The influence of Er3+ ions on fluorescence lifetimes of Er3+ in single crystals of BaF2 ― SrF2 ― ErF3 solid solutions

We present the luminescence radiative lifetime of of Er
³
+ in single crystals of BaF2 -SrF2 -ErF3 solid solutions at room (300 K) temperature. The results show that the lifetime of Er
³⁺
depends significantly on content of Er
³⁺
ion in the single crystals. Increasing Er
³
+ from 0.1 to 20% leads to decreasing the lifetimes from 39.3(3) to 10.8(1) ms for
⁴

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that can be explained by concentration quenching of luminescence due to higher content of the activating ion.