US 11,929,441 B2
Conductive contact structure of solar cell, solar module, and power generation system
Yongqian Wang, Yiwu (CN); Wenli Xu, Yiwu (CN); Jianjun Zhang, Yiwu (CN); Jianbo Hong, Yiwu (CN); and Gang Chen, Yiwu (CN)
Assigned to SOLARLAB AIKO EUROPE GMBH, Freiburg (DE)
Filed by Solarlab Aiko Europe GmbH, Freiburg (DE)
Filed on Jun. 20, 2022, as Appl. No. 17/844,709.
Claims priority of application No. 202210239253.9 (CN), filed on Mar. 11, 2022.
Prior Publication US 2023/0290893 A1, Sep. 14, 2023
Int. Cl. H01L 31/0224 (2006.01); H01L 31/05 (2014.01); H01L 31/054 (2014.01)
CPC H01L 31/022425 (2013.01) [H01L 31/05 (2013.01); H01L 31/0543 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A conductive contact structure of a solar cell, the conductive contact structure comprising:
a substrate;
a semiconductor region; and
an electrode;
wherein:
the semiconductor region is disposed on or in the substrate;
the electrode is disposed on the semiconductor region;
the electrode comprises:
a seed layer in contact with the semiconductor region, wherein the seed layer comprises an alloy material, which comprises a first component and a second component, wherein:
the first component is Al in an amount greater than or equal to 70 wt. % of the seed layer; and
the second component comprises any one or more of Mo, Ti, and W in an amount less than or equal to 30 wt. % of the seed layer; and
a conductive layer comprising Cu disposed above the seed layer.