Perovskite-based tandem solar cell, preparation method, and power consuming apparatus

A perovskite-based tandem solar cell, comprising a first perovskite sub-cell, a carrier recombination layer, and a second perovskite sub-cell that are sequentially stacked, wherein:

• the first perovskite sub-cell comprises a first perovskite layer, the second perovskite sub-cell comprises a second perovskite layer, and a band gap of the first perovskite layer is different from a band gap of the second perovskite layer;
• a thickness direction of the first perovskite layer is denoted as a longitudinal direction;
• a surface of a side of the first perovskite layer close to the carrier recombination layer is a non-smooth surface, the non-smooth surface is provided with grooves, and ridges are formed between at least some adjacent grooves;
• and
• the tandem solar cell satisfies at least one of the following features:
• at least some of the grooves have different widths at at least some depth positions;
• and
• at least some of the ridges have different widths at at least some height positions.