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Near-infrared emission from Eu–Yb doped silicate glasses subjected to thermal reduction
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10.1063/1.3556316
/content/aip/journal/apl/98/7/10.1063/1.3556316
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/7/10.1063/1.3556316
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Energy level diagram of and showing the mechanism for the cooperative energy transfer from a UV-excited ion to two ions that relax by NIR emission.

Image of FIG. 2.
FIG. 2.

Emission spectra of the singly doped Eu glasses under 325 nm excitation at room temperature. Spectra of both as-prepared and various heat-treated glasses are shown. The broad peak around 350–500 nm is ascribed to , whereas the sharp peaks from 575 to 725 nm are ascribed to . Inset: area under the broad peak as a function of heat-treatment temperature .

Image of FIG. 3.
FIG. 3.

Emission spectra of the codoped Eu–Yb glasses under 325 nm excitation at room temperature. Spectra of both as-prepared and various heat-treated glasses are shown. The broad peak around 350–500 nm is ascribed to , the sharp peaks from 575 to 725 nm to , and the peaks in the NIR region to . Inset (a): excitation spectrum monitored at 985 nm of the as-prepared codoped Eu–Yb glass (solid curve) and the same glass heat-treated at (dashed curve). Inset (b): luminescence decay curves of emission under 325 nm excitation of Eu and Eu–Yb doped glasses heat-treated at .

Image of FIG. 4.
FIG. 4.

(a) SNMS depth profile of the codoped Eu–Yb glass heat-treated at . The curves are plotted as concentration of the element at a given depth divided by the concentration of the same element in the bulk of the glass . Inset: depth of calcium diffusion (closed squares) and Vickers hardness (open squares) as a function of heat-treatment temperature . of the as-prepared glass is . (b) XPS spectra of O from the as-prepared and heat-treated codoped Eu–Yb glasses. The solid lines are the experimental data, whereas the dashed and dashed-dotted lines are the fit to the BO and NBO components, respectively. The peaks were deconvoluted using Gaussian functions.

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/content/aip/journal/apl/98/7/10.1063/1.3556316
2011-02-16
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near-infrared emission from Eu–Yb doped silicate glasses subjected to thermal reduction
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/7/10.1063/1.3556316
10.1063/1.3556316
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