Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) |
| Herausgeber (Verlag) | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (elektronisch) | 9781479979448 |
| Publikationsstatus | Veröffentlicht - 14 Dez. 2015 |
| Veranstaltung | 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, USA / Vereinigte Staaten Dauer: 14 Juni 2015 → 19 Juni 2015 |
Abstract
Laser welding of thin Al layers offers a silver-free and highly flexible option for the interconnection of Al metallized solar cells. Welding requires the melting of the Al layers in order to form a reliable electrical contact. Here, we investigate the process driving the melt front of the Al towards the interface between the two Al layer. In experiments we observe two different mechanisms depending on the thickness of the irradiated layer. In the case of Al layers thinner than 5 μm a melt-through of the Al-layer is observed, whereas for thicker layers thermal expansion causes a breakage of the surface and ejection of molten Al, which enables the contact formation. Using simulations based on finite element method we instigate the mechanisms leading to the different behavior. The simulations match the experimental results with the experimental measurement uncertainty. In case of thin layers, the simulation show that the process is limited by thermal diffusion. For thicker Al layers the onset of melting on the front side initiates the breakage of the surface and the ejection of the aluminum.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
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- BibTex
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2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC). Institute of Electrical and Electronics Engineers Inc., 2015. 7356432.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Thermal processes driving laser-welding for module interconnection
AU - Schulte-Huxel, Henning
AU - Kajari-Schroder, Sarah
AU - Brendel, Rolf
PY - 2015/12/14
Y1 - 2015/12/14
N2 - Laser welding of thin Al layers offers a silver-free and highly flexible option for the interconnection of Al metallized solar cells. Welding requires the melting of the Al layers in order to form a reliable electrical contact. Here, we investigate the process driving the melt front of the Al towards the interface between the two Al layer. In experiments we observe two different mechanisms depending on the thickness of the irradiated layer. In the case of Al layers thinner than 5 μm a melt-through of the Al-layer is observed, whereas for thicker layers thermal expansion causes a breakage of the surface and ejection of molten Al, which enables the contact formation. Using simulations based on finite element method we instigate the mechanisms leading to the different behavior. The simulations match the experimental results with the experimental measurement uncertainty. In case of thin layers, the simulation show that the process is limited by thermal diffusion. For thicker Al layers the onset of melting on the front side initiates the breakage of the surface and the ejection of the aluminum.
AB - Laser welding of thin Al layers offers a silver-free and highly flexible option for the interconnection of Al metallized solar cells. Welding requires the melting of the Al layers in order to form a reliable electrical contact. Here, we investigate the process driving the melt front of the Al towards the interface between the two Al layer. In experiments we observe two different mechanisms depending on the thickness of the irradiated layer. In the case of Al layers thinner than 5 μm a melt-through of the Al-layer is observed, whereas for thicker layers thermal expansion causes a breakage of the surface and ejection of molten Al, which enables the contact formation. Using simulations based on finite element method we instigate the mechanisms leading to the different behavior. The simulations match the experimental results with the experimental measurement uncertainty. In case of thin layers, the simulation show that the process is limited by thermal diffusion. For thicker Al layers the onset of melting on the front side initiates the breakage of the surface and the ejection of the aluminum.
KW - Al metallization
KW - cell interconnection
KW - FEM simulations
KW - Laser processing
KW - module integration
UR - http://www.scopus.com/inward/record.url?scp=84961566745&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2015.7356432
DO - 10.1109/PVSC.2015.7356432
M3 - Conference contribution
AN - SCOPUS:84961566745
BT - 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC)
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Y2 - 14 June 2015 through 19 June 2015
ER -