Characteristics of $CU(InGa)Se_2$Thin Film Solar Cells with Deposition Condition of Mo Electrode

몰리브덴 전극의 형성조건에 따른 $CU(InGa)Se_2$ 박막 태양전지의 특성

  • Published : 2001.12.01

Abstract

Molybdenum thin films were deposited on the soda lime glass(SLG) substrates by direct-current planar magnetron sputtering, with a sputtering power density of $4.44W/cm^2$. The working pressure was varied from 0.5 mtorr to 20 mtorr to gain a better understanding of the effect of sputtering pressure on the morphology and microstructure of the Mo film. Thin films of $CU(InGa)Se_2$ (CIGS) were deposited on the Mo-coated glass by three stage co-evaporation process. The highest efficiency device was obtained at the maximum value of the tensive stress. The morphology of Mo-coated films were examined by using scanning electron microscopy The film's microstructure, such as the preferred orientation, the full width at half-maximum(FWHM), and the residual intrinsic stress were examined by X-ray diffraction.

Keywords

References

  1. B. Ghosh, and M. J. Carter, 'A New Contacting Technology to $p-CuInSe_2$ in Conjuction with a Diffusion', 13th E.U. Photovoltaic Solar Energy Conference, pp. 2013-2015, 1995
  2. T. J. Vink, M. A. J. Somers, and J. L. C. Daams, and A. G. Dirks, 'Stress, Strain, and Microstructure of Sputter-Deposited Mo Thin Films', J. Apply. Phys., Vol. 70, pp.4301-4308, 1991 https://doi.org/10.1063/1.349108
  3. M. Itoh, M. Hori, and S. Nadahara, 'The origin of Stress in Sputter-Deposited Tungsten Films for X-ray Masks', J. Vac. Sci. Technol. B9m pp.149-153, 1991
  4. T. Yamaguchi, and R. Miyagawa, 'Effects of Oxygen on the Properties of Sputtered Molybdenum Films', Jpn. J. Appl. Phys., Vol. 30, 9A, pp. 2069-2073,1991 https://doi.org/10.1143/JJAP.30.2069
  5. T. Dullweber, G. Hanna, M. A. Contreras, R. Noufi and H. W. Schock, 'Study of the Effect of Gallium Grading in $Cu(InGa)Se_2$' Thin Solid Films, Vol. 478, pp.361-362, 2000 https://doi.org/10.1016/S0040-6090(99)00845-7
  6. H. Windischmann, 'An Intrinsic Stress Scaling Law for Polycrystalline Thin Films Prepared by Ion Beam Sputtering', J. Appl. Phys., Vol. 62, pp. 1800, 1987 https://doi.org/10.1063/1.339560
  7. J. A. Thornton, 'The Microstructure of Sputter-deposited Coatings', J. Vac. Sci. Technol. A4, pp.3059-3069, 1986
  8. K. Muller, 'Stress and Microstructure of Sputter-deposited Thin Films : Molecular Dynamics Investigation, J. Appl. Phys., Vol. 62, pp. 1796-1799, 1987 https://doi.org/10.1063/1.339559