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High-field recombination electroluminescence in vacuum-deposited anthracene and doped anthracene films

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Abstract

The electroluminescence (EL) study of anthracene and tetracene-doped anthracene films deposited by a vacuum evaporation onto a substrate at temperatureT 0=−60 °C is reported. Such films show high resistence to electrical breakdown so that their EL behaviour at high electric fields up to above 106 V/cm could be investigated. The high-field EL is interpreted in terms of electron-hole recombination mechanisms with creation of emitting singlet excitons; the electron and hole concentration being limited by injection at metal contacts and by field-independent carrier velocities. The theoretical expression for current density follows the experimental data for fields above 4×105 V/cm at room temperature and the EL intensity is predicted to be a power function of the measured current. It is suggested that in pure anthracene layers the power is determined by the contact injection conditions, i.e. by barrier heights and the effective masses of holes and electrons. In the doped films a guest molecules-induced energy trap distribution leads to a decrease of the power as confirmed by the experimental plots of the host EL intensity versus current density.

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References

  1. 1.

    J.I. Pankove (ed.):Electroluminescence, Topics Appl. Phys.17 (Springer, Berlin, Heidelberg, New York 1977)

  2. 2.

    J.I. Pankove (ed.):Display Devices, Topics Appl. Phys.40 (Springer, Berlin, Heidelberg, New York 1980)

  3. 3.

    I.K. Werestchagin:Electroluminescence of Crystals (Nauka, Moscow 1974) (in Russian)

  4. 4.

    J. Dresner: RCA Rev.30, 322 (1969)

  5. 5.

    D.F. Williams, M. Schadt: Proc. IEEE58, 476 (1970)

  6. 6.

    J. Dresner, A.M. Goodman: Proc. IEEE58, 1868 (1970)

  7. 7.

    J. Gu, M. Kawabe, K. Masuda, S. Namba: J. Appl. Phys.48, 2493 (1977)

  8. 8.

    P.S. Vincett, W.A. Barlow, R.A. Hann, G.G. Roberts: Thin Solid Films94, 171 (1982)

  9. 9.

    J. Kalinowski, J. Godlewski, R. Signerski: Appl. Phys. A31, 215 (1983)

  10. 10.

    K.C. Kao, W. Hwang:Electrical Transport in Solids with Particular Reference to Organic Semiconductors (Pergamon Press, Oxford 1981)

  11. 11.

    G. Vaubel: Phys. Stat. Solidi35, K67 (1969)

  12. 12.

    D.F. Williams, M. Schadt: J. Chem. Phys.53, 3480 (1970)

  13. 13.

    H. Hwang, K.C. Kao: J. Chem. Phys.58, 3521 (1973)

  14. 14.

    L.L.T. Bradley, H.P. Schwob, D. Weitz, D.F. Williams: Mol. Cryst. Liq. Cryst.23, 271 (1973)

  15. 15.

    J. Sworakowski, J.M. Thomas, D.F. Williams, J.O. Williams: J. Chem. Soc. Faraday Trans. II70, 676 (1974)

  16. 16.

    J. Kalinowski, J. Godlewski: Chem. Phys. Lett.36, 345 (1975)

  17. 17.

    J. Gonzalez-Basurto, Z. Burshtein: Mol. Cryst. Liq. Cryst.31, 211 (1975)

  18. 18.

    J. Kalinowski, J. Godlewski, R. Signerski: Mol. Cryst. Liq. Cryst.33, 247 (1976)

  19. 19.

    J. Kalinowski, J. Godlewski, J. Gliński: J. Lumin.17, 467 (1978)

  20. 20.

    J. Gliński, J. Godlewski, J. Kalinowski: Mol. Cryst. Liq. Cryst.48, 1 (1978)

  21. 21.

    J. Gliński, J. Kalinowski: Mat. Sci.7, 157 (1981)

  22. 22.

    J. Kalinowski: Mat. Sci.7, 43 (1981)

  23. 23.

    M. Pope, H.P. Kallmann, P. Magnante: J. Chem. Phys.38, 2042 (1963)

  24. 24.

    W. Helfrich, W.G. Schneider: Phys. Rev. Lett.14, 229 (1965)

  25. 25.

    M. Sano, M. Pope, H. Kallmann: J. Chem. Phys.43, 2920 (1965)

  26. 26.

    I. Zschokke-Gränacher, H.P. Schwob, E. Baldinger: Solid State Commun.5, 825 (1967)

  27. 27.

    F. Lohmann, W. Mehl: J. Chem. Phys.50, 500 (1969)

  28. 28.

    D.F. Williams, M. Schadt: J. Chem. Phys.53, 3480 (1970)

  29. 29.

    H.P. Schwob, I. Zschokke-Gränacher: Mol. Cryst. Liq. Cryst.13, 115 (1971)

  30. 30.

    G. Sommer: Dipl. Thesis, Stuttgart University (1974) private information by N. Karl

  31. 31.

    W. Helfrich, W.G. Schneider: J. Chem. Phys.44, 2902 (1966)

  32. 32.

    H.P. Schwob, D.F. Williams:Chem.Phys.Lett.13, 581 (1972)

  33. 33.

    H.P. Schwob, D.F. Williams: J. Chem. Phys.58, 1542 (1973)

  34. 34.

    M. Wittmer, I. Zschokke-Gränacher: J. Chem. Phys.63, 4187 (1975)

  35. 35.

    W. Helfrich: InPhysics and Chemistry of the Organic Solid State, Vol. 3, ed. by D. Fox, M.M. Labes, A. Weissberger (Wiley, New York 1967) p. 1

  36. 36.

    P.S. Vincett, W.A. Barlow, G.G. Roberts: Nature (London)255, 542 (1975)

  37. 37.

    P.S. Vincett, W.A. Barlow, G.G. Roberts: J. Appl. Phys.48, 3800 (1977)

  38. 38.

    P.S. Vincett, Z.D. Popovic, L. McIntyre: Thin Solid Films82, 357 (1981)

  39. 39.

    J. Singh, H. Bässler: Phys. Stat. Solidi (b)62, 147 (1974)

  40. 40.

    H. Sumi: J. Chem. Phys.70, 3775 (1979)

  41. 41.

    S. Nakano, Y. Maruyama: Solid State Commun.35, 671 (1980)

  42. 42.

    M. Pope, C.E. Swenberg:Electronic Processes in Organic Crystals (Clarendon Press, New York 1982)

  43. 43.

    J. Godlewski, J. Kalinowski: Mat. Sci.10, 81 (1984)

  44. 44.

    G.G. Roberts, T. M. McGinnity, W.A. Barlow, P.S. Vincett: Thin Solid Films68, 223 (1980)

  45. 45.

    N. Karl, H. Rohrbacher, D. Siebert: Phys. Stat. Solidi (a)4, 105 (1971)

  46. 46.

    L. Sebastian, G. Weiser, G. Peter, H. Bässler: Chem. Phys.75, 103 (1983)

  47. 47.

    Z. Dreger, J. Kalinowski: Unpublished results

  48. 48.

    J.L. Hall, D.A. Jenning, R.H. McClintock: Phys. Rev. Lett.11, 364 (1963)

  49. 49.

    V. Ern: Phys. Rev. Lett.22, 8 (1969)

  50. 50.

    Z. Burshtein, A. Many: Mol. Cryst. Liq. Cryst.25, 31 (1974)

  51. 51.

    D.C. Hoesterey, G.M. Letson: J. Phys. Chem. Solids24, 1609 (1963)

  52. 52.

    F.J. Bryant, A. Bree, P.E. Fielding, W.G. Schneider: Disc. Faraday Soc.28, 48 (1959)

  53. 53.

    H. Kokado, W.G. Schneider: J. Chem. Phys.40, 2937 (1964)

  54. 54.

    J.M. Thomas, J.O. Williams, G.A. Cox: Trans. Faraday Soc.64, 2469 (1968)

  55. 55.

    M. Samoć, A. Samoć, N. Karl: Sci. Papers Inst. Org. Phys. Chem. Wrocław Tech. Univ.16, 269 (1978)

  56. 56.

    N. Karl: InFestkörperprobleme 14, 261 (Vieweg, Braunschweig 1974)

  57. 57.

    N.I. Wakayama, N. Wakayama, D.F. Williams: Mol. Cryst. Liq. Cryst.26, 275 (1974)

  58. 58.

    P.J. Reucroft, F.D. Mullins: J. Chem. Phys.58, 2918 (1973)

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The work supported in part by the Polish Academy of Sciences under Program MR.I.9

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Kalinowski, J., Godlewski, J. & Dreger, Z. High-field recombination electroluminescence in vacuum-deposited anthracene and doped anthracene films. Appl. Phys. A 37, 179–186 (1985). https://doi.org/10.1007/BF00617504

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PACS

  • 71.35
  • 78.60F
  • 78.65