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Low phonon energy BaCl2 nanocrystals in Nd3+-doped fluorozirconate glasses and their influence on the photoluminescence properties

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Abstract

Nd3+-doped fluorozirconate glasses, which were additionally doped with chlorine ions, were investigated for their photoluminescence (PL) properties. Upon heat treatment of the as-made glass, hexagonal phase BaCl2 nanocrystals are formed within the material, which undergo a phase transformation to orthorhombic BaCl2 upon annealing at a higher temperature. The glasses with hexagonal phase BaCl2 nanocrystals show an enhanced Nd3+ PL in the visible spectral range. Time-resolved spectroscopy on the 4 G5/2 / 2 G7/2 → 4 I9/2 transition shows that the existence of hexagonal BaCl2 nanocrystals results in a significantly longer decay time. The temperature dependence of the lifetime yielded that the enhanced PL is due to a reduced multi-phonon relaxation rate.

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Acknowledgments

This work was supported by the FhG Internal Programs under Grant No. Attract 692 034. In addition, the authors would like to thank the Ministry for Education and Research (“Bundesministerium für Bildung und Forschung”) for their financial support within the Centre for Innovation Competence SiLi-nano® (project number 03Z2HN11).

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Authors and Affiliations

  1. Centre for Innovation Competence SiLi-nano®, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120, Halle (Saale), Germany

    Charlotte Pfau, Ulrich Skrzypczak, Manuela Miclea, Christian Bohley & Stefan Schweizer

  2. Fraunhofer Center for Silicon Photovoltaics CSP, Walter-Hülse-Str. 1, 06120, Halle (Saale), Germany

    Paul-Tiberiu Miclea & Stefan Schweizer

Authors
  1. Charlotte Pfau
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  2. Ulrich Skrzypczak
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  3. Manuela Miclea
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  4. Christian Bohley
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  5. Paul-Tiberiu Miclea
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  6. Stefan Schweizer
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Pfau, C., Skrzypczak, U., Miclea, M. et al. Low phonon energy BaCl2 nanocrystals in Nd3+-doped fluorozirconate glasses and their influence on the photoluminescence properties. MRS Online Proceedings Library 1404, 90–95 (2012). https://doi.org/10.1557/opl.2012.502

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