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Absorption spectra of the Mn2+/Eu3+-co-doped phosphate glasses in the 300-800 nm wavelength region.
Excitation spectra monitored at 612 nm of the Mn2+-doped, Eu3+-doped, and Mn2+/Eu3+-co-doped phosphate glass.
Emission spectra of the Mn2+-doped and ME4 samples under the xenon lamp, the inset is the intensity dependent on the concentration of the Eu3+ ions.
Emission spectra of the ME4 sample under 361, 380, 392, 408, 476, and 523 nm excitation, respectively; the photo is the emission of the ME4 sample under the illumination of the sunlight.
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