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Ba2ErCl7—a new near IR to near UV upconversion material

Authors

  • Philipp Egger,

    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • Peter Rogin,

    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • Toni Riedener,

    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • Prof. Hans Ulrich Güdel,

    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • Dr. Mathias Siegfried Wickleder,

    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • Prof. Jürg Hulliger

    Corresponding author
    1. Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
    • Institute of Inorganic, Analytical, and Physical Chemistry University of Berne Freiestrasse 3, CH-3012 Berne (Switzerland)
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  • This work was supported by the Swiss National Science Foundation (projects: 21-37166.93, 20-43116.95), the Priority Program “Optics I” of the Swiss Board of the Federal Institutes of Technology, the Hochschulstiftung of the University of Berne, and the Portland Cement Foundation. We thank T. Armbruster (University of Berne) for the use of a diffractometer, B. Trusch, C. Andreoli, and N. Furer for experimental assistance.

Abstract

New near IR to near UV upconversion (UC) materials are required for the development of solid state lasers pumped by laser diodes. Two materials are reported: an air-stable and efficient UC material emitting mostly in the yellowish-green and a very promising UC compound, Ba2ErCl7, which is being further characterized spectroscopically. THe general requirements for UC materials are briefly discussed, and the preparation of Ba2ErCl7 detailed. The intensity of individual emission bands is compared for known and new UC materials.

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