Abstract: A photovoltaic cell and a fabricating method of the photovoltaic cell are provided. The photovoltaic cell includes: a substrate layer; an emitter layer, wherein the emitter layer is provided at a first face of the substrate layer; a plurality of front-face metal grid lines, wherein the plurality of front-face metal grid lines are provided in parallel at a side of the emitter layer that is away from the substrate layer; and a plurality of diffuse-reflection layers, wherein the plurality of diffuse-reflection layers are provided individually at a side of each of the front-face metal grid lines that are away from the emitter layer, and the diffuse-reflection layers are in correspondence with the front-face metal grid lines one to one. The diffuse-reflection layers are provided on the front-face metal grid lines to increase the diffuse reflection of the light emitting the front-face metal grid lines.

Abstract: A solar-cell piece and a solar-cell assembly, wherein the solar-cell piece includes a plurality of sub-cell-piece units and solder strips, wherein neighboring sub-cell-piece units are superposed, and are connected by the solder strips to form a cell string; and each of the sub-cell-piece units is provided with solder-strip containing slots in positions where the solder strips are located in superposed areas of a front face and a back face, and supporting structures are provided between neighboring solder-strip containing slots. The superposition between the supporting structures at the front face and the back face of the two neighboring sub-cell-piece units can reduce the height difference at the overlapping position, to disperse and release the stress between the neighboring cell pieces generated by the solder strip.

Abstract: A method of fabricating a solar cell is described. The solar cell can include a photovoltaic structure and a metallic grid on the photovoltaic structure. The metallic grid can include one or more electroplated metal layers, a busbar, and a plurality of finger lines connected to the busbar, where one or more finger lines have variable widths.