Journal of Electronic Materials

, Volume 28, Issue 3, pp 240–245

Visible-blindness in photoconductive and photovoltaic AlGaN ultraviolet detectors

  • E. Monroy
  • F. Calle
  • E. Muñoz
  • F. Omnès
  • B. Beaumont
  • P. Gibart
Special Issue Paper


The influence of the photodetection mechanism on the performance of AlGaN ultraviolet (UV) detectors is analyzed by studying the characteristics of photoconductors and photovoltaic Schottky diodes fabricated on the same samples. The photoconductive response below the bandgap is not a direct function of the absorption coefficient. Instead, it is amplified by the dominant photoconductive responsivity mechanism, which is attenuated as the chopping frequency increases. On the contrary, photovoltaic detectors are characterized by a sharp UV/visible contrast, mainly dependent on the absorption properties of the material. Thus, these detectors are more suitable for selective UV applications, such as ozone layer monitoring or flame detection.

Key words

AlGaN detectors photoconductive photovoltaic ultraviolet (UV) 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    M. Razeghi and A. Rogalski, J. Appl. Phys. 79, 7433 (1996).CrossRefGoogle Scholar
  2. 2.
    M. AsifKhan, J.N. Kuznia, D.T. Olson, J.M. Van Hove and M. Blasingame, Appl. Phys. Lett. 60, 2917 (1992).CrossRefGoogle Scholar
  3. 3.
    P. King, X. Zhang, D. Walker, A. Saxler, J. Piotrowski, A. Rogalski and M. Razeghi, Appl. Phys. Lett. 67, 3792 (1995).CrossRefGoogle Scholar
  4. 4.
    F. Binet, J.Y. Duboz, E. Rosencher, F. Scholz and V. Härle, Appl. Phys. Lett. 69, 1202 (1996).CrossRefGoogle Scholar
  5. 5.
    C.H. Qiu, W. Melton, M.W. Leksono, J.I. Pankove, B.P. Keller and S.P. DenBaars, Appl. Phys. Lett. 69, 1282 (1996).CrossRefGoogle Scholar
  6. 6.
    J.Z. Li, J.Y. Lin, H.X. Jiang, A. Salvador, A. Botchkarev and H. Morkoç, Appl. Phys. Lett. 69, 1474 (1996).CrossRefGoogle Scholar
  7. 7.
    C. Johnson, J.Y. Lin, H.X. Jiang, M.A. Khan and C.J. Sun, Appl. Phys. Lett. 68, 1808 (1996).CrossRefGoogle Scholar
  8. 8.
    C.H. Qiu and J.I. Pankove, Appl. Phys. Lett. 70, 1983 (1997).CrossRefGoogle Scholar
  9. 9.
    H.M. Chen, Y.F. Chen, M.C. Lee and M.S. Feng, J. Appl. Phys. 82, 899 (1997).CrossRefGoogle Scholar
  10. 10.
    G. Beardie, W.S. Rabinovich, A.E. Wickenden, D.D. Koleske, S.C. Binari and J.A. Freitas, Jr., Appl. Phys. Lett. 71, 1092 (1997).CrossRefGoogle Scholar
  11. 11.
    M.T. Hirsch, J.A. Wolk, W. Walukiewicz and E.E. Haller, Appl. Phys. Lett. 71, 1098 (1997).CrossRefGoogle Scholar
  12. 12.
    L.B. Flannery, I. Harrison, D.E. Lacklison, R.I. Dykeman, T.S. Cheng and C.T. Foxon, Mater. Sci. Eng. B 50, 307 (1997).CrossRefGoogle Scholar
  13. 13.
    C.V. Reddy, K. Balakrishnan, H. Okumura and S. Yoshida, Appl. Phys. Lett. 73, 244 (1998).CrossRefGoogle Scholar
  14. 14.
    C.H. Qiu, C. Hoggatt, W. Melton, M.W. Leksono and J.I. Pankove, Appl. Phys. Lett. 66, 2712 (1998).CrossRefGoogle Scholar
  15. 15.
    J.Z. Li, J.Y. Lin, H.X. Jiang and M.A. Khan, Appl. Phys. Lett. 72, 2868 (1998).CrossRefGoogle Scholar
  16. 16.
