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1996 | 90 | 4 | 821-824
Article title

Influence of Magnetic Field on Blue Anti-Stokes Luminescence of ZnSe:Cr Crystals

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Languages of publication
EN
Abstracts
EN
The results of photoluminescence and magneto-luminescence studies of chromium doped ZnSe crystals are presented for blue colour shallow donor-shallow acceptor pair photoluminescence, with a zero phonon line at 2.692 eV. This donor-acceptor pair photoluminescence is observed under photo-excitation with photon energies smaller than the emission energy (anti-Stokes luminescence) and dominates in the photoluminescence spectrum of ZnSe:Cr at the excitation energy about 2.41 eV and for temperature T<20 K. A quantum efficiency of this anti-Stokes luminescence is relatively large. It is of about 10^{-3} at 0 T and increases with increasing magnetic field up to 7 T at temperature T=2 K. We relate the intensity of the anti-Stokes luminescence to a non-equilibrium concentration of photo-excited Cr^{+} ions and propose that the rate of spin-dependent recombination of Cr^{+} ions with free holes (decreases with increasing magnetic field) is responsible for the observed increase in the anti-Stokes luminescence intensity at higher magnetic fields.
Keywords
EN
Publisher

Year
Volume
90
Issue
4
Pages
821-824
Physical description
Dates
published
1996-10
Contributors
author
  • Department of Physics, University of Dnepropetrovsk, 320625, Dnepropetrovsk, Ukraine
author
  • Institute of Semiconductors Physics, National Acad. of Science, 252650, Kiev, Ukraine
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 42/36, 02-668 Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 42/36, 02-668 Warsaw, Poland
References
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Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv90z437kz
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