Details
| Original language | English |
|---|---|
| Pages (from-to) | 1057-1065 |
| Number of pages | 9 |
| Journal | Progress in Photovoltaics: Research and Applications |
| Volume | 23 |
| Issue number | 8 |
| Publication status | Published - 29 May 2014 |
Abstract
We are presenting the module integration of busbar-free back-junction back-contact (BJBC) solar cells. Our proof-of-concept module has a fill factor of 80.5% and a conversion efficiency on the designated area of 22.1% prior to lamination. A pulsed laser welds the Al metallization of the solar cells to an Al foil carried by a transparent substrate. The weld spots electrically contact each individual finger to the Al foil, which serves as interconnect between different cells. We produce a proof-of-concept module using busbar-free cell strips of 25 × 125 mm2. These are obtained by laser-dicing of a 125 × 125 mm2 BJBC solar cell. The fill factor of this module is increased by 3.5% absolute compared with the initial cell before laser-dicing. This is achieved mainly by omitting the busbars and reduction of the finger length. The improvement of the module fill factor results in an increase in the module performance of 0.9% absolute before lamination in comparison with the efficiency of the initial 125 × 125 mm2 BJBC solar cell. Hence, this interconnection scheme enables the transfer of high cell efficiencies to the module.
Keywords
- Al metallization, back-junction back-contact solar cell, laser welding, module interconnection, multilevel metallization, photovoltaic module, silver-free
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: Progress in Photovoltaics: Research and Applications, Vol. 23, No. 8, 29.05.2014, p. 1057-1065.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Interconnection of busbar-free back contacted solar cells by laser welding
AU - Schulte-Huxel, Henning
AU - Blankemeyer, Susanne
AU - Merkle, Agnes
AU - Steckenreiter, Verena
AU - Kajari-Schröder, Sarah
AU - Brendel, Rolf
PY - 2014/5/29
Y1 - 2014/5/29
N2 - We are presenting the module integration of busbar-free back-junction back-contact (BJBC) solar cells. Our proof-of-concept module has a fill factor of 80.5% and a conversion efficiency on the designated area of 22.1% prior to lamination. A pulsed laser welds the Al metallization of the solar cells to an Al foil carried by a transparent substrate. The weld spots electrically contact each individual finger to the Al foil, which serves as interconnect between different cells. We produce a proof-of-concept module using busbar-free cell strips of 25 × 125 mm2. These are obtained by laser-dicing of a 125 × 125 mm2 BJBC solar cell. The fill factor of this module is increased by 3.5% absolute compared with the initial cell before laser-dicing. This is achieved mainly by omitting the busbars and reduction of the finger length. The improvement of the module fill factor results in an increase in the module performance of 0.9% absolute before lamination in comparison with the efficiency of the initial 125 × 125 mm2 BJBC solar cell. Hence, this interconnection scheme enables the transfer of high cell efficiencies to the module.
AB - We are presenting the module integration of busbar-free back-junction back-contact (BJBC) solar cells. Our proof-of-concept module has a fill factor of 80.5% and a conversion efficiency on the designated area of 22.1% prior to lamination. A pulsed laser welds the Al metallization of the solar cells to an Al foil carried by a transparent substrate. The weld spots electrically contact each individual finger to the Al foil, which serves as interconnect between different cells. We produce a proof-of-concept module using busbar-free cell strips of 25 × 125 mm2. These are obtained by laser-dicing of a 125 × 125 mm2 BJBC solar cell. The fill factor of this module is increased by 3.5% absolute compared with the initial cell before laser-dicing. This is achieved mainly by omitting the busbars and reduction of the finger length. The improvement of the module fill factor results in an increase in the module performance of 0.9% absolute before lamination in comparison with the efficiency of the initial 125 × 125 mm2 BJBC solar cell. Hence, this interconnection scheme enables the transfer of high cell efficiencies to the module.
KW - Al metallization
KW - back-junction back-contact solar cell
KW - laser welding
KW - module interconnection
KW - multilevel metallization
KW - photovoltaic module
KW - silver-free
UR - http://www.scopus.com/inward/record.url?scp=84936890370&partnerID=8YFLogxK
U2 - 10.1002/pip.2514
DO - 10.1002/pip.2514
M3 - Article
AN - SCOPUS:84936890370
VL - 23
SP - 1057
EP - 1065
JO - Progress in Photovoltaics: Research and Applications
JF - Progress in Photovoltaics: Research and Applications
SN - 1062-7995
IS - 8
ER -