US 12,230,723 B2
Back-side metal electrode of N-type TOPCon solar cell, and method for preparing back-side metal electrode of N-type TOPCon solar cell, and N-type TOPCon solar cell
Mingzhang Feng, Zhejiang (CN); Jinfang Yang, Zhejiang (CN); Sheng He, Zhejiang (CN); and Wei-Chih Hsu, Taiwan (TW)
Assigned to CHINT NEW ENERGY TECHNOLOGY CO., LTD., Zhejiang (CN)
Appl. No. 18/039,201
Filed by CHINT NEW ENERGY TECHNOLOGY CO., LTD., Zhejiang (CN)
PCT Filed May 10, 2021, PCT No. PCT/CN2021/092544
§ 371(c)(1), (2) Date May 26, 2023,
PCT Pub. No. WO2022/142054, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 202011582094.X (CN), filed on Dec. 28, 2020.
Prior Publication US 2023/0420583 A1, Dec. 28, 2023
Int. Cl. H01L 31/0224 (2006.01); H01L 31/0216 (2014.01); H01L 31/0236 (2006.01); H01L 31/18 (2006.01)
CPC H01L 31/022433 (2013.01) [H01L 31/02168 (2013.01); H01L 31/02363 (2013.01); H01L 31/1868 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A back-side metal electrode of an N-type TOPCon solar cell, comprising a substrate, and further comprising a plurality of first silver fine grids disposed on a passivation film which is on a back side of the substrate, a plurality of second aluminum fine grids overlaid on the plurality of first silver fine grids, and a plurality of first silver main grids disposed perpendicular to the plurality of first silver fine grids, wherein each of the plurality of first silver main grids is a segmented structure, and the segmented structure comprises a plurality of grid segments which are disposed at intervals; and the back-side metal electrode further comprises a plurality of second aluminum main grids, which are formed, in a printing manner, between any two adjacent grid segments of the plurality of grid segments and around each of the plurality of grid segments.