Cracks in solar cell metallization leading to module power loss under mechanical loads

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dc.identifier.uri Kasewieter, Jörg Haase, Felix Larrodé, Marta Haro Köntges, Marc 2019-03-06T09:34:01Z 2019-03-06T09:34:01Z 2014
dc.identifier.citation Kasewieter, J.; Haase, F.; Larrodé, M.H.; Köntges, M.: Cracks in solar cell metallization leading to module power loss under mechanical loads. In: Energy Procedia 55 (2014), S. 469-477. DOI:
dc.description.abstract We investigate the mechanisms leading to electrically insulated cell parts in a photovoltaic module under mechanical load. For this we measure the resistances across a crack in a laminated solar cell during bending that is typical in the field. The cracks in the solar cell are detected with electroluminescence imaging. The resistance over the aluminum paste increases continuously by negligible 30 mΩwhereas the front finger resistance increases by 15.4 kΩstepwise. This difference is the result of the higher ductility of the aluminum paste in comparison to the front finger metallization. We associate the steps in the front finger resistance measurement to breakage of single fingers with an equivalent circuit model. Furthermore we found that a silicon crack widths lower 2 μm has no influence on the resistances. Crack widths higher than 7 μm leads to a complete front finger interruption. We determine that the specific resistance of such a crack causes nearly 100% of the power loss, which is caused by a completely electrically insulating crack in a photovoltaic module. eng
dc.language.iso eng
dc.publisher London : Elsevier Ltd.
dc.relation.ispartofseries Energy Procedia 55 (2014)
dc.rights CC BY-NC-ND 3.0 Unported
dc.subject Crack width eng
dc.subject Mechanical loads eng
dc.subject Metallization eng
dc.subject Power loss eng
dc.subject.classification Konferenzschrift ger
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Cracks in solar cell metallization leading to module power loss under mechanical loads
dc.type Article
dc.type Text
dc.relation.issn 1876-6102
dc.bibliographicCitation.volume 55
dc.bibliographicCitation.firstPage 469
dc.bibliographicCitation.lastPage 477
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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    Frei zugängliche Publikationen aus An-Instituten der Leibniz Universität Hannover

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