Abstract
The effect of erbium concentration on thermal stability and quantum efficiency of excited states was studied using DSC, XRD and optical methods. A large value of stability parameter Δ T close to 118 °C has been obtained for fluoroindate glass singly doped with 2 mol% of erbium ions. With increasing erbium concentration stability parameter extremely decreased and several crystalline peaks appeared, what was stated by X-ray diffraction. Also, the strong luminescence quenching is observed. This behavior is consistent with nonradiative processes related to the Er–Er interaction.
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