Laminated solar cell and preparation method therefor, and electrical apparatus

A laminated solar cell, comprising:

• a first sub-cell, a tunneling structure, and a second sub-cell which are sequentially arranged in a first direction, wherein the first direction is an incident direction of sunlight;
• wherein
• the first sub-cell comprises a first carrier transport layer, a first light absorption layer, and a second carrier transport layer which are sequentially arranged in the first direction;
• the second sub-cell comprises a third carrier transport layer, a second light absorption layer, and a fourth carrier transport layer which are sequentially arranged in the first direction;
• and
• the tunneling structure comprises a main body material layer and an auxiliary material layer, the main body material layer comprises a metal-doped metallic oxide, the auxiliary material layer comprises an N-type semiconductor material or a P-type semiconductor material, the auxiliary material layer is located between the main body material layer and the third carrier transport layer, and the main body material layer is located between the second carrier transport layer and the auxiliary material layer.