1. 24·5% Efficiency silicon PERT cells on MCZ substrates and 24·7% efficiency PERL cells on FZ substrates
2. R. Hezel, W. Hoffmann, K. Jaeger, Proceedings of the 10th European Photovoltaic Solar Energy Conference, Lisbon, 1991, pp. 511–514.
3. K. Jaeger-Hezel, W. Schmidt, W. Heit, K.D. Rasch, Proceedings of the 13th European Photovoltaic Solar Energy Conference, Nice, 1995, pp. 1515–1518.
4. M. Alonso, R. Pottbrock, R. Voermans, J.J. Billard,B. Yordi, Proceedings of the 12th European Photovoltaic Solar Energy Conference, Amsterdam, 1994, pp. 1163–1166.
5. R. Hezel, German Patent DE 4143083.0, 1991.