Device architecture and lifetime requirements for high efficiency multicrystalline silicon solar cells

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Wagner, Hannes; Hofstetter, Jasmin; Mitchell, Bernhard; Altermatt, Pietro P.; Buonassisi, Tonio: Device architecture and lifetime requirements for high efficiency multicrystalline silicon solar cells. In: Energy Procedia 77 (2015), S. 225-230. DOI:

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Sum total of downloads: 117

We present a numerical simulation study of different multicrystalline silicon materials and solar cell architectures to understand today's efficiency limitations and future efficiency possibilities. We compare conventional full-area BSF and PERC solar cells to future cell designs with a gallium phosphide heteroemitter. For all designs, mc-Si materials with different excess carrier lifetime distributions are used as simulation input parameters to capture a broad range of materials. The results show that conventional solar cell designs are sufficient for generalized mean lifetimes between 40 90 mu s, but do not give a clear advantage in terms of efficiency for higher mean lifetime mc-Si material because they are often limited by recombination in the phosphorus diffused emitter region. Heteroemitter designs instead increase in cell efficiency considerable up to generalized mean lifetimes of 380 mu s because they are significantly less limited by recombination in the emitter and the bulk lifetime becomes more important. In conclusion, to benefit from increasing mc-Si lifetime, new cell designs, especially heteroemitter, are desirable.
License of this version: CC BY-NC-ND 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2015
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 75 64.10%
2 image of flag of United States United States 15 12.82%
3 image of flag of China China 11 9.40%
4 image of flag of No geo information available No geo information available 2 1.71%
5 image of flag of Poland Poland 2 1.71%
6 image of flag of India India 2 1.71%
7 image of flag of Ukraine Ukraine 1 0.85%
8 image of flag of Taiwan Taiwan 1 0.85%
9 image of flag of Malaysia Malaysia 1 0.85%
10 image of flag of Kazakhstan Kazakhstan 1 0.85%
    other countries 6 5.13%

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