Skip to main content Accessibility help
×
Home

Intrinsic Carrier Concentrations in Long Wavelength HgCdTe Based on the New, Nonlinear Temperature Dependence of Eg (x,T)

  • D. G. Seiler (a1), J. R. Lowney (a1), C. L. Littler (a2) and I. T. Yoon (a2)

Abstract

Intrinsic carrier concentrations of narrow-gap Hg1-xCdxTe alloys (0.17≦ x ≦0.30) have been calculated as a function of temperature between 0 and 300 K by using the new nonlinear temperature dependence of the energy gap obtained previously by twophoton magneto-absorption measurements for samples with 0.24≦ x ≦0.26. We report here experimental values for Eg (x,T) for samples with x = 0.20 and 0.23 obtained by one-photon magneto-absorption measurements. These data confirm the validity of the new Eg (x,T) relationship for these : values. In this range of composition and temperature, the energy gap of mercury cadmium telluride is small, and very accurate values are needed for the gap to obtain reliable values for the intrinsic carrier density. Large percentage differences exist between our new calculations and previous values for ni at low temperatures. Even at 77 K, differences approaching 10 percent exist, confirming the importance of using the new ni results for materials and device characterization and a proper understanding of device operation in long-wavelength materials.

Copyright

Footnotes

Hide All

Contribution of the National Institute of Standards and Technology; not subject to copyright.

Footnotes

References

Hide All
1. Hansen, G. L. and Schmit, J. L., J. Appl. Phys. 54, 1639 (1982).
2. Madarasz, F. L. and Szmulowicz, F., J. Appl. Phys. 58, 2770 (1985).
3. Nemirovsky, Y. and Finkman, E., J. Appl. Phys. 50, 8107 (1980).
4. Seiler, D. G., Lowney, J. R., Littler, C. L., and Loloee, M. R., J. Vac. Sci. Technol. A 8, 1237 (1990).
5. Hansen, G. L., Schmit, J. L., and Casselman, T. N., J. Appl. Phys. 53, 7099 (1982)
6. Kane, E. O., J. Phys. Chem. Solids 1, 249 (1957).
7. Schmit, J. L., J. Appl. Phys. 41, 2876 (1970).
8. Weiler, M. H., Semiconductors and Semimetals, edited by Willardson, and Beer, (Academic, New York, 1981), Vol. 16, p. 119.
9. Seiler, D. G., Littler, C. L., Loloee, M. R., and Milazzo, S. A., J. Vac. Sci. Technol. A 7, 370 (1989).

Intrinsic Carrier Concentrations in Long Wavelength HgCdTe Based on the New, Nonlinear Temperature Dependence of Eg (x,T)

  • D. G. Seiler (a1), J. R. Lowney (a1), C. L. Littler (a2) and I. T. Yoon (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed