| Abstract [eng] |
Rare earth ions play an important role in modern optical technologies as the active constituents in many novel materials. There are an increasing number of applications for these rare-earth activated materials and much of today’s cutting-edge optical technology and future innovations are expected to rely on their unique properties. The main goal of this dissertation was development and investigation of new materials doped with divalent samarium ions. Usually, the best hosts for lanthanide ions are inorganic materials like crystals and glasses, because these ions generally show high quantum yields in these hosts. Two boron containing and two aluminate systems were selected for comprehensive optical properties investigation of mixed-valence samarium ions. Several synthesis methods were applied in order to achieve the selected tasks. Additionally, samarium valence state stability was examined as the function of the annealing conditions. X-ray analysis was used for validation of synthesized samples phase purity. Luminescent properties of mixed-valence samarium doped materials were investigated mainly using temperature dependent emission and intensity decay data. Assumptions on samarium occupied site symmetry were made, based on emission spectral features. Moreover, new divalent samarium stabilizing inorganic host was discovered. |
