US 12,408,477 B2
Back-contact solar cell, manufacturing method therefor, and solar-cell assembly
Xiyan Tang, Xi'an (CN); and Liang Fang, Xi'an (CN)
Assigned to LONGi Green Energy Technology Co., Ltd., Xi'an (CN)
Appl. No. 18/728,629
Filed by LONGI GREEN ENERGY TECHNOLOGY CO., LTD., Xi'an (CN)
PCT Filed Oct. 19, 2022, PCT No. PCT/CN2022/126218
§ 371(c)(1), (2) Date Jul. 12, 2024,
PCT Pub. No. WO2023/134249, PCT Pub. Date Jul. 20, 2023.
Claims priority of application No. 202210052750.8 (CN), filed on Jan. 17, 2022.
Prior Publication US 2025/0113652 A1, Apr. 3, 2025
Int. Cl. H10F 77/20 (2025.01); H10F 71/00 (2025.01); H10F 77/30 (2025.01); H10F 77/70 (2025.01)
CPC H10F 77/219 (2025.01) [H10F 71/138 (2025.01); H10F 77/244 (2025.01); H10F 77/311 (2025.01); H10F 77/315 (2025.01); H10F 77/703 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A back-contact solar cell, comprising:
a solar-cell body, comprising:
a silicon substrate;
a first semiconductor layer in a first region of a back surface of the silicon substrate;
a second semiconductor layer having a portion in a second region of the back surface of the silicon substrate, wherein the second region is adjacent to the first region, wherein the first semiconductor layer and the second semiconductor layer have different doping types; and
a transparent conductive film layer stacked on the first semiconductor layer and the second semiconductor layer; and
an isolating groove extending through the second semiconductor layer and the transparent conductive film layer, wherein an area of a cross section of the isolating groove decreases towards the silicon substrate, and the cross section is parallel to the silicon substrate.