Advertisement

Observation of Very Deep Levels by Optical DLTS

  • B. Deveaud
  • B. Toulouse

Abstract

Current transient spectroscopy (OTCS) is known to be able to give the electrical characteristics of the traps in semi-insulating material, as classic DLTS is in n- or p-type semiconductors. The method is limited by difficulties occurring for very deep traps. We explain here the difficulties — mainly the occurrence of negative transients — and set up an experimental procedure to interpret the data. Our first results show that, in Bridgman GaAs:Cr, the HL1 and EL2 levels are not the only levels that are present. At comparable concentration, the HL1 trap can be detected but the EL2 trap cannot.

Keywords

Deep Level Arrhenius Plot Negative Peak Current Transient Deep Trap 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Hurtes, C., Boulou, A., Mitonneau, A. and Bois, D. (1978). Appl. Phys. Lett., 32, 821CrossRefGoogle Scholar
  2. 2.
    Martin, G.M. and Bois, D. (1978). Conf. on Characterization Techniques for Semiconductor Materials and Devices, Seattle, 78, 32Google Scholar
  3. 3.
    Sah, C.T., Forbes, L., Rosier, L.L. and Tasch, A.F. (1970). Solid St. Electron., 13, 759CrossRefGoogle Scholar
  4. 4.
    Martin, G.M., Mitonneau, A., Pons, D., Mircea, A. and Woodard, D.W. (1980). To be published in J. Phys. C.: Solid St. Phys. Google Scholar
  5. 5.
    Mitonneau, A., Mircea, A., Martin, G.M. and Pons, D. (1979). Rev. Phys. Appl., 14, 853CrossRefGoogle Scholar
  6. 6.
    Bois, D., Chantre, A., Vincent, G. and Nouaillhat, A. (1978). Inst. Phys. Conf. Ser., 43, 295Google Scholar

Copyright information

© B. Deveaud and B. Toulouse 1980

Authors and Affiliations

  • B. Deveaud
    • 1
  • B. Toulouse
    • 1
  1. 1.Centre National d’Etudes des Télécommunications (LAB/ICM/MPA)LannionFrance

Personalised recommendations