NOVELTY - An electronic device comprises: a heterojunction portion (802) closer to a first surface of the electronic device, where the first surface is a light-receiving surface; a homojunction portion (702) closer to a second surface of the electronic device opposite the first surface; and point electrical connections to regions of the homojunction portion, where the point electrical connections are spaced apart from each other.    USE - As electronic device comprising photovoltaic device (claimed) for a standalone wafer.    ADVANTAGE - The photovoltaic device has a lateral dimension and a vertical displacement associated with a curve, where a ratio of the lateral dimension to the vertical displacement is at least approximately 1:1, at least approximately 2:1, or at least approximately 4:1, or is not greater than 40:1, not greater than 20:1, or not greater than 10:1; has a concave surface and a convex surface opposite the concave surface; and prepared by cost fabrication method. The electronic device may be relatively flat.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) forming an electronic device involving: forming doped regions adjacent to a substrate including a semiconductor material; forming point electrical connections to the substrate; forming a metal-containing layer over the point electrical connections and the substrate; separating a first semiconductor layer, the point electrical connections, and the metal-containing layer from a remaining portion of the substrate, where, immediately after separating, a newly-formed surface of a first semiconductor layer and a newly-formed surface of the remaining portion have a same semiconductor composition; and forming a heterojunction portion after separating the first semiconductor layer; and    (2) forming an electronic device comprising a photovoltaic device, involving: providing a combination of a first semiconductor layer and a metal-containing layer, where the combination is curved; mounting the combination to a workpiece holder, where, while the combination is mounted, the combination is less curved as compared to before mounting; and forming another layer over the combination while the combination is mounted.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a photovoltaic cell.    Metal-containing layer (302)    Homojunction portion (702)    Heterojunction portion (802)    Semiconductor layer (804)    Doped region (806)    Conductive layer (902)    Principal conductor (904)