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Influence of Sputter Power on the Structural and Optical Properties of CdS Films for Photovoltaic Applications

태양전지용 CdS 박막의 구조적, 광학적 물성에 미치는 스퍼터 전력 효과

  • Published : 2006.04.01

Abstract

CdS films have been prepared on polycarbonate, polyethylene terephthalate, and Coming 7059 substrates by r.f magnetron sputtering technique at room temperature. A comparison of the properties of the films deposited on polymer and glass substrates was performed. In addition, the influence of the sputter power on the structural and optical properties of these films was evaluated. The XRD measurements revealed that CdS films were polycrystalline and retained the mixed structure of hexagonal wurtzite and cubic phase, regardless of substrate types. As the sputter power was increased from 75 to 150 Watt, the structure of CdS films was converted from the mixed of hexagonal and cubic phase to hexagonal phase. The morphology of CdS films is found to be continuous and dense. Also, the grain of CdS films is larger with increasing the sputter power. The average transmittance exceeded 80 % in the visible spectrum for all films and decreases slightly with the sputter power.

Keywords

References

  1. X. Wu, 'High-efficiency polycrystalline CdTe thin-film solar cells', Solar Energy, Vol. 77, p, 803, 2004 https://doi.org/10.1016/j.solener.2004.06.006
  2. K. Ramanathan, M. Contreras, C. Perkins, S. Asher, F. Hasoon, J. Keane, D. Young, M. Romero, W. Metzger, R. Noufi, J. Ward, and A. Duda, 'Properties of 19.2 % efficiency ZnO/CdS/CulnGa$Se_2$ thin-film solar cells', Prog. Photovolt., Res. Appl., Vol. 11, p. 225, 2003 https://doi.org/10.1002/pip.494
  3. A. D. Compaan, A. Gupta, S. Lee, S. Wang, and J. Drayton, 'High efficiency, magnetron sputtered CdS/CdTe solar cells', Solar Energy, Vol. 77, p. 815, 2004 https://doi.org/10.1016/j.solener.2004.06.013
  4. X. Mathew, G. W. Thompson, V. P. Singh, J. C. McClure, S. Velumani, N. R. Mathews, and P. J. Sebastian, 'Development of CdTe thin films on flexible substrates a review', Solar Energy Mater. Solar Cells, Vol. 76, p. 293, 2003 https://doi.org/10.1016/S0927-0248(02)00281-7
  5. A. N. Tiwari, A. Romeo, D. Baetzner, and H. Zogg, 'Flexible CdTe solar cells on polymer films', prog. Photovolt. Res. Appl., Vol. 9, p. 211, 2001
  6. A. Romeo, G. Khrypunov, F. Kurdesau, D. L. Batzner, H. Zogg, and A. N. Tiwari, 'High Efficiency Flexible CdTe Solar Cells on Polymer Substrates', Technical Digest of the International PVSEC-14, Bangkok, Thailand, p. 715, 2004
  7. B. M. Basal, V. K. Kapur, C. R. Leidholm, A. Halani, and K. Gledhill, 'Flexible and light weight copper indium diselenide solar cells on polyimide substrates', Solar Energy Mater. Solar Cells, Vol. 43, p. 93, 1996
  8. A. N. Tiwari, M. Krejci, F.- J Haug, and H. Zogg, '12.8 % efficiency Cu(ln.Ga)$Se_2$ solar cell on a flexible polymer sheet', Prog, Photovoltaics: Res. Appl., Vol. 7, p. 393, 1999 https://doi.org/10.1002/(SICI)1099-159X(199909/10)7:5<393::AID-PIP289>3.0.CO;2-4
  9. V. K. Kapur, A. Bansal, P. Le, and O. I. Asensio, 'Non-vacuum processing of $CuIn_{1-x} Ga_xSe_2$ solar cells on rigid and flexible substrates using nanoparticle precursor inks', Thin Solid Films, Vol. 431/432, p. 53, 2003 https://doi.org/10.1016/S0040-6090(03)00253-0
  10. T. L. Chu, Shirley S. Chu, N. Schultz, C. Wang, and C. Q. Wu, 'Solution-grown cadmium sulfide films for photovoltaic devices', J. Electrochem. Soc., Vol. 139, No. 9, p. 2443, 1992 https://doi.org/10.1149/1.2221246
  11. R. Ramirez-Bonn, N. C. Sandoval-Inda, F. J Espinosa-Beltran, M. Sotelo-Lerma, O. Zelaya-Angel, and C. Falcony, 'Structural transition of chemically deposited CdS films on thermal annealing', J. Phys.: Condens. Matter, Vol. 9, p. 10051, 1997 https://doi.org/10.1088/0953-8984/9/45/031
  12. O. Zelaya- Angel, J. J Alvarado-Gil, R. Lozada-Morales, H. Vargas, and A. Ferreira da Silva, 'Band-gap shift in CdS semiconductor by photoacoustic spectroscopy: Evidence of a cubic to hexagonal lattice transition', Appl. Phys. Lett., Vol. 64, p. 291, 1994 https://doi.org/10.1063/1.111184
  13. M. Ichimura, A. Usarni, T. Wada, M. Funato, K. Ichino, Sz. Fujita, and Sg. Fujita, 'Raman spectra of cubic $Zn_{1-x}Cd_xS$', Phys. Rev., Vol. 46, p. 4273, 1992 https://doi.org/10.1103/PhysRevB.46.4273
  14. 이재형, D. Mangalaraj, 이준신, 'CdS 박막의 구조적 및 광학적 물성에 미치는 아르곤 및 질소 이온 주입 효과', 한국전기전자재료학회논문지, 15권, 6호, p. 471, 2002
  15. B. Ray, II-VI Compounds, Pergamon Press, Oxford, p, 205, 1969

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  1. Electrical and Optical Properties of CdS Thin Film with Different Substrate Temperatures vol.22, pp.9, 2009, https://doi.org/10.4313/JKEM.2009.22.9.792