Simulation-based roadmap for the integration of poly-silicon on oxide contacts into screen-printed crystalline silicon solar cells

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Kruse, C.N.; Schäfer, S.; Haase, F.; Mertens, V.; Schulte-Huxel, H. et al.: Simulation-based roadmap for the integration of poly-silicon on oxide contacts into screen-printed crystalline silicon solar cells. In: Scientific Reports 11 (2021), Nr. 1, 996. DOI:

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Sum total of downloads: 137

We present a simulation-based study for identifying promising cell structures, which integrate poly-Si on oxide junctions into industrial crystalline silicon solar cells. The simulations use best-case measured input parameters to determine efficiency potentials. We also discuss the main challenges of industrially processing these structures. We find that structures based on p-type wafers in which the phosphorus diffusion is replaced by an n-type poly-Si on oxide junction (POLO) in combination with the conventional screen-printed and fired Al contacts show a high efficiency potential. The efficiency gains in comparsion to the 23.7% efficiency simulated for the PERC reference case are 1.0% for the POLO BJ (back junction) structure and 1.8% for the POLO IBC (interdigitated back contact) structure. The POLO BJ and the POLO IBC cells can be processed with lean process flows, which are built on major steps of the PERC process such as the screen-printed Al contacts and the Al2O3/SiN passivation. Cell concepts with contacts using poly-Si for both polarities (POLO 2-concepts) show an even higher efficiency gain potential of 1.3% for a POLO 2 BJ cell and 2.2% for a POLO 2 IBC cell in comparison to PERC. For these structures further research on poly-Si structuring and screen-printing on p-type poly-Si is necessary. © 2021, The Author(s).
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2021
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 38 27.74%
2 image of flag of United States United States 33 24.09%
3 image of flag of China China 28 20.44%
4 image of flag of No geo information available No geo information available 7 5.11%
5 image of flag of Greece Greece 7 5.11%
6 image of flag of Latvia Latvia 6 4.38%
7 image of flag of Vietnam Vietnam 4 2.92%
8 image of flag of India India 2 1.46%
9 image of flag of Australia Australia 2 1.46%
10 image of flag of Austria Austria 1 0.73%
    other countries 9 6.57%

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