Zinc Sulfide Buffer Layer for CIGS Solar Cells Prepared by Chemical Bath Deposition

  • Rui-Wei You
  • Yen-Pei Fu
Keywords: ZnS, buffer layer, chemical bath deposition, thin film solar cells, optical property

Abstract

In this study, ZnS thin films were successfully synthesized by chemical bath deposition (CBD) with starting materials of NH2-NH2, SC(NH2)2, and ZnSO4‧7H2O. ZnS thin films were deposited with different time on glass substrates by CBD at 80oC and pH=9. Based on X-ray diffraction (XRD) patterns, it is found that the ZnS thin films exhibit cubic polycrystalline phase. It was found that the optimum deposition time is 90 min for preparing ZnS thin film that is suitable as buffer layer for CuIn1-xGaxSe2 solar cells. The thin film deposited for 90 min has high transmittance up to 80% in the spectra range from 350 nm to 800 nm, and the optical band gap is about 3.59 eV.

References

A. Wei, J. Liu, M. Zhuang, and Y. Zhao, “Preparation and characterization of ZnS thin films prepared by chemical bath deposition,” Materials Science in Semiconductor Processing, vol. 16, pp. 1478-1484, December 2013.

B. G. Streetman and S. K. Banerjee, “Solid state electron devices,” 6th edition, Pearson Prentice Hall, New Jersey, pp. 158-208, 2006.

I. Repins, M. A. Contreras, B. Egaas, C. DeHart, J. Scharf, C. L. Perkins, B. To, and R. Noufi, “Accelerated publication 19.9%- efficient ZnO/CdS/CuInGaSe2 solar cell with 81.2% fill factor,” Progress in Photovoltaics: Research and Applications 16, pp. 235, 2008.

R. N. Bhattacharya and K. Ramanathan, “Cu (In,Ga)Se2 thin film solar cells with buffer layer alternative to CdS,” Solar Energy, vol. 77, pp. 679-683, 2004.

J. Liu, A. Wei, and Y. Zhao, “Effect of different complexing agents on the properties of chemical-bath-deposited ZnS thin films,” J. Alloys Compd., vol. 588, pp. 228-234, 2014.

I. O. Oladeji and L. Chow, “Synthesis and processing of CdS/ZnS multilayer films for solar cell application,” Thin Solid Films, vol. 474, pp. 77-83, 2005.

F. Göde, C. Umus, and M. Zor, “Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method,” J. Cryst. Growth, vol. 299, pp. 136-141, 2007.

S. W. Shin, S. R. Kang, K. V. Gurav, J. H. Yun, J. H. Moon, J. Y. Lee, and J. H. Kim, “A study on the improved growth rate and morphology of chemically deposited ZnS thin film buffer layer for thin film solar cells in acidic medium,” Solar Energy, vol. 85, pp. 2903-2911, 2011.

S. W. Shin, G. L. Agawane, M. G. Gang, A. V. Moholkar, J. H. Moon, J. H. Kim, and J. Y. Lee, “Preparation and characteristics of chemical bath deposited ZnS thin films: Effects of different complexing agents,” J. Alloys Compd., vol. 526, pp. 25-30, 2012.

R. N. Bhattacharya, K. Ramanathan, L. Gedvilas, and B. Keyes “Cu(In,Ga)Se2 thin-film solar cells with ZnS(O,OH), Zn–Cd–S(O,OH), and CdS buffer layers,” J. Phys. Chem. Solids, vol. 66, pp. 1862-1864, 2005.

Published
2016-11-18
How to Cite
[1]
R.-W. You and Y.-P. Fu, “Zinc Sulfide Buffer Layer for CIGS Solar Cells Prepared by Chemical Bath Deposition”, AITI, vol. 2, no. 3, pp. 95-98, Nov. 2016.
Section
Articles