Site Occupancies, Luminescence, and Thermometric Properties of LiY9(SiO4)6O2:Ce3+ Phosphors
- 4 October 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 55 (20), 10415-10424
- https://doi.org/10.1021/acs.inorgchem.6b01656
Abstract
In this work, we report the tunable emission properties of Ce3+ in an apatite-type LiY9(SiO4)6O2 compound via adjusting the doping concentration or temperature. The occupancies of Ce3+ ions at two different sites (Wyckoff 6h and 4f sites) in LiY9(SiO4)6O2 have been determined by Rietveld refinements. Two kinds of Ce3+ f-d transitions have been studied in detail and then assigned to certain sites. The effects of temperature and doping concentration on Ce3+ luminescence properties have been systematically investigated. It is found that the Ce3+ ions prefer occupying Wyckoff 6h sites and the energy transfer between Ce3+ at two sites becomes more efficient with an increase in doping concentration. In addition, the charge-transfer vibronic exciton (CTVE) induced by the existence of free oxygen ion plays an important role in the thermal quenching of Ce3+ at 6h sites. Because of the tunable emissions from cyan to blue with increasing temperature, the phosphors LiY9(SiO4)6O2:Ce3+ are endowed with possible thermometric applications.Funding Information
- National Natural Science Foundation of China (21171176, 21671201, U1232108, U1432249, U1632101)
- Natural Science Foundation of Guangdong Province (S2013030012842)
This publication has 55 references indexed in Scilit:
- Ab Initio Structure Determination and Photoluminescent Properties of an Efficient, Thermally Stable Blue Phosphor, Ba2Y5B5O17:Ce3+Chemistry of Materials, 2016
- Bandgap Tailoring via Si Doping in Inverse-Garnet Mg3Y2Ge3O12:Ce3+ Persistent Phosphor Potentially Applicable in AC-LEDACS Applied Materials & Interfaces, 2015
- Crystal Structure and Photoluminescence Evolution of La5(Si2+xB1–x)(O13–xNx):Ce3+ Solid Solution PhosphorsThe Journal of Physical Chemistry C, 2015
- New Ce3+-Activated Thiosilicate Phosphor for LED Lighting—Synthesis, Luminescence Studies, and ApplicationsACS Applied Materials & Interfaces, 2014
- New Yellow-Emitting Nitride Phosphor SrAlSi4N7:Ce3+ and Important Role of Excessive AlN in Material SynthesisACS Applied Materials & Interfaces, 2013
- Local Environments of Dilute Activator Ions in the Solid-State Lighting Phosphor Y3–xCexAl5O12Chemistry of Materials, 2013
- Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-dopingApplied Physics Letters, 2013
- Fundamental Limitations in the Performance of ${\rm Ce}^{3+}$–, ${\rm Pr}^{3+}$–, and ${\rm Eu}^{2+}$–Activated ScintillatorsIEEE Transactions on Nuclear Science, 2010
- Temperature Quenching of Yellow Ce3+ Luminescence in YAG:CeChemistry of Materials, 2009
- Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Structure, Photoluminescence, and Application in White LEDsChemistry of Materials, 2008