Photoelectronic Properties of a-Si:Sex and a-Si:Tex Thermally Evaporated Films

Abstract

The presence of selenium (Se) or Telurium (Te) in amorphous silicon films seems to improve the quality of these films by reducing the number of unsatisfied or dangling bonds and changing the optical gap and thermal activation energy. The thermal activation energies of a-Si:Sex and a-Si:Tex were always larger than that of a-Si films. The measured optical gap can be tailored to some value between 0.8 eV and 1.8 eV depending on the use of Se or Te and on the relative concentrations. The presence of Se or Te in a-Si films seems to have the same effect as that of hydrogen in a-Si films prepared by glow discharge of silane and used in solar cells.

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References

  1. 1.

    R. Zallen, R. E. Drew, R.L. Emerald, and M.L. Slade, Phys. Rev. Lett. 26, 1564 (1971).

    CAS  Article  Google Scholar 

  2. 2.

    M. Kastner, D. Adler, and H. Fritzsche, Phys. Rev. Lett. 37, 1504 (1976).

    CAS  Article  Google Scholar 

  3. 3.

    H. Fritzsche, Solar Energy Mater. 3, 447 (1980).

    CAS  Article  Google Scholar 

  4. 4.

    R. C. Chittick, J.H. Alexander, and H.F. Sterling, J. Electrochem. Soc. 116, 77 (1969).

    CAS  Article  Google Scholar 

  5. 5.

    F.G. Wakim, S.A. Abo-Namous, A. Al-Jassar, and M.A. Hasan, Appl. Phys. Lett. 42, 523 (1983).

    CAS  Article  Google Scholar 

  6. 6.

    F.G. Wakim, A. Al-Jassar, and S.A. Abo-Namous, J. Non-Crystalline Solids 53, 11 (1982).

    CAS  Article  Google Scholar 

  7. 7.

    F.A. Faris, A. Al-Jassar, G.G. Wakim and K.Z. Botros, Proc. of Mat. Res. Soc., San Francisco, April 15 (1985).

  8. 8.

    J.G. Edwards, H.F. Franklin and E.A. Beauchamp, J. Inorg. Nucl. Chem. 30, 3112 (1968).

    Article  Google Scholar 

  9. 9.

    N. Kondratiev; Bond Dissociation Energies, Ionization Potentials, and Electron Affinities, Mank Publishing House, Moscow (1974).

    Google Scholar 

  10. 10a.

    K.P. Huber and G. Herzberg, Molecular Spectra and Molecular Structure Constants of Diatomic Molecules, Nostrand, NY (1979).

    Google Scholar 

  11. 10b.

    CRC Handbook of Chemistry and Physics, Robert C. Weast, Ed. CRC Press Inc., Baca Raton, Fla., 66th Ed. (1986).

    Google Scholar 

  12. 11.

    E.G. Rochow, in Comprehensive in Inorganic Chemistry, Ed. J.C. Bailor, H.J. Emeleus, Sir R. Nyholm, and A.F. Trotmann Dickenson, Pergamon Press Oxford 1414, (1973).

    Google Scholar 

  13. 12a.

    G. Miller and S, Kalbitzer, 7th Int. Conf. on Amorphous and liquid Semiconductors, Ed. W. E. Spear, 347 (1977).

  14. 12b.

    W. Beyer, H. Mell and H. Overhof, 7th. Int. Conf. of Amorphous and Liquid Semiconductors, Ed. W. E. Spear, 328 (1977).

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Correspondence to F. G. Wakim.

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Wakim, F.G. Photoelectronic Properties of a-Si:Sex and a-Si:Tex Thermally Evaporated Films. MRS Online Proceedings Library 70, 343–347 (1986). https://doi.org/10.1557/PROC-70-343

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