US 12,328,968 B1
Back-contact solar cell, method for preparing the same, and photovoltaic module
Jingjing Zheng, Haining (CN); Hui Liao, Haining (CN); Menglei Xu, Haining (CN); Jie Yang, Haining (CN); and Xinyu Zhang, Haining (CN)
Assigned to JINKO SOLAR (HAINING) CO., LTD., Zhejiang (CN)
Filed by JINKO SOLAR (HAINING) CO., LTD., Haining (CN)
Filed on Mar. 22, 2024, as Appl. No. 18/614,488.
Claims priority of application No. 202311706460.1 (CN), filed on Dec. 12, 2023.
Int. Cl. H10F 77/20 (2025.01); H10F 19/90 (2025.01)
CPC H10F 77/219 (2025.01) [H10F 19/908 (2025.01); H10F 77/215 (2025.01)] 18 Claims
OG exemplary drawing
 
1. A back-contact solar cell, comprising:
a substrate, having a first side, the first side having two opposing first edges perpendicular to a first direction and two opposing second edges perpendicular a second direction, the first direction being perpendicular to the second direction; and
a doped layer, formed on the first side, wherein the doped layer includes:
a plurality of first doped sections, wherein each respective first doped section of the plurality of first doped sections includes a first portion extending along the second direction and a plurality of second portions distributed at intervals along the second direction, each of the plurality of second portions protruding from the first portion in a direction parallel to the second edges; and
a plurality of second doped sections, wherein each respective second doped section of the second doped sections includes a third portion extending along the second direction and a plurality of fourth portions distributed at intervals along the second direction, each of the fourth portions protruding from the third portion in the direction parallel to the second edges, the respective second doped section having a conductivity type different from a conductivity type of the respective first doped section,
wherein the plurality of first doped sections and the plurality of second doped sections are alternatingly arranged in the first direction, and the plurality of first doped sections include an outermost first doped section having its first portion bordering one of the two first edges, another outermost first doped section having its first portion bordering the other one of the two first edges, and first doped sections having their first portions not bordering the two first edges between the two outermost first doped sections, each of a width of the first portion bordering the one of the two first edges and a width of the first portion bordering the other one of the two first edges being larger than a width of any of the first portions not bordering the two first edges;
wherein the plurality of second portions of the respective first doped section and fourth portions of a second doped section next to the respective first doped section are alternatingly arranged along the second direction;
wherein the plurality of second portions of the respective first doped section include an outermost second portion bordering one of the two second edges, another outermost second portion bordering the other one of the two second edges, and one or more other second portions between the two outermost second portions, wherein adjacent outermost second portions bordering the one of the two second edges are connected to each other, and adjacent outermost second portions bordering the other one of the two second edges are connected to each other; and
wherein each of the width of the first portion bordering the one of the two first edges and the width of the first portion bordering the other one of the two first edges differs by a first difference from the width of any of the first portions not bordering the two first edges, the first difference being 50 μm to 200 μm.