[1] [1] T. Saga, NPG Asia Mater. 2, 96 (2010).

[2] [2] J. Zhao and M. A. Green, IEEE Trans. Electr. Dev. 38, 1925 (1991).

[3] [3] W. Wang and H. Hao, Chin. Opt. Lett. 8, 35 (2010).

[4] [4] C. Martinet, V. Paillard, A. Gagnaire, and J. Joseph, J. Non-Cryst. Solids 216, 77 (1997).

[5] [5] S. E. Lee, S. W. Choi, and J. Yi, Thin Solid Films 276, 208 (2000).

[6] [6] J. Dupuis, J.-F. Lelievre. E. Fourmond, V. Mong-The Yen, O. Nichiporuk, N. Le Quang, and M. Lemiti, in Proceedings of 24th EUPVSEC 1636 (2009).

[7] [7] M. Lipinki, A. Kaminski, J.-F. Lelievre, M. Lemiti, E. Fourmond, and P. Ziea, Phys. Stat. Sol. (c) 4, 1566 (2007).

[8] [8] B. Hoex, S. B. S. Heil, E. Langereis, M. C. M. van de Sanden, and W. M. M. Kessels, Appl. Phys. Lett. 89, 042112 (2006).

[9] [9] G. Dingemans, R. Seguin, P. Engelhart M. C. M. van de Sanden, and W. M. M. Kessels, Phys. Status Solidi-RRL 4, 10 (2010).

[10] [10] E. Schneiderlochner, R. Preu, R. Ludemann, and S. W. Glunz, Progress in Photovoltaics 10, 29 (2002).