Back to Search
Start Over
Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping
- Source :
- Journal of Solid State Chemistry
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- This paper demonstrates the effects of Li+ co-doping on the structure, morphology, and luminescence properties of GdVO4:Er3+/Yb3+ phosphor prepared using a high-temperature solid-state chemistry method. The GdVO4:Er3+/Yb3+ powders synthesized with the Li+ co-dopant (in concentrations of 0, 5, 10, and 15 mol%) are characterized by X-ray powder diffraction, scanning electron microscopy, and photoluminescence spectroscopy. Structural analysis showed that powders co-doped with Li+ have larger crystallite sizes and slightly smaller crystal lattice parameters than powders prepared without Li+ ions. Photoluminescence down-conversion (345-nm excitation) and up-conversion (980-nm excitation) spectra show characteristic Er3+ emissions, with the most intense bands peaking at 525 nm (H-2(11/2) - GT I-4(15/2) transition) and 552 nm (S-4(3/2) - GT I-4(15/2)). The intensity of up-conversion emission from GdVO4:Er3+/Yb3+ is enhanced (by a factor of four) by co-doping with 5 mol% of Li+ ions. The mechanisms responsible for this emission enhancement are discussed. (C) 2014 Elsevier Inc. All rights reserved.
- Subjects :
- Photoluminescence
Materials science
Li+ co-doping
Scanning electron microscope
Analytical chemistry
Phosphor
02 engineering and technology
Crystal structure
Up-conversion
010402 general chemistry
01 natural sciences
Inorganic Chemistry
Orthovanadate
Materials Chemistry
Physical and Theoretical Chemistry
Spectroscopy
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
3. Good health
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Crystallite
0210 nano-technology
Luminescence
Powder diffraction
Subjects
Details
- ISSN :
- 00224596
- Volume :
- 217
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Chemistry
- Accession number :
- edsair.doi.dedup.....79aaa2492b05063b8f6a72f3468dc874