Journal
JOURNAL OF LUMINESCENCE
Volume 211, Issue -, Pages 114-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2019.03.034
Keywords
Double-perovskite; Red-emitting phosphor; Molten salt synthesis
Categories
Funding
- National Natural Science Foundation of China [21701067]
- Natural Science Foundation of Jiangxi Province of China [20171BBB216016]
- Educational Commission of Jiangxi Province of China [GJJ160647]
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A series of Mn4+ doped La2MgTiO6 red-emitting materials with double-perovskite