1. S. R. WENHAM, and M. A. GREEN, US patent No. 4, 726,850 (1988).
2. J. ZHAO, A. WANG, and M. A. GREEN, High efficiency PERL and PERT silicon solar cells on FZ and MCz substrates, Technical Digest of the 11th International Photovoltaic Science and Engineering Conference, Sapparo, Japan, 557(1999).
3. J. ZHAO, A. WANG, and M. A. GREEN, Sol. Energy Mat. Sol. Cells 66 (2001) 27. J. ZHAO, A. WANG, and M. A. GREEN, Sol. Energy Mat. Sol. Cells 66 (2001) 27.
4. R. HEZEL, Sol. Energy Mat. Sol. Cells 74 (2002) 25.
5. T. KRYGOWSKY, A. RCHATGI, and D. RYBY, in Proceeding of the 26th IEEE PVSC (1997), p. 19.