| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1877501 | Applied Radiation and Isotopes | 2016 | 6 Pages |
•Energy transfer from Bi3+/Tb3+ to Eu3+ in Li6Gd(BO3)3 are discussed in detail.•The emission intensity can be greatly enhanced with Bi3+/Eu3+ co-doped.•Tunable color from green to orange red can be obtained for Tb3+/Eu3+ co-doped.
Bi3+/Tb3+, Eu3+ co-doped Li6Gd(BO3)3 (LGBO) phosphors were synthesized via a traditional solid-state method. Phase purity was investigated using X-ray diffraction, absorption strength of the phosphors were investigated by UV–vis absorption spectra, and the photoluminescence properties of the phosphors were studied systematically. Results showed that the emission intensity of Bi3+, Eu3+ co-doped LBOG was 2.76 times higher than that of Eu3+-doped LGBO irradiated at 275 nm, thereby implying the possibility of energy transfer from Bi3+ to Eu3+. The excitation spectra of Tb3+, Eu3+ co-doped LGBO phosphors are broader in comparison with single-doped phosphors and show tunable colors from green to yellow to orange-red when the ratio of Tb3+ to Eu3+ is adjusted These results demonstrate that LGBO:Tb3+, Eu3+ phosphors have potential use in light-emitting diodes.
Graphical abstractThe color tones of Eu3+, Tb3+ coactivated LGBO phosphors gradually change from green to yellow to orange-red by adjustment of the Tb3+ to Eu3+ ratio.Figure optionsDownload full-size imageDownload as PowerPoint slide
