[3] Pope M, Kallmann H P, Magnante P. J. Chem. Phys., 1963, 38: 2042.
[4] Vincett P S, Barlow W A, Hanm R A, et al. Thin Solid Films, 1982, 94: 171.
[5] Liu T H, Shen W J, Yeo C K, et al. Synthetic Metals, 2003, (137): 1033.
[6] Qiu C f, Chen H Y, Wong M, et al. IEEE, 2001, 48(9): 2131.
[8] Bulovic V, Khalfin V B, Gu G, et al. Phys. Rev. B, 1998, 58(7): 3730.
[9] Tang C W, VanSlyke S A, Chen C H. J. Appl. Phys., 1989, 65: 3610.