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The effect of substitutional H− Ions on the optical and Electrical Properties of Thermochemically-Reduced MgO and CaO

Published online by Cambridge University Press:  21 February 2011

G. P. Summers  and
K. Chakrabarti
G. P. Summers
Affiliation:
Department of Physics, Oklahoma State UniversityStillwater, Oklahoma 74074, U.S.A.
K. Chakrabarti
Affiliation:
Department of Physics, Oklahoma State UniversityStillwater, Oklahoma 74074, U.S.A.
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Abstract

Thermochemical reduction at high temperature of MgO and CaO single crystals introduces both anion vacancies, with absorption in the ultraviolet, and substitutional H− ions, with local mode absorptions near 1000 cm−1. The source of the hydrogen is water in the starting material. H− ions strongly influence the photoluminescence and thermoluminescence of the samples and enable F center luminescence to be excited at low temperature by low energy, E<1.8 eV, radiation. The long-lived luminescence of anion vacancies in these samples is accompanied by photoconductivity and a large dark current which increases as the concentration of H− ions increases. The activation energy for release of electrons from H= ions can be calculated from the temperature dependence of the F center luminescence decay.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 24: Symposium B – Defect Properties and Processing of High-Technology Nonmetallic Materials , 1983 , 233
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

1. Gonzalez, R., Chen, Y., and Mostoller, M., Phys. Rev. B 24, 6862 (1981).CrossRefGoogle Scholar
2. Briggs, A., J. Mater. Sci. 10, 729 (1975).CrossRefGoogle Scholar
3. Jeffries, B. T., Gonzalez, R., Chen, Y., and Summers, G. P., Phys. Rev. B 25, 2077 (1982).CrossRefGoogle Scholar
4. Summers, G. P., Wilson, T. M., Jeffries, B. T., Tohver, H. T., Chen, Y., and Abraham, M. M., Phys. Rev. B 27, 1283 (1983).CrossRefGoogle Scholar
5. Chen, Y., Gonzalez, R., Schow, O. E., and Summers, G. P., Phys. Rev. B 27, 1276 (1983).CrossRefGoogle Scholar
6. Roberts, R. W. and Crawford, J. H., J. Nonmetals 2, 133 (1974).Google Scholar
7. Keller, F. J. and Murray, R. B., Phys. Rev. 150, 670 (1966).CrossRefGoogle Scholar