| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1529246 | Materials Science and Engineering: B | 2013 | 4 Pages |
Long-lasting phosphors Ca2ZnSi2O7:Eu2+, Dy3+ are prepared by solid-state reaction method assisted with different fluxes. Broadband emission, peaked at 580 nm and originating from 4f to 5d transition of Eu2+, is observed. The emission intensities of the phosphors can be enhanced by 4.84 and 7.73 times with the introduction of H3BO3 and CaF2, respectively. Moreover, their afterglow times are also respectively prolonged to 11 h and 12 h. The yellow afterglow can be excited by both ultraviolet and visible light, thus permitting its application in both room and outdoor environment. In terms of the crystal structure and trap feature of the phosphors added with different fluxes, the mechanism for the improved luminescence and afterglow properties is discussed.
► Ca2ZnSi2O7:Eu2+, Dy3+ shows long-lasting yellow phosphorescence. It can be excited by UV and blue light, the main excitation peak is at 460 nm. ► Addition of H3BO3 and CaF2 make emission intensities of the phosphor enhanced by 4.84 and 7.73 times, respectively. ► At the same time, afterglow time of the phosphor doped with H3BO3 and CaF2 prolonged to 11 h and 12 h, respectively.
