1. R.H. Bube and K.W. Mitchell,J. Electron. Mater. 22, 17 (1993).
2. P.V. Meyers,Solar Cells 24, 35 (1988).
3. R.W. Birkmire, B.E. McCandless and J.E. Phillips,Proc. Polycrst. Thin Film Program Review Meeting, (Lakewood, CO: SERI, 1989), p. 77.
4. T.L. Chu, S.S. Chu and S.T. Ang,J. Appl. Phys. 64, 1233 (1988).
5. N. Suyama, T. Arita, Y. Nishiyama, N. Ueno, S. Kitamura and M. Murozono,Proc. 21st IEEE Photovolt. Spec. Conf. (New York: IEEE, 1990), p. 498.