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Roles of Eu2+, Dy3+ ions in persistent luminescence of strontium aluminates phosphors
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xing-Dong, Lü Zhong, Minjuan Wang, Renqin |
| Copyright Year | 2008 |
| Abstract | The polycrystalline Eu2+ and Dy3+ co-doped strontium aluminates SrAl2O4: Eu2+, Dy3+ with different compositions were prepared by solid state reactions. The UV-excited photoluminescence, persistent luminescence and thermo-luminescence were studied and compared. Results show that the doped Eu2+ ion in SrAl2O4: Eu2+, Dy3+ phosphors works as not only the UV-excited luminescent center but also the persistent luminescent center. The doped Dy3+ ion can hardly yield any luminescence under UV-excitation, but effectively enhance the persistent luminescence and thermo-luminescence of SrAl2O4: Eu2+. Dy3+ co-doping can help form electron traps with appropriate depth due to its suitable electro-negativity, and increase the density and depth of electron traps. Based on above observations, a persistent luminescence mechanism, electron transfer model, is proposed and illustrated. |
| Starting Page | 652 |
| Ending Page | 657 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11595-007-5652-7 |
| Volume Number | 23 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s11595-007-5652-7 |
| Alternate Webpage(s) | https://doi.org/10.1007/s11595-007-5652-7 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
