Journal of Materials Science

, 26:4774 | Cite as

Organic photoconductors: Dark and photoconduction studies in two p-dimethylamino styryl dyes derived from pyridine-2 and pyridine-4

  • P. K. Narasimharaghavan
  • Hari Om Yadav
  • T. S. Varadarajan
  • L. N. Patnaik
  • S. Das
Papers

Abstract

Results of our experiments on the dark and photoconduction studies in two p-dimethylamino styryl dyes derived from pyridine-2 (PDMS-P2) and pyridine-4 (PDMS-P4) in their pure form without any dopant or additive are reported. Measurements on surface-type (raster pattern) cells show that the dark and photocurrents are dependent on the applied potential, temperature, and the photocurrent on the intensity of the incident radiation and the wavelength. Action spectra of the samples could not be recorded as the intensity of the monochromatic radiation from the monochromator reaching the sample was too low to induce any noticeable photocurrent. The compounds show a low dark conductivity. The dark and photocurrents show a perfect ohmic behaviour in the temperature range studied (288–328 K). Since photoconduction could only be observed in a vacuum, this clearly indicates that the compounds are n-type semiconductors. The observed rise and decay kinetics of the photocurrents indicate the presence of traps in the forbidden zone. The dyes show an enhanced photoconduction on illumination with visible radiation only. The marked open circuit voltage and the short-circuit current observed in these compounds indicate a possible application in solar photovoltaics.