    E. Muñoz, E. Monroy, J.A. Garrido, I. Izpura, F.J. Sánchez, M.A. Sánchez-Garcia and E. Calleja, Appl. Phys. Lett. 71, 870 (1997).CrossRefGoogle Scholar
  17. 17.
    E. Monroy, J.A. Garrido, E. Muñoz, I. Izpura, F.J. Sánchez, M.A. Sánchez-Garcia, E. Calleja, B. Beaumont and P. Gibart, MRS Internet J. Nitride Semicond. Res. 2, 28 (1997) ( Scholar
  18. 18.
    E. Monroy, F. Calle, C. Angulo, P. Vila, A. Sanz, J.A. Garrido, E. Muñoz, E. Calleja, F. Omnès, B. Beaumont and P. Gibart, Appl. Opt. 37, 5058 (1998).CrossRefGoogle Scholar
  19. 19.
    J.A. Garrido, E. Monroy, I. Izpura and E. Muñoz, Semicond. Sci. Technol. 13, 563 (1998).CrossRefGoogle Scholar
  20. 20.
    M.A. Khan, J.N. Kuznia, D.-T. Olson, M. Blasingame and A.R. Bhattarai, Appl. Phys. Lett. 63, 2455 (1993).CrossRefGoogle Scholar
  21. 21.
    F. Binet, J.Y. Duboz, N. Laurent, E. Rosencher, O. Briot and R.L. Aulombard, J. Appl. Phys. 81, 6449 (1997).CrossRefGoogle Scholar
  22. 22.
    Q. Chen, J.W. Yang, A. Osinsky, S. Gangopadhyay, B. Lim, M.Z. Anwar, W.A. Khan, D. Kuksenkov and H. Tempkin, Appl. Phys. Lett. 70, 2277 (1997).CrossRefGoogle Scholar
  23. 23.
    A. Osinsky, S. Gangopadhyay, J.W. Yang, R. Gaska, D. Kuksenkov, H. Temkin, I.K. Shmagin, Y.C. Chang, J.F. Muth and R.M. Kolbas, Appl. Phys. Lett. 72, 551 (1998).CrossRefGoogle Scholar
  24. 24.
    D. Walker, X. Zhang, A. Saxler, P. Kung, J. Xu and M. Razeghi, Appl. Phys. Lett. 70, 949 (1997).CrossRefGoogle Scholar
  25. 25.
    E. Monroy, F. Calle, J.A. Garrido, P. Youinou, E. Muñoz, F. Omnès, B. Beaumont and P. Gibart, (unpublished).Google Scholar
  26. 26.
    A. Osinsky, S. Gangopadhyay, B.W. Lim, M.Z. Anwar, M.A. Khan, D. Kuksenkov and H. Tempkin, Appl. Phys. Lett. 72, 742 (1998).CrossRefGoogle Scholar
  27. 27.
    E. Monroy, F. Calle, E. Muñoz, F. Omnès, P. Gibart and J.A. Muñoz, Appl. Phys. Lett. 73, 2146 (1998).CrossRefGoogle Scholar
  28. 28.
    E. Monroy, F. Calle, E. Muñoz, F. Omnès, P. Gibart, J.A. Muñoz, and F. Cussó, Internet J. Nitride Semicond. Res. 3, Art. 9 (1998) ( Scholar
  29. 29.
    F. Omnès, N. Marenco, S. Haffouz, H. Lahreche, Ph. de Mierry, B. Beaumont, P. Hageman, E. Monroy, F. Calle and E. Muñoz, Mater. Sci. Eng. B (to be published).Google Scholar
  30. 30.
    P.J. Hansen, Y.E. Strausser, A.N. Erickson, E.J. Tarsa, P. Kozodoy, E.G. Brazel, J.P. Ibbetson, U. Mishra, V. Narayananurti, S.P. DenBaars and J.S. Speck, Appl. Phys. Lett. 72, 2247 (1998).CrossRefGoogle Scholar
  31. 31.
    J.P. Vilcot, J.L. Vaterkowski, D. Decoster and M. Constant, Electron. Lett. 20, 86 (1984).CrossRefGoogle Scholar
  32. 32.
    H.J. Queiser, Phys. Rev. Lett. 54, 234 (1985).CrossRefGoogle Scholar

Copyright information

© TMS-The Minerals, Metals and Materials Society 1999

Authors and Affiliations

  • E. Monroy
    • 1
  • F. Calle
    • 1
  • E. Muñoz
    • 1
  • F. Omnès
    • 2
  • B. Beaumont
    • 2
  • P. Gibart
    • 2
  1. 1.Dept. de Ingenieria Electrónica, ETSI TelecomunicaciónUniversidad Politécnica de MadridMadridSpain
  2. 2.CRHEA-CNRS, Parc Sophia AntipolisValbonneFrance

Personalised recommendations