Abstract
This work provides a scheme to investigate the site occupancy and the luminescence properties of lanthanide ions in BaY2Si3O10. The Rietveld refinement of the samples indicates that the lanthanide ions preferably occupy the Y3+ sites in BaY2Si3O10. It is confirmed that valence state of lanthanide ions is stable at +3 in all doping samples. The site-dependent spectroscopic properties of Ce3+ and Eu3+ are studied in VUV-UV-vis spectral region at low temperatures, and the polarization effect on Ce3+ luminescence decay is evaluated. The results indicate that the lanthanide ions experience the similar polarization effect when substituting the Y3+ sites in BaY2Si3O10. The Stokes shift of Ce3+ luminescence becomes larger as Ce3+ doping content increases. Eu3+ f-f line-shape change has not been observed in the spectra as Eu3+ content increases. It demonstrates that the change of the electrostatic binding effect in the lattice has little effect on the ligand polarization of the central lanthanide ion. Finally, a mechanism is proposed to explain why the thermal-quenching of Ce3+ luminescence is negligible in BaY2Si3O10 even if the temperature increases up to 500 K. The influence of dynamic ion-lattice interaction on luminescence properties of the lanthanide ions in BaY2Si3O10 is discussed in detail.
Original language | English |
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Pages (from-to) | 7421-7431 |
Number of pages | 11 |
Journal | Journal of Physical Chemistry C |
Volume | 122 |
Issue number | 13 |
DOIs | |
State | Published - Apr 5 2018 |
Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- General Energy
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films