US 11,990,555 B2
Solar cell
Jingsheng Jin, Shanghai (CN); Bike Zhang, Shanghai (CN); and Xinyu Zhang, Shanghai (CN)
Assigned to Jinko Green Energy (Shanghai) Management Co., LTD., Shanghai (CN); and Zhejiang Jinko Solar Co., Ltd., Haining (CN)
Filed by Jinko Green Energy (Shanghai) Management Co., LTD., Shanghai (CN); and ZHEJIANG JINKO SOLAR CO., LTD., ZHEJIANG (CN)
Filed on Sep. 23, 2021, as Appl. No. 17/483,689.
Application 17/483,689 is a continuation of application No. 17/112,850, filed on Dec. 4, 2020, granted, now 11,189,739.
Claims priority of application No. 202011308762.X (CN), filed on Nov. 19, 2020.
Prior Publication US 2022/0158009 A1, May 19, 2022
Int. Cl. H01L 31/0224 (2006.01); H01L 31/0216 (2014.01)
CPC H01L 31/022425 (2013.01) [H01L 31/02167 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A solar cell, comprising:
a substrate;
an interface passivation layer on a rear surface of the substrate, wherein the interface passivation layer includes a first interface passivation sub-layer and a second interface passivation sub-layer;
at least one electrode disposed at a side of the interface passivation layer facing away from the substrate, the first interface passivation sub-layer corresponding to a portion of the interface passivation layer between adjacent electrodes, and the second interface passivation sub-layer corresponding to a portion of the interface passivation layer between the substrate and the at least one electrode;
a field passivation layer, at least partially disposed between the interface passivation layer and the at least one electrode; and
a conductivity enhancement layer, at least partially disposed at a side of the first interface passivation sub-layer facing away from the substrate, and configured to enable carriers in the first interface passivation sub-layer to flow to the at least one electrode, wherein a resistivity of a material of the conductivity enhancement layer is smaller than a resistivity of a material of the field passivation layer, and the resistivity of the material of the conductivity enhancement layer is smaller than 0.0010 Ω·cm;
wherein the conductivity enhancement layer covers a surface of the interface passivation layer facing away from the substrate, the field passivation layer covers a surface of the conductivity enhancement layer facing away from the substrate, and the at least one electrode is configured to contact with the field passivation layer.