Patent ID: 8623693

Claim:
A solar cell system making method, comprising steps of: S 11 , making a round P-N junction by (a) stacking a P-type silicon layer and a N-type silicon layer on top of each other, and (b) forming the round P-N junction near an interface between the P-type silicon layer and the N-type silicon layer; S 12 , cutting the round P-N junction into a plurality of arc shaped solar cell preforms; S 13 , forming an arc shaped surface by stacking the plurality of arc shaped solar cell preforms along a first direction, forming an electrode layer between each adjacent two of the plurality of arc shaped solar cell preforms, and electrically connecting each adjacent two of the plurality of arc shaped solar cell preforms in series; and S 14 , forming a first collection electrode on a first of the plurality of arc shaped solar cell preforms and forming a second collection electrode on a last of the plurality of arc shaped solar cell preforms thereby forming an arc shaped solar cell system comprising a photoreceptive surface on the arc shaped surface and configured to receive incident light beams.