NOVELTY - The tandem solar cell structure comprises a transparent and flexible substrate (211), a bottom solar cell combination that is disposed on the substrate and comprises solar cell units connected in series with each other, a conductive layer disposed on the bottom solar cell combination, and a top solar cell disposed on the conductive layer and only connected with one of the solar cell units in series. The top solar cell: has a silicon/silicon carbide multi-junction structure and a bandgap energy that is higher than that of the bottom solar cell units; and covers the bottom cell combination.    USE - Used as a tandem solar cell structure.    ADVANTAGE - The tandem solar cell structure can be economically manufactured with improved photoelectric conversion efficiency, reduces current mismatch between a top solar cell and a bottom solar cell combination, and enhances the open circuit voltage.    DETAILED DESCRIPTION - The tandem solar cell structure comprises a transparent and flexible substrate (211), a bottom solar cell combination that is disposed on the substrate and comprises solar cell units connected in series with each other, a conductive layer disposed on the bottom solar cell combination, and a top solar cell disposed on the conductive layer and only connected with one of the solar cell units in series. The top solar cell: has a silicon/silicon carbide multi-junction structure and a bandgap energy that is higher than that of the bottom solar cell units; and covers the bottom cell combination. The substrate is made of glass and metal or organic materials. The solar cell units are: formed by laser scribing, chemical etching or reactive ion etching; and made of a III-V group semiconductor compound or a II-VI group semiconductor compound, organic semiconductor compounds and nanoscale materials. The conductive layer is made of conductive transparent oxide materials or thin and transparent metal materials, and is a tunneling-junction layer. An INDEPENDENT CLAIM is included for a tandem solar cell fabrication method.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a tandem solar cell structure.    Substrate (211)    Conductive metal layer (212)    P-type copper-indium-gallium-selenide layer (213)    N-type cadmium-selenide layer (214)    Zinc oxide layer. (215)