Keywords

PDMS Phthalocyanine Solar Photovoltaic Astacin Photoconductive Gain 

References

  1. 1.
    F. H. Moses and A. L. Thomas, “Phthalocyanine Compounds” (Rhenold, New York, 1963).Google Scholar
  2. 2.
    H. Meier, Topics in Current Chemistry 61 (1976) 87.Google Scholar
  3. 3.
    J. W. Weigl, Angew. Chem. 89 (1977) 386.Google Scholar
  4. 4.
    S. Nakamura, T. Ozaki, K. Toriyama, K. Iida and G. Sawa, Jap. J. Appl. Phys. 81 (1989) 991.CrossRefGoogle Scholar
  5. 5.
    J. P. Launary, M. Sowinska, L. Leydier and A. Gourdon, Chem. Phys. Lett. 160 (1989) 89.CrossRefGoogle Scholar
  6. 6.
    H. Meier, U. Tschirwitz, E. Zimmerhackl, W. Albrecht and G. Zeitler, J. Phys. Chem. 81 (1977) 712.CrossRefGoogle Scholar
  7. 7.
    H. Meier, W. Albrecht, U. Tschirwitz, N. Geheeb and E. Zimmerhackl, Ber. Bunsenges. Phys. Chem. 81 (1977) 592.Google Scholar
  8. 8.
    T. Klofta, C. Linkons and N. R. Armstrong, J. Elecktroanal. Chem. 185 (1985) 73.CrossRefGoogle Scholar
  9. 9.
    H. Meier and W. Albrecht, Ber. Bunsenge. Phys. Chem. 73 (1969) 86.Google Scholar
  10. 10.
    A. T. Twarowski, J. Chem. Phys. 76 (1982) 2640.CrossRefGoogle Scholar
  11. 11.
    H. Meier, “Organic Semiconductors: Dark and photoconductivity of organic solids” (Verlag Chemie, Weinheim, 1974).Google Scholar
  12. 12.
    F. R. Fan and L. R. Faulkner, J. Chem. Phys. 69 (1978) 3341.CrossRefGoogle Scholar
  13. 13.
    M. Martin, J. J. Andre and J. Simon, J. Appl. Phys. 54 (1983) 2792.CrossRefGoogle Scholar
  14. 14.
    M. Shimura and A. Toyoda, Jap. J. Appl. Phys. 23 (1984) 1462.CrossRefGoogle Scholar
  15. 15.
    J. H. Perlstein, in “Electrical properties of polymers”, edited by D. A. Seanor (Academic Press, London, 1982).Google Scholar
  16. 16.
    K. Kudo and T. Moriizumi, Jap. J. Appl. Phys. 20 (1981) L553.CrossRefGoogle Scholar
  17. 17.
    F. Galluzzi, J. Phys. D: Appl. Phys. 18 (1985) 685.CrossRefGoogle Scholar
  18. 18.
    M. Tomida, S. Kusabayashi and M. Yokoyama, Chem. Lett. (1984) 1305.Google Scholar
  19. 19.
    M. Q. Doja and D. Prasad, Ind. J. Chem. Soc. 20 (1943) 153.Google Scholar
  20. 20.
    N. Kazumi, H. Yoshioka and H. Moroshita, Acta Cryst. B-33 (1977) 2181.Google Scholar
  21. 21.
    P. J. Wheatley, J. Chem. Soc. (1959) 3245.Google Scholar
  22. 22.
    R. C. Nelson, J. Chem. Phys. 22 (1955) 885.CrossRefGoogle Scholar
  23. 23.
    Idem., ibid. 23 (1955) 1550.CrossRefGoogle Scholar
  24. 24.
    Idem., J. Opt. Soc. Amer. 50 (1960) 1029.CrossRefGoogle Scholar
  25. 25.
    S. C. Dahlberg and M. E. Musser, J. Chem. Phys. 70 (1979) 5021.CrossRefGoogle Scholar
  26. 26.
    Idem., ibid. 71 (1979) 2806.CrossRefGoogle Scholar
  27. 27.
    G. A. Chamberlein, Nature 289 (1981) 45.CrossRefGoogle Scholar
  28. 28.
    P. Yamin, J. Phys. Chem. 86 (1982) 3796.CrossRefGoogle Scholar
  29. 29.
    J. Mott and N. L. Jarvis, J. Amer. Chem. Soc. 106 (1984) 4706.CrossRefGoogle Scholar
  30. 30.
    F. Gutman and L. E. Lyons, “Organic Semiconductors” (Wiley & Sons, New York, 1967) p. 117.Google Scholar
  31. 31.
    Z. R. Grabowski, K. Rotkiewicz, A. Siemiavczuk, D. J. Cowley and W. Baumann, Nouv. J. Chim. 3 (1979) 443.Google Scholar
  32. 32.
    W. Rettig, Angew. Chem. Intern. Ed. 25 (1986) 971.CrossRefGoogle Scholar
  33. 33.
    E. Lippert, W. Rettig, V. Bonacic-Koutecky, F. Heisel and J. Meihe, Adv. Chem. Phys. 68 (1987) 1.Google Scholar
  34. 34.
    M. Sowinska, J. Launay, J. Mugnier, J. Pouget and B. Valeur, J. Photochem. 37 (1987) 69.CrossRefGoogle Scholar
  35. 35.
    L. N. Patnaik and S. Das, Tetrahedron Lett. 21 (1985) 4961.Google Scholar
  36. 36.
    P. K. Narasimharaghavan, Ph.D. Thesis, Bombay University (1987).Google Scholar
  37. 37.
    H. Meiei, W. Albrecht, D. Wohrle and A. Jahn, J. Phys. Chem. 90 (1986) 6349.CrossRefGoogle Scholar
  38. 38.
    H. Meier, W. Albrecht, E. Zimmerhackl, M. Hanack and J. Metz, Syn. Met. 11 (1985) 333.CrossRefGoogle Scholar
  39. 39.
    A. Rose, “Concepts in Photoconductivity and Allied Problems” (Interscience, New York, 1963).Google Scholar
  40. 40.
    F. Stockmann, Phys. Stat. Solidi 34 (1969) 741.Google Scholar
  41. 41.
    L. V. Azarraga, Ph.D. Thesis, Lousiana State University (1964).Google Scholar
  42. 42.
    P. Pal, D. Gosh and T. N. Mishra, J. Phys. Soc. Jap. 57 (1988) 1006.CrossRefGoogle Scholar
  43. 43.
    H. Meier, “Die Photochemie der Organischen Fabstoffe” (Springer-Verlag, Berlin, 1963) p. 173.Google Scholar
  44. 44.
    H. Meier and W. Albrecht, Z. Phys. Chem. Neue Folge Bd. 148 (1986) 171.Google Scholar
  45. 45.
    R. O. Loutfy, B. S. Ong and J. Jadros, J. Imag. Sci. 29 (1985) 69.Google Scholar
  46. 46.
    F. M. Hamer, J. Chem. Soc. (1956) 1480.Google Scholar
  47. 47.
    F. M. Hamer, in “The Cyanine Dyes and related Compounds” (Interscience, 1964) p. 438.Google Scholar
  48. 48.
    L. N. Patnaik, Personal Communications.Google Scholar

Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • P. K. Narasimharaghavan
    • 1
  • Hari Om Yadav
    • 1
  • T. S. Varadarajan
    • 1
  • L. N. Patnaik
    • 2
  • S. Das
    • 2
  1. 1.Centre for Advanced Studies in Applied Chemistry, Department of Chemical TechnologyUniversity of BombayBombayIndia
  2. 2.Department of ChemistryRavenshaw CollegeCuttackIndia

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