| Roles of Eu^2＋, Dy^3＋ Ions in Persistent Luminescence of Strontium Aluminates Phosphors |
| |
| 引用本文： | 吕兴栋. Roles of Eu^2＋, Dy^3＋ Ions in Persistent Luminescence of Strontium Aluminates Phosphors[J]. 武汉理工大学学报(材料科学英文版), 2008, 23(5): 652-657. DOI: 10.1007/s11595-007-5652-7 |
| |
| 作者姓名： | 吕兴栋 |
| |
| 作者单位： | Academy of Functional Materials, Jiangxi University of Finance and Economy, Nanchang 330013, China |
| |
| 基金项目： | Funded by Jiangxi University of Finance and Economy and Jlangxi Provincial Department of Education （No.[2007]260） |
| |
| 摘 要： | The polycrystalline Eu^2＋ and Dy ^3＋ co-doped strontium aluminates SrAl2O4： Eu^2＋, Dy^3＋ 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 Eu^2＋ ion in SrAl2O4： Eu^2＋, Dy^3＋ phosphors works as not only the UV-excited luminescent center but also the persistent luminescent center. The doped Dy^3＋ ion can hardly yield any luminescence under UV-excitation, but effectively enhance the persistent luminescence and thermo-luminescence of SrAl2O4： Eu^2＋. Dy^3＋ 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.
|
| 关 键 词： | 铝酸锶 磷光体 持续发光 稀土金属 铕 镝 |
| 收稿时间： | 2006-06-04 |
Roles of Eu2+, Dy3+ ions in persistent luminescence of strontium aluminates phosphors |
| |
| Lü Xingdong,Minjuan Zhong,Renqin Wang. Roles of Eu2+, Dy3+ ions in persistent luminescence of strontium aluminates phosphors[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2008, 23(5): 652-657. DOI: 10.1007/s11595-007-5652-7 |
| |
| Authors: | Lü Xingdong Minjuan Zhong Renqin Wang |
| |
| Affiliation: | (1) Academy of Functional Materials, Jiangxi University of Finance and Economy, Nanchang, 330013, China |
| |
| 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.
Funded by Jiangxi University of Finance and Economy and Jiangxi Provincial Department of Education (No.[2007]260) |
| |
| Keywords: | strontium aluminate persistent luminescence thermo-luminescence rare earth ion |
| 本文献已被 维普 SpringerLink 等数据库收录！ |
|
