▎ 摘　　要

NOVELTY - A perovskite/perovskite tandem solar cell comprises comprises substrate, non-metal conducting layer, transmission layer (A), narrow-bandgap perovskite layer, transmission layer (B), tunneling composite junction, transmission layer (C), wide-bandgap perovskite layer, transmission layer (D), buffer layer and transparent conducting layer. The substrate is a non-conductive substrate and/or conductive metal film. The non-metal conducting layer is made of a conducting material. The tunneling composite junction comprises compact layer and current carrier composite layer. The transparent conducting layer is one or more of indium tin oxide film, aluminum-doped zinc oxide film, gallium-doped zinc oxide film, fluorine-doped tin oxide film, indium zinc oxide film, indium tungsten oxide film, silver nanowire, metal layer or graphene film. USE - Perovskite/perovskite tandem solar cell. ADVANTAGE - The laminated device improves perovskite cell efficiency, simultaneously changes the stability problem caused by the oxygen sensitivity of the lead-tin perovskiite. The advanced structure reduces the perovkiite solar cell to flat, transparent and the dependence of the conductive substrate. The non-metal conductive layer is mainly used for preventing potential reaction between perovskite and the substrate. DETAILED DESCRIPTION - A perovskite/perovskite tandem solar cell comprises the light-facing surface sequentially comprises substrate, non-metal conducting layer, transmission layer (A), narrow-bandgap perovskite layer, transmission layer (B), tunneling composite junction, transmission layer (C), wide-bandgap perovskite layer, transmission layer (D), buffer layer and transparent conducting layer. The substrate is a non-conductive substrate and/or conductive metal film. The non-metal conducting layer is made of a conducting material. The tunneling composite junction comprises compact layer and current carrier composite layer. The compact layer is directly connected with transmission layer (B). The compact layer is made of one or more of molybdenum oxide, vanadium oxide, 2,9-dimethyl-4,7-biphenyl-1,10-phenanthroline, tin oxide, titanium oxide or tungsten oxide. The current carrier composite layer comprises metal nanoparticle film, non-compact metal island structure, metal oxide nanoparticle or metal oxide film. The buffer layer is made of one or more of molybdenum oxide, vanadium oxide, 2, 9-dimethyl-4,7-biphenyl-1, 10-phenanthroline, tin oxide, titanium oxide or tungsten oxide. The transparent conducting layer is one or more of indium tin oxide film, aluminum-doped zinc oxide film, gallium-doped zinc oxide film, fluorine-doped tin oxide film, indium zinc oxide film, indium tungsten oxide film, silver nanowire, metal layer or graphene film. An INDEPENDENT CLAIM is included for the preparation of the perovskite/perovskite tandem solar cell.