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Photoluminescence investigations of (Y1− x Ln x )3Al5O12:Ce (Ln3+=Gd3+, La3+) nanophosphors
- Source :
-
Physica B . May2008, Vol. 403 Issue 10/11, p1678-1681. 4p. - Publication Year :
- 2008
-
Abstract
- Abstract: (Y1− x Ln x )3Al5O12:Ce (Ln3+=Gd3+, La3+) phosphors were synthesized by in situ esterification. The effects of Gd3+ and La3+ ions on structure and luminescence of YAG:Ce were investigated. For Gd3+-doped YAG:Ce, when doping concentration increased beyond 50mol%, GdAlO3 phase appeared. For La3+-doped YAG:Ce, as doping concentration increased beyond 20mol%, YAG phase completely disappeared and LaAlO3 phase emerged. As the doping concentration of Gd3+ and La3+ increased, the maximum emission band showed red shift. Because radii of Gd3+ and La3+ were larger than that of Y3+, Gd3+ and La3+ replacement distorted YAG structure. More defects are formed in (Y1− x Ln x )3Al5O12:Ce, which acts as quenching center. Therefore, emission intensity of (Y1− x Ln x )3Al5O12:Ce was lower than YAG:Ce and luminescent lifetime of (Y1− x Ln x )3Al5O12:Ce was shorter than YAG:Ce. [Copyright &y& Elsevier]
- Subjects :
- *PHOTOLUMINESCENCE
*PROPERTIES of matter
*NANOPARTICLES
*ESTERIFICATION
Subjects
Details
- Language :
- English
- ISSN :
- 09214526
- Volume :
- 403
- Issue :
- 10/11
- Database :
- Academic Search Index
- Journal :
- Physica B
- Publication Type :
- Academic Journal
- Accession number :
- 31404483
- Full Text :
- https://doi.org/10.1016/j.physb.2007.09.084