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Influence of aluminum ions on fluorescent spectra and upconversion in codoped and glass system
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10.1063/1.3464257
/content/aip/journal/jap/108/2/10.1063/1.3464257
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3464257

Figures

Image of FIG. 1.
FIG. 1.

DSC traces of glasses mixed with 6.0 mol % of for all the three series. Inset shows the variation in and with concentration for series.

Image of FIG. 2.
FIG. 2.

IR spectra of glass system doped with recorded at room temperature at different concentrations of .

Image of FIG. 3.
FIG. 3.

Raman spectra of glass system doped with at different concentrations of .

Image of FIG. 4.
FIG. 4.

(a). Optical absorption spectra of glasses doped with recorded at room temperature. All transitions are from the ground state . (b) Optical absorption spectra of glasses doped with recorded at room temperature. All transitions are from the ground state . (c) Optical absorption spectra of glasses codoped with and recorded at room temperature.

Image of FIG. 5.
FIG. 5.

(a). Comparison plot of emission spectra of : glasses with varying concentrations of . (b) Comparison plot of emission spectra of : glasses with varying concentrations of . (c) Photoluminescence spectra of glasses codoped with and recorded at room temperature . Inset shows the comparison of photoluminescence spectra in NIR range of all the three series of glasses containing 6.0 mol % of .

Image of FIG. 6.
FIG. 6.

Comparison plot of emission spectra of three glasses , , and .

Image of FIG. 7.
FIG. 7.

Energy level diagram containing important transitions of and ions for one of the glasses containing 6.0 mol % .

Image of FIG. 8.
FIG. 8.

(a) Fluorescence decay curve of the sample recorded at room temperature corresponding to the emission line at 550 nm. (b) Fluorescence decay curve of the sample for the same transition. (c) Fluorescence decay curve of the sample recorded at room temperature corresponding to the emission line at 548 nm and inset shows the comparison of variation in energy transfer efficiency with concentration for green emission.

Tables

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Table I.

Physical parameters of : glasses.

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Table II.

The absorption band energies , the experimental , and calculated OSs for the absorption transitions of doped glasses.

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Table III.

The absorption band energies , the experimental , and calculated OSs for the absorption transitions of doped glasses.

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Table IV.

The summary of JO parameters .

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Table V.

Transition probability and branching ratios of and doped glasses.

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Table VI.

Calculated radiative lifetimes of and doped glasses.

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Table VII.

Data related to quantum efficiencies of the three principal lines for the glasses and .

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/content/aip/journal/jap/108/2/10.1063/1.3464257
2010-07-21
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of aluminum ions on fluorescent spectra and upconversion in codoped CaF2–Al2O3–P2O5–SiO2:Ho3+ and Er3+ glass system
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/2/10.1063/1.3464257
10.1063/1.3464257
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