Optimized stencil print for low Ag paste consumption and high conversion efficiencies

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dc.identifier.uri http://dx.doi.org/10.15488/2010
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2035
dc.contributor.author Hannebauer, Helge
dc.contributor.author Schimanke, S.
dc.contributor.author Falcon, T.
dc.contributor.author Altermatt, Pietro P.
dc.contributor.author Dullweber, Thorsten
dc.date.accessioned 2017-10-10T08:16:58Z
dc.date.available 2017-10-10T08:16:58Z
dc.date.issued 2015
dc.identifier.citation Hannebauer, H.; Schimanke, S.; Falcon, T.; Altermatt, P. P.; Dullweber, T.: Optimized stencil print for low Ag paste consumption and high conversion efficiencies. In: Energy Procedia 67 (2015), S. 108-115. DOI: https://doi.org/10.1016/j.egypro.2015.03.294
dc.description.abstract We evaluate industrial-type PERC solar cells applying a dual printed front grid with stencil printed Ag fingers. We vary the Ag paste consumption for the finger print between 8.4 mg and 120.4 mg per 156 x 156 mm(2) wafer (weighted after printing before drying) by using polyurethane squeegees with different shore hardness as well as a metal squeegee and by varying the printing pressure to obtain different finger heights. The busbar consumes additional 19.5 mg Ag paste. We obtain average finger heights from 5.9 mu m up to 24.3 mu m for 55 mu m to 65 mu m wide fingers. The resulting PERC solar cells show an average efficiency of 20.2% for finger paste consumptions above 60 mg. In contrast, a strong reduction of the conversion efficiency with less than 60 mg finger paste consumption is observed since the increased series resistance reduces the FF. By analytical modelling, we compare the calculated series resistance to the experimental data and observe a good accordance for more than 40 mg finger paste consumption whereas the experimental series resistance slightly exceed the modelled values below 40 mg. In addition, we use numerical simulations to investigate the series resistance dependence on the finger height which shows higher experimental values for finger height below 10 mu m. The deviation of the measured series resistance and the two modelled cases is mostly due to inhomogeneous distribution of finger height profiles and finger interruptions on the solar cells with front finger paste consumption of less than 40 mg. For finger paste consumption below 60 mg, we find that also the specific contact resistance increases. A physical model of the root cause for this dependence still has to be found. eng
dc.language.iso eng
dc.publisher Amsterdam : Elsevier Science BV
dc.relation.ispartof 5th Workshop on Metallization for Crystalline Silicon Solar Cells, October 20-21, 2014, ISC Konstanz, Constance, Germany
dc.relation.ispartofseries Energy Procedia 67 (2015)
dc.rights CC BY-NC-ND 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject silicon solar cell eng
dc.subject screen-printing eng
dc.subject metallization eng
dc.subject dual print eng
dc.subject perc eng
dc.subject paste consumption eng
dc.subject.ddc 333,7 | Natürliche Ressourcen, Energie und Umwelt ger
dc.title Optimized stencil print for low Ag paste consumption and high conversion efficiencies
dc.type article
dc.type conferenceObject
dc.type Text
dc.relation.issn 1876-6102
dc.relation.doi https://doi.org/10.1016/j.egypro.2015.03.294
dc.bibliographicCitation.volume 67
dc.bibliographicCitation.firstPage 108
dc.bibliographicCitation.lastPage 115
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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