and being interposed between the first rear layer and the first semiconductor layer;
• wherein the second rear work function of the second rear layer is greater than the first rear work function of the first rear layer;
• and
• a second transparent-conductive region being arranged on a surface of the second semiconductor layer, wherein the second transparent-conductive region comprises:
• a first front layer having a first front work function;
• and
• a second front layer having a second front work function and being interposed between the first front layer and the second semiconductor layer;
• and
• a third front layer being interposed between the second front layer and the second semiconductor layer and arranged directly on the second semiconductor layer;
• wherein the second front work function of the second front layer is greater than the first front work function of the first front layer;
• wherein the third front layer is configured with a third front work function which is greater than the second front work function of the second front layer;
• and
• wherein the second semiconductor layer comprises amorphous silicon (a-Si).