Effects of Disorder on the Spectral Properties of Cr-Doped Glasses, Glassceramics and Crystals

  • G. Boulon
Part of the Ettore Majorana International Science Series book series (EMISS, volume 46)


The illustrations of the role played by the disordered structures on the optical properties of luminescent materials are numerous. Among the different activator ions, it is especially interesting to consider the Cr3+ ion. This ion is not only a structural probe but also a nucleating agent which generates nanocrystallites and microcrystallites inside the vitreous phase so that it gives us the possibility to follow the evolution of the structure from the glassy phase to the crystalline phase via the glass-ceramic phase. In all materials, the disordered occupation of Cr3+ sites is a general tendency. Systematically regular, perturbed and pair ions are detected by the presence of the 2E→4A2 zero-phonon lines associated with vibronic bands. In addition, energy transfers take place between each kind of site and rigorous interpretations are difficult. Anyway the relations between the structural properties and the optical properties of Cr3+-doped compounds have to be studied not only for basic research reasons but also for applications in lasers and luminescent solar collectors. In this course we will see a few examples of Cr3+-doped different host networks like oxide glasses, spinel-type glassceramics and tunable solid-state lasers by using mainly the recent Laser-Spectroscopy techniques.


Crystal Field Octahedral Site Glassy Phase Energy Transfer Mechanism Gadolinium Gallium Garnet 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • G. Boulon
    • 1
  1. 1.Laboratoire de Physico-Chimie des Matériaux Luminescents Unité Associée au CNRSUniversité Claude Bernard de LyonVilleurbanne-cédexFrance

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