1. Solar cells: past, present, future;Götzberger;Sol. Energy Mater. Sol. Cells,2002
2. Der TRIGA forschungsreaktor mainz;Hampel;Atw Int. Z. Kernenergie,2006
3. Hampel, J., Schmich, E., Boldt, F.M., Wiehl, N., Hampel, G., Kratz, J.V., Reber, S., 2009. Gettering of metallurgical grade silicon by HCl gas. In: Proceedings of the 24th European Photovoltaic Solar Energy Conference, Hamburg, Germany, pp. 2557–2559.
4. Hampel, J., Boldt, F.M., Wiehl, N., Hampel, G., Kratz, J.V., Reber, S., 2010. Use of HCl gas gettering in the epitaxial wafer equivalent concept. In: Proceedings of the 25th European Photovoltaic Solar Energy Conference, Valencia, Spain, pp. 3591–3593.
5. Acceptable contamination levels in solar grade silicon: from feedstock to solar cell;Hofstetter;Mater. Sci. Eng. B,2009