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<table>(a) Photoluminescence emission spectra of Eu-doped silica nanopowders and (b) variation of PL maximum intensity with an increase in Eu concentrations.</table>

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Figure 3: Luminescence Properties of Eu- and Mg-Codoped Sol-Gel <svg style="vertical-align:-4.50008pt;width:43.474998px;" id="M1" height="21.0375" version="1.1" viewBox="0 0 43.474998 21.0375" width="43.474998"  xmlns="http://www.w3.org/2000/svg">
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Luminescence Properties of Eu- and Mg-Codoped Sol-Gel Glasses