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- W2170922029 abstract "Er3+–Y3+ codoped SiO2 powdered bulks were prepared by a sol–gel process. The effect of Y3+ codoping on the fluorescence properties and structural development of Er3+-doped SiO2 is investigated. The maximum ∼1.54 µm photoluminescence (PL) intensity occurs in the sample with Er3+ (10 mol%)–Y3+ (50 mol%) codoped and annealed at 985 °C. This can be attributed to the competition between the content of hydroxy groups and Er site symmetry. Improvement of optimum PL properties due to Y3+ codoping by a factor of ∼20 for intensity and 1.8 for the full width at half maximum (57 nm) was obtained in comparison with the Er3+-doped SiO2 system. Extended X-ray absorption fine structure analysis shows that the local chemical environment of Er3+ ions in the Er3+–Y3+ codoped SiO2 is similar to that in Er2O3. The average spatial distance between Er3+ ions is enlarged due to a partial substitution of Y3+ for Er3+ ions in the Er2O3-like local structure, which results in a reduction of the concentration quenching effect." @default.
- W2170922029 created "2016-06-24" @default.
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- W2170922029 date "2002-03-04" @default.
- W2170922029 modified "2023-09-25" @default.
- W2170922029 title "Fluorescence enhancement and structural development of sol–gel derived Er3+-doped SiO2 by yttrium codoping" @default.
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- W2170922029 doi "https://doi.org/10.1039/b107380j" @default.
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