Effect of Second Complexing Agent of N₂H₄ on the Optical and Structural Properties of ZnS Thin Films

Abstract:

ZnS films have been deposited on glass substrates by chemical bath deposition (CBD). The optical and structural properties were analyzed by UV-VIS spectrophotometer and X-ray diffraction (XRD). The results showed that the prepared thin films from the solution using N₂H₄ as second complexing agent were thicker than those from the solution without adding N₂H₄ in; this is due to using second complexing agent of N₂H₄, the deposition mechanisms change which is conductive to heterogeneous deposition. When using N₂H₄ as second complexing agent, the crystallinity of ZnS thin films improved with a significant peak at 2θ=28.96°which can be assigned to the (111) reflection of the sphalerite structure. The transmittances of the prepared films from the solution adding N₂H₄ in as second complexing agent were over 85%, compared to those from the solution without N₂H₄ (over 95%). The band gaps of the ZnS films from the solution using N₂H₄ as second complexing agent were larger (about 4.0eV) than that from those from the solution without N₂H₄ (about 3.98eV), which indicated that the prepared ZnS films from the solution adding N₂H₄ in as second complexing agent were better used as buffer layer of solar cells with adequate optical properties. In short, using N₂H₄ as second complexing agent, can greatly improve the optical and structural properties of the ZnS thin films.

• Periodical: Key Engineering Materials (Volume 591)
• Pages: 297-300
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.591.297
• Online since: November 2013
• Authors: Huan Ke, Shu Wang Duo, Ting Zhi Liu, Hao Zhang, Xiao Yan Fei
• Keywords: CBD, Complexing Agent, Optical Property, Structure, ZnS Films

References

[1] J. A. Ruffner, M. D. Himel, V. Mizrahi, G. I. Stegeman, U. Gibson. J. Appl. Opt. 1989, 28, 5209.

[2] J. Chun, D. S. Talaga, J. I. Zink. J. Am. Chem. Soc. 1997, 119, 163.

[3] R. R. Chamberlin, J. S. Skarman. J. Electrochem. Soc. 1966, 113, 86.

[4] J. M. Dona, J. Herrero. Thin Solid Films. 1995, 5, 268.

[5] T. Nakada, M. Mizutani, Y. Hagiwara, A. Kunioka. Solar Energy Materials & Solar Cells. 2001, 67, 255.

DOI: 10.1016/s0927-0248(00)00289-0

[6] J. Herrero, M. T. Guttierez, C. Guillen, J. M. Dona, M. A. Martinez, A. M. Chaparro and R. Bayon. Thin Solid Films. 2000, 361–362, 28.

[7] N. Naghavi, D. Abou-Ras, N. Allsop, N. Barreau, S. Bücheler, A. Ennaoui, C. H. Fischer, C. Guillen, D. Hariskos, J. Herrero, R. Klenk, K. Kushiya, D. Lincot, R. Menner, T. Nakada, C. Platzer-Bjorkman, S. Spiering, A. N. Tiwari, T. Torndahl. Progress photovoltaics, Res. Appl. 2010, 18(6), 411.

DOI: 10.1002/pip.955

[8] W. Vallejo, C. Quinones, G. Gordillo. Journal of Physics and Chemistry of Solids. 2012, 73, 573.