Anti-stokes luminescence of Zn{sub 0.75}Cd{sub 0.25}S microcrystals annealed in the presence of oxygen

The nature of anti-Stokes luminescence centers excited in the temperature range 77-300 K by light with wavelengths from 620 to 710 nm and intensities in the range 10{sup 15}-10{sup 16} photons/cm{sup 2} in Zn{sub 0.75}Cd{sub 0.25}S microcrystals annealed in the presence of oxygen has been investigat...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2009-03, Vol.43 (3)
Main Authors: Ovchinnikov, O. V., Smirnov, M. S., Kosyakova, E. A., Latyshev, A. N., Klyuev, V. G., Evlev, A. B., Utekhin, A. N., Aseeva, D. V.
Format: Article
Language:English
Subjects:
ANNEALING
CADMIUM OXIDES
CADMIUM SULFIDES
CRYSTALS
ENERGY LEVELS
EV RANGE 01-10
EXCITATION
LUMINESCENCE
MATERIALS SCIENCE
OXYGEN
PHOTONS
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
ZINC OXIDES
ZINC SULFIDES
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Summary:The nature of anti-Stokes luminescence centers excited in the temperature range 77-300 K by light with wavelengths from 620 to 710 nm and intensities in the range 10{sup 15}-10{sup 16} photons/cm{sup 2} in Zn{sub 0.75}Cd{sub 0.25}S microcrystals annealed in the presence of oxygen has been investigated. It is shown that the centers of two-photon excitation of this luminescence are clusters of native metal oxides (ZnO){sub n} and (CdO){sub n}, whose energy levels in the Zn{sub 0.75}Cd{sub 0.25}S band gap are 1.70-1.95 eV below the bottom of the conduction band.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782609030154