1. Wde Wild-Scholten, M.J., Cassagne, V., Environmental footprint of photovoltaics, in: Proceedings of the 28th European Photovoltaic Solar Energy Conference, Paris, 2013, presentation 6DO.10.3.
2. Impact of metal contaminations in silicon solar cells;Coletti;Adv. Funct. Mater.,2011
3. Acceptable contamination levels in solar grade silicon: from feedstock to solar cell;Hofstetter;Mater. Sci. Eng. B,2009
4. Geerling, L.J., Manshanden, P., Wyers, G.P., Ovrelid, E.J., Waerners, A.N., Wiersma, B., Specification of solar grade silicon: how common impurities affect the cell efficiency of mc-solar cells, in: Proceedings of the 20th European Photovoltaic Solar Energy Conference, Barcelona, 2005.
5. Research on efficiency limiting defects and defect engineering in silicon solar cells—results of the German research cluster SolarFocus;Riepe;Phys. Status Solidi C,2010