A solar cell includes an integrated structure and a reflector. The integrated structure includes a first electrode layer, a P-type silicon layer, an N-type silicon layer, and a second electrode layer arranged in the above sequence; a P-N junction near an interface between the P-type silicon layer and the N-type silicon layer; a photoreceptive surface exposing the P-N junction. The photoreceptive surface is on a curved surface of the integrated structure and is configured to receive incident light beams. The reflector is on another side of the integrated structure, opposite to the photoreceptive surface.