Concentration-dependent and enhanced luminescence in Ge 23.5 Ga 11.5 Se 65 glasses and glass-ceramics doped with Er 3 +
We have reported the fabrication and characterization of Ge23.5Ga11.5Se65 glasses and glass-ceramics with different Er3+ concentrations. It was found that, the emission properties of the bulk glasses showed the fluorescence intensity and lifetime increased until they reached a maximum, and then decreased with increasing Er3+ concentration. This is due to concentration quenching effect although the maximum dissolving concentration of Er3+ can be up to ∼1 wt% of Er. A careful thermal process has...[Show more]
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