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A. Derbouz Draoua, B. Martel, S. Dubois, C. Audoin, M. Serasset, A. Fauveau, H. Radhakrishnan, J. Denafas, L. Petreniene, N. Severino, N. Bednar, A. Ulyashin, M. Syvertsen:
"On the Fabrication of Solar Cells Based on Newly Produced Recycled Silicon Feedstocks From CABRISS - A Comparative Study Between Material Properties and Solar Cell Performances";
Talk: 33rd European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC), Amsterdam; 09-25-2017 - 09-29-2017; in: "EU PVSEC 2017 - 33rd European Photovoltaic Solar Energy Conference and Exhibition", (2017), ISSN: 2196-0992; 483 - 487.

Second life silicon solar cells based on 100% recycled silicon have been recently produced at CEA-INES
in the frame of the CABRISS Project. A maximum efficiency of 18.1% has been reached (Al-BSF solar cells), with
Mono-like silicon substrate grown from recycled feedstock. During this first period of the project, several Silicon ingots
were produced using different conventional methods: Multi-Si standard casting method, Standard Cz-Si pulling and
also mono-Si seed-assisted casting method (Mono-like technology). To assess the photovoltaic potential of recycled
materials, we developed an overall material qualification protocol to evaluate the effect of the different solar cell
processing steps on the material quality. This study shows that all solar cells performances are in good agreement with
the data extracted from this protocol, especially with the bulk carrier lifetime determined after each technological step.
In addition this study brings new insights into the compatibility between novel Recycled Silicon feedstocks (Re-Si) and
the fabrication of standard solar cells. This is definitely an important step to improve the definition of the future Re-Si
feedstocks specifications and enhance the development of efficient recycling processes.

Second life silicon solar cells based on 100% recycled silicon have been recently produced at CEA-INES
in the frame of the CABRISS Project. A maximum efficiency of 18.1% has been reached (Al-BSF solar cells), with
Mono-like silicon substrate grown from recycled feedstock. During this first period of the project, several Silicon ingots
were produced using different conventional methods: Multi-Si standard casting method, Standard Cz-Si pulling and
also mono-Si seed-assisted casting method (Mono-like technology). To assess the photovoltaic potential of recycled
materials, we developed an overall material qualification protocol to evaluate the effect of the different solar cell
processing steps on the material quality. This study shows that all solar cells performances are in good agreement with
the data extracted from this protocol, especially with the bulk carrier lifetime determined after each technological step.
In addition this study brings new insights into the compatibility between novel Recycled Silicon feedstocks (Re-Si) and
the fabrication of standard solar cells. This is definitely an important step to improve the definition of the future Re-Si
feedstocks specifications and enhance the development of efficient recycling processes.

http://dx.doi.org/10.4229/EUPVSEC20172017-2AV.1.3