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1996 | 90 | 1 | 151-160
Article title

Energy Transfer and Up-Conversion in the Erbium Elpasolites Cs_{2}NaEr_{x}Y_{1-x}Cl_{6}

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EN
Abstracts
EN
The luminescence decay curves from the ^{4}F_{9/2} and ^{4}I_{9/2} states of the cubic hexachloroelpasolite crystals Cs_{2}NaEr_{x}Y_{1-x}Cl_{6} (x = 0.001รท1) have been measured over the temperature range 10-300 K. The ^{4}I_{9/2} state undergoes an electric dipole vibronic-electric dipole vibronic cross-relaxation process at 300 K, but this mechanism is inefficient below 165 K. Excitation into the ^{4}F_{9/2} state, results in emission in the green, blue and ultra violet regions. The up-conversion processes which could account for the ultraviolet emission are discussed.
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author
  • Laser Laboratory, Department of Chemistry, Birkbeck College, University of London, 29 Gordon Square, London, WC1H 0PP, U.K.
author
  • Laser Laboratory, Department of Chemistry, Birkbeck College, University of London, 29 Gordon Square, London, WC1H 0PP, U.K.
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Publication order reference
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bwmeta1.element.bwnjournal-article-appv90z115kz
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