Conceptual comparison between standard Si solar cells and back contacted cells

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Ali, A.; Ohrdes, T.; Wagner, H.; Altermatt, P.P.: Conceptual comparison between standard Si solar cells and back contacted cells. In: Energy Procedia 55 (2014), S. 11-16. DOI: https://doi.org/10.1016/j.egypro.2014.08.003

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Sum total of downloads: 69




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Abstract: 
It is often stated that one of the main advantages of back-contacted (BC) Si solar cells over standard cells is that shading due to the front-finger metallization is avoided - while it is also often stated that BC cells are prone to "electronic shadowing", which means that the carrier collection efficiency in front of the back-surface-field (BSF) may be reduced. We compare these two cell concepts in two ways: by means of an extensive collection of measured IV data from literature, and by interpreting as well as quantifying the differences with the aid of numerical device simulation. Both literature data and simulations indicate that BC cells have a Jsc-advantage of maximally about 1 mA/cm2, but in Voc and FF there is no clear advantage or disadvantage over standard cells. With a parameter study, we reveal the main design advantages and weaknesses in each cell type. Our numerical device modeling indicates that one of the most crucial design advantages of BC over standard cells is that the collection of minority carriers in the emitter is rather unimportant, which leaves greater flexibility in emitter design than in standard cells.
License of this version: CC BY-NC-ND 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 60 86.96%
2 image of flag of Russian Federation Russian Federation 3 4.35%
3 image of flag of United States United States 2 2.90%
4 image of flag of United Kingdom United Kingdom 2 2.90%
5 image of flag of France France 1 1.45%
6 image of flag of Czech Republic Czech Republic 1 1.45%

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