| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5397848 | Journal of Luminescence | 2017 | 7 Pages |
Abstract
This work concerns the optical properties of alkaline earth yttrium apatites according to the composition AE2Y8Si6O26 (AE=Mg, Ca, Sr) doped with Eu3+, which are materials of interest for LED applications. Using a multistep preparation route, which includes hydrothermal synthesis of precursors for solid state reaction, ceramic samples were prepared and their structural and optical properties characterised. More particularly, this work relates to site-selective spectroscopy, since the compounds comprise two distinguishable crystallographic sites within the host structure, where Eu3+ can be substituted. It also describes the temperature dependent photoluminescence, which thermal quenching temperature (T1/2) for Sr2Y8Si6O26:Eu3+ and Ca2Y8Si6O26:Eu3+ is in the range of 561Â K and 591Â K respectively, whereas Mg2Y8Si6O26:Eu3+ shows bi-sigmoidal quenching behaviour in the range between 210 and 452Â K.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
T. Jansen, T. Jüstel, M. Kirm, H. Mägi, V. Nagirnyi, E. Tõldsepp, S. Vielhauer, N.M. Khaidukov, V.N. Makhov,