Two-level metallization and module integration of point-contacted solar cells

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Schulte-Huxel, H.; Römer, U.; Blankemeyer, S.; Merkle, A.; Larionova, Y.; et al.: Two-level metallization and module integration of point-contacted solar cells. In: Energy Procedia 55 (2014), S. 361-368. DOI:

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Sum total of downloads: 142

We present a module integration process for back junction back contact (BJBC) solar cells featuring point contacts to the back surface field (BSF). We apply two metallization layers. A first metal layer of aluminum is deposited onto the rear side of the cell and carries the current extracted from the polarity with the larger surface area fraction, e.g. from the emitter. The second metallization layer is an Al layer on a transparent substrate that we laser-weld to the small and point-shaped regions of the other polarity, e.g. the BSF region. We use a polymer for insulation between the two metal layers. The Al layer on the substrate also serves for cell interconnection, i.e., it enables module integration. Such an interconnection structure halves the fill factor losses due to the metallization. First proof-of-principle modules show a shunt free interconnection, no laser-induced damage, and an energy conversion efficiency of up to 20.7%.
License of this version: CC BY-NC-ND 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 117 82.39%
2 image of flag of Russian Federation Russian Federation 10 7.04%
3 image of flag of United States United States 6 4.23%
4 image of flag of United Kingdom United Kingdom 2 1.41%
5 image of flag of China China 2 1.41%
6 image of flag of Turkey Turkey 1 0.70%
7 image of flag of Morocco Morocco 1 0.70%
8 image of flag of Europe Europe 1 0.70%
9 image of flag of Czech Republic Czech Republic 1 0.70%
10 image of flag of Argentina Argentina 1 0.70%

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