Solar cell and manufacturing method thereof, and photovoltaic module

A method for manufacturing a solar cell comprising:

• providing a bottom cell, the bottom cell comprising a front surface and a back surface opposite to each other;
• forming an inter layer on the front surface of the bottom cell;
• forming a perovskite top cell on the inter layer, the perovskite top cell comprising a hole transport layer, a perovskite layer, an electron transport layer, and a conductive structure stacked on the inter layer, wherein the conductive structure comprises at least one stack, each stack comprises a first conductive layer and a second conductive layer, the second conductive layer is located between the first conductive layer and the electron transport layer, the first conductive layer comprises a first transparent conductive film, the second conductive layer comprises a metal conductive film in a metallization region and a second transparent conductive film in a non-metallization region;
• and
• forming a back electrode on the back surface of the bottom cell;
• wherein a material of the metal conductive film comprises at least one of Ni, Cu, Al, Sn, and Zn;
• wherein a thickness of the second conductive layer is greater than a thickness of the first conductive layer,
• wherein the solar cell further comprises a front electrode located on a surface of an outermost first conductive layer of the first conductive layer in the conductive structure, and
• wherein a ratio of a height of the front electrode to a height of the back electrode is greater than or equal to 0.1.

A photovoltaic module comprising a plurality of solar cell strings, and each of the solar cell strings comprising a plurality of solar cells electrically connected to each other, wherein at least one of the plurality of solar cells each comprises:

• a bottom cell, comprising a front surface and a back surface opposite to each other;
• a perovskite top cell;
• an inter layer between the front surface of the bottom cell and the perovskite top cell;
• and
• a back electrode located on the back surface of the bottom cell,
• wherein the perovskite top cell comprises a hole transport layer, a perovskite layer, an electron transport layer, and a conductive structure stacked on the inter layer,
• wherein the conductive structure comprises at least one stack, each stack comprises a first conductive layer and a second conductive layer, the second conductive layer is located between the first conductive layer and the electron transport layer, the first conductive layer comprises a first transparent conductive film, and the second conductive layer comprises a metal conductive film in a metallization region and a second transparent conductive film in a non-metallization region;
• wherein a material of the metal conductive film comprises at least one of Ni, Cu, Al, Sn, and Zn;
• wherein a thickness of the second conductive layer is greater than a thickness of the first conductive layer,
• wherein the solar cell further comprises a front electrode located on a surface of an outermost first conductive layer of the first conductive layer in the conductive structure, and
• wherein a ratio of a height of the front electrode to a height of the back electrode is greater than or equal to 0.1.