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Effect of induced crystallization in rare-earth doped lithium borate glass

: Steudel, F.; Rimbach, A.C.; Loos, S.; Ahrens, B.; Schweizer, S.


Radiation measurements 90 (2016), S.274-278
ISSN: 1350-4487
International Conference on Luminescent Detectors and Transformers of Ionizing Radiation (LUMDETR) <9, 2015, Tartu>
Zeitschriftenaufsatz, Konferenzbeitrag
Fraunhofer IMWS ()

Rare-earth doped borate glasses and glass ceramics are investigated for their potential as photon converters. Thermal processing of the as-made glass results in the formation of nanocrystals therein. For optical activation, the glasses are doped with Eu3+ and Tb3+, both enabling an intense emission under ultraviolet excitation. Differential scanning calorimetry and X-ray diffraction are applied to analyze the crystallization behavior. Compared to the undoped glass, the glass transition temperature as well as the crystallization temperature are increased with Eu3+ doping. Upon thermal processing of the as-made glasses, the transmittance is significantly reduced. Preliminary photoluminescence quantum efficiency measurements yield lower values for the glass ceramics.