US 12,446,352 B2
Back contact solar cell and manufacturing method therefor, and photovoltaic module
Shenghou Zhou, Xi'an (CN); Xiyan Tang, Xi'an (CN); Zhaoqing Sun, Xi'an (CN); Xiaoyu Deng, Xi'an (CN); Liang Fang, Xi'an (CN); Feng Ye, Xi'an (CN); and Xixiang Xu, Xi'an (CN)
Assigned to LONGi Green Energy Technology Co., Ltd., Xi'an (CN)
Appl. No. 19/108,260
Filed by LONGI GREEN ENERGY TECHNOLOGY CO., LTD., Xi'an (CN)
PCT Filed Sep. 1, 2023, PCT No. PCT/CN2023/116537
§ 371(c)(1), (2) Date Mar. 3, 2025,
PCT Pub. No. WO2024/114009, PCT Pub. Date Jun. 6, 2024.
Claims priority of application No. 202211538525.1 (CN), filed on Dec. 1, 2022.
Prior Publication US 2025/0261475 A1, Aug. 14, 2025
Int. Cl. H10F 77/14 (2025.01); H10F 77/20 (2025.01)
CPC H10F 77/147 (2025.01) [H10F 77/219 (2025.01)] 12 Claims
OG exemplary drawing
 
1. A back contact solar cell, comprising:
a semiconductor substrate, wherein the semiconductor substrate comprises a first surface and a second surface opposite to the first surface, wherein along a direction parallel to the second surface, the second surface comprises N-type regions and P-type regions alternately distributed at intervals, and an isolating region located between each of the N-type regions and a corresponding P-type region;
a transparent conductive layer covering the second surface, wherein an isolating groove extending through at least the transparent conductive layer is formed on each isolating region, and the isolating groove is configured to isolate a part of the transparent conductive layer located on an N-type region from a part of the transparent conductive layer located on a P-type region; and
an isolating protective structure, formed on a partial region of a groove bottom of the isolating groove, wherein a material of the isolating protective structure at least comprises a material of the transparent conductive layer, wherein along a length direction of the isolating groove, and the isolating protective structure comprises at least two isolating protective portions spaced apart from each other.