Tailoring multiphonon relaxation and cross relaxation energy transfer in mixed ionic-electronic 20Li2O-xBi2O3-(78-x)TeO2-1Er2O3-1Ag glasses at NIR region
Source abstract
Abstract
A glass composed of 20Li 2O- xBi 2O 3-(78- x)TeO 2-1Er 2O 3-1Ag was fabricated by melt–quenching method to examine the influence of mixed ionic–electronic (MIE) effect on AC conductivity ( σ AC ) and photoluminescence properties. The σ AC decreased as the Bi 2O 3 content increased, until a minimum σ AC at x =11 mol% attributable to the MIE effect was achieved. The photoluminescence intensity and lifetime ( τ m e s ) of the 4I 13/2→ 4I 15/2 transition were reported with a drop at x=11 mol%, coincided with the minimum σ AC. Results on the analysis of the multiphonon relaxation rate (W MPR) revealed that adding low-phonon Bi 2O 3 concentration promoted higher photoluminescence intensity and longer τ m e s due to the reduction in W MPR. However, the drop in photoluminescence intensity and τ m e s at x=11 mol% may be due to a blocking effect. The blocking effect may have induced nonradiative phonon-assisted S ab and cross-relaxation γ 6 energy transfer, leading to a maximum W MPR and energy transfer parameter.
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Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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