Investigations on the influence of a forming gas anneal on the mechanical properties of the printed Ag Thick Film front side contact of solar cells after cofiring

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2007
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Schubert, Gunnar
Horzel, Jörg
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The compiled state-of-the-art of PV solar technology and deployment : 22nd European Photovoltaic Solar Energy Conference, EU PVSEC ; proceedings of the international conference, held in Milan, Italy, 3 - 7 September 2007. Munich: WIP-Renewable Energies, 2007, pp. 1573-1577
Zusammenfassung

The beneficial effect of a forming gas anneal (FGA) in hydrogen atmosphere on the fill factor (FF) of screen printed solar cells has been shown previously [1, 2]. In this contribution the effect of a FGA on the mechanical properties of the silver printed front side contact of solar cells is investigated for most relevant wafer surfaces (mc, Cz, EFG, each flat as well as textured). In particular, the adhesion of the busbar to the surface of the silicon wafer is examined by using standardized pull test conditions after soldering pre-soldered Cu-ribbons onto the busbars of the solar cells. It was found that the FGA has no significant influence on the mechanical properties of the busbars including the adhesion strength. Samples which experienced higher than optimal firing conditions show slightly higher adhesion strength and a wider distribution of the forces needed to detach the busbar.

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Fachgebiet (DDC)
530 Physik
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annealing, contact, manufacturing and processing, adhesion, solder, interconnect
Konferenz
EU PVSEC, 3. Sep. 2007 - 7. Sep. 2007, Milan, Italy
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undefined / . - undefined, undefined
Zitieren
ISO 690OHL, Sybille, Gunnar SCHUBERT, Jörg HORZEL, Giso HAHN, 2007. Investigations on the influence of a forming gas anneal on the mechanical properties of the printed Ag Thick Film front side contact of solar cells after cofiring. EU PVSEC. Milan, Italy, 3. Sep. 2007 - 7. Sep. 2007. In: The compiled state-of-the-art of PV solar technology and deployment : 22nd European Photovoltaic Solar Energy Conference, EU PVSEC ; proceedings of the international conference, held in Milan, Italy, 3 - 7 September 2007. Munich: WIP-Renewable Energies, 2007, pp. 1573-1577
BibTex
@inproceedings{Ohl2007Inves-953,
  year={2007},
  title={Investigations on the influence of a forming gas anneal on the mechanical properties of the printed Ag Thick Film front side contact of solar cells after cofiring},
  publisher={WIP-Renewable Energies},
  address={Munich},
  booktitle={The compiled state-of-the-art of PV solar technology and deployment : 22nd European Photovoltaic Solar Energy Conference, EU PVSEC ; proceedings of the international conference, held in Milan, Italy, 3 - 7 September 2007},
  pages={1573--1577},
  author={Ohl, Sybille and Schubert, Gunnar and Horzel, Jörg and Hahn, Giso}
}
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