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Green emission from Tb-doped SrSi2O2N2 phosphors under ultraviolet light irradiation
- Source :
-
Journal of Physics & Chemistry of Solids . Apr2011, Vol. 72 Issue 4, p233-235. 3p. - Publication Year :
- 2011
-
Abstract
- Abstract: Tb-doped SrSi2O2N2 phosphors with promising luminescent properties were synthesized by the conventional solid-state reaction method, characterized by powder X-ray diffraction and studied by photoluminescence excitation and emission spectra. The synthesized materials exhibited a weak blue emission and a strong green emission in the region of 400–470nm and 480–650nm, which are attributed to 5D3→7F j (j=5, 4, 3) and 5D4→7Fj (j=6, 5, 4, 3) transitions of Tb3+, respectively. The green emission from 5D4→7F5 at 543nm showed the highest intensity under the optimized concentration of 0.1mol, after which the quenching concentration became relevant. The quenching behavior of the emission of Tb3+ was explained by the cross-relaxation of its excited state. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00223697
- Volume :
- 72
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Physics & Chemistry of Solids
- Publication Type :
- Academic Journal
- Accession number :
- 59188339
- Full Text :
- https://doi.org/10.1016/j.jpcs.2011.01.009