Solar cell system

A solar cell system comprises:

• a plurality of P-N junction cells comprising M number of P-N junction cells, M being equal to or greater than 2, the plurality of P-N junction cells being arranged from a first P-N junction cell to an Mth P-N junction cell along a straight line and being electrically connected to each other in series;
• an inner electrode between each adjacent two of the plurality of P-N junction cells, a number of the inner electrode being M−1, at least one of the inner electrode comprising an array of carbon nanotubes;
• a first collecting electrode on an outside surface of the first P-N junction cell;
• a second collecting electrode on an outside surface of the Mth P-N junction cell;
• a reflector;
• a photoreceptive surface configured to directly receive incident light beams, the photoreceptive surface being a surface of the solar cell system and parallel to the straight line;
• and
• an emitting surface opposite to the photoreceptive surface, the emitting surface being another surface of the solar cell system, and the reflector being on the emitting surface.