NOVELTY - Solar cell comprises: (a) a substrate having a front side and a back side; (b) a first active region; (c) a second active region; (d) a front region that connects the top of the first active region to the top of the second active region; (e) a first conductive contact; and (f) a second conductive contact.    USE - The solar cell is useful for solar energy conversion.    ADVANTAGE - The back-side contact solar cell has an efficiency advantage over those with front-side conductive contacts. The solar cell has also separate active regions in which current flows in different directions.    DETAILED DESCRIPTION - Solar cell comprises: (a) a substrate having a front side and a back side, where the substrate has a first region that is n-doped and a second region that is p-doped; (b) a first active region above the n-doped region of the substrate, where the first active region has a top; (c) a second active region above the p-doped region of the substrate, where the second active region has a top; (d) a front region that connects the top of the first active region to the top of the second active region to allow charge carriers to transfer from one of the active regions to the other active region; (e) a first conductive contact on the back side of the substrate and proximate the n-doped region; and (f) a second conductive contact on the back side of the substrate and proximate the p-doped region. An INDEPENDENT CLAIM is included for a method of forming a solar cell comprising: (a) doping a first region of a substrate with an n-type dopant; (b) doping a second region of the substrate with a p-type dopant, where the substrate has a front side and a back side; (c) forming a first active region above the n-doped region of the substrate, where the first active region has a top; (d) forming a second active region above the p-doped region of the substrate, where the second active region has a top; (e) forming a front region that connects the top of the first active region to the top of the second active region to allow charge carriers to transfer from one of the active regions to the other active region; (f) forming a first conductive contact on the back side of the substrate and proximate the n-doped region; and (g) forming a second conductive contact on the back side of the substrate and proximate the p-doped region.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the solar cell.    Active regions (96a,96b)    Top or front layer (103)    Substrate (108)    Conductive contacts (110a,110b)    Electrical leads (112a,112b)