1. cf. 13th NREL Photovoltaic Program Review, Ullal H S and Witt C E 1996 eds., AIP Conf. 353 (AIP, Woodbury)
2. Conf. Rec.25th Photovoltaic Specialists Conference, Washington, May 13–17, 1996 (IEEE, NY, NY), in press.
3. “Polycrystalline Semiconductors III, — Physics and Technology”, H P Strun, J H Werner, B Fortin, O Bonnaud 1994 eds., (Scitech, Switzerland)
4. cf. special issue of Solar Cells, 1986 16
5. Shay J L, Wagner S and Kasper H M 1975Appl. Phys. Lett. 27 p. 89