Effect of Gd3+/Ce3+ on Photosensitization of Tb3+Doped Fluorine Oxide Glass
Gd/Tb、Gd/Ce、Gd/Ce/Tb doped SiO2-B2O3-BaF2 fluorine oxide glass was prepared by high temperature melting method.The phase of fluorine oxide glass was determined by X-ray diffraction spectrum.The luminescence properties of Tb3+doped with different Gd2O3 content were studied by the fluorescence spectra of Tb3+under different excitation bands,and the more accurate numerical range of optimal Gd2O3 content was determined.Gd/Ce/Tb co-doped fluorine oxide glass was prepared by changing the atmosphere.The sensitization of Gd3+and Ce3+to Tb3+was studied.The results show that the prepared fluorine oxide glass has a stable glassy state.Both Gd3+and Ce3+sensitize the luminescence of Tb3+,and the sensitization effect is most significant when Gd2O3 content is 7％(molar fration,the same below)compared with other content,and quenching occurs when Gd2O3 content exceeds 7％.Cerium can coexist in Ce3+and Ce4+valence states in Ce2O3 doped glass,and it is easier to maintain Ce3+state when doped in reducing atmosphere than in air atmosphere.Moreover,Ce3+sensitizes the luminescence of Tb3+,while Ce4+inhibites the luminescence of Tb3+.
luminescence property of Tb3+Gd/Ce/Tb-dopingvalence state of Ce3+/Ce4+fluorine oxide glassenergy transfer
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