Back to Search
Start Over
Trap depth and color variation of Ce3+-Cr3+ co-doped Gd3(Al,Ga)5O12 garnet persistent phosphors
- Source :
- Optical Materials. 62:171-175
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Persistent luminescent properties in Ce3+-Cr3+ codoped Gd3Al5−xGaxO12 garnet (GAGG:Ce-Cr) solid solution have been investigated. The persistent luminescent color is shifted from orange to yellowish green with increasing Ga content because Ce3+: 5d level splitting becomes much weaker. The depth of electron trap introduced by Cr codoping was estimated from the intense thermoluminescence glow peak by the initial rise method. The trap depth decreases from 0.56 eV to 0.29 eV with increasing Ga content. The shift can be explained by downshift of bottom of conduction band. From the persistent luminescence decay curve measurement after ceasing 450 nm blue illumination, the samples with x = 2.5 exhibited the longest persistent luminescence for 405 min until the luminance becomes 2 mcd/m2 in GAGG:Ce-Cr phosphors.
- Subjects :
- Materials science
Analytical chemistry
chemistry.chemical_element
Phosphor
02 engineering and technology
01 natural sciences
Thermoluminescence
Inorganic Chemistry
Optics
Persistent luminescence
0103 physical sciences
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Spectroscopy
010302 applied physics
business.industry
Organic Chemistry
021001 nanoscience & nanotechnology
Penning trap
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Cerium
chemistry
Crystal field theory
0210 nano-technology
Luminescence
business
Solid solution
Subjects
Details
- ISSN :
- 09253467
- Volume :
- 62
- Database :
- OpenAIRE
- Journal :
- Optical Materials
- Accession number :
- edsair.doi...........ab27761fa48e41314165d7385a9035fd