Photoluminescent Layered Y(III) and Tb(III) Silicates Doped with Ce(III)
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- 作者：Mariya H. Kostova ; Rute A. Sá ; Ferreira ; Duarte Ananias ; Luí ; s D. Carlos ; Joã ; o Rocha
- 刊名：Journal of Physical Chemistry B
- 出版年：2006
- 出版时间：August 10, 2006
- 年：2006
- 卷：110
- 期：31
- 页码：15312 - 15316
- 全文大小：225K
- 年卷期：v.110,no.31(August 10, 2006)
- ISSN：1520-5207
文摘
The synthesis and structural characterization of new layered rare-earth silicates K3[M1-aCeaSi3O8(OH)2], M= Y3+, Tb3+, a 
1 (AV-22 materials), have been reported. These materials combine the properties of layeredsilicates, such as intercalation chemistry, and photoluminescence and may find applications in new types ofsensor devices. For mixed Tb/Ce-AV-22, evidence has been found for the energy transfer from the largeCe3+ 4f 1 
5d1 broad band to the sharp Tb3+ 4f 8 lines. This energy transfer allows the fine-tuning of thecolor emission in the blue-green region of the chromaticity diagram. Upon Ce3+ excitation (342 nm), theradiance of Tb/Ce-AV-22 is approximately 2 times higher than that measured under direct Tb3+ excitation,which reinforces the existence of effective room-temperature Ce3+-to-Tb3+ energy transfer.
1 (AV-22 materials), have been reported. These materials combine the properties of layeredsilicates, such as intercalation chemistry, and photoluminescence and may find applications in new types ofsensor devices. For mixed Tb/Ce-AV-22, evidence has been found for the energy transfer from the largeCe3+ 4f 1 5d1 broad band to the sharp Tb3+ 4f 8 lines. This energy transfer allows the fine-tuning of thecolor emission in the blue-green region of the chromaticity diagram. Upon Ce3+ excitation (342 nm), theradiance of Tb/Ce-AV-22 is approximately 2 times higher than that measured under direct Tb3+ excitation,which reinforces the existence of effective room-temperature Ce3+-to-Tb3+ energy transfer.