Solar cell and a method for their preparation

Solar cell substrate; Emitters positioned on the front (front surface) of the substrate taboo; A first reflection film that is formed on the emitter layer; Back around the system unit which is located on the back side of the substrate (back surface); And a second anti-reflection film which is located below the rear surface of the substrate, the first anti-reflection film and the second reflection film are overlapped with each other in at least a portion of the side edge portions and the edge portions of the back of the front of the substrate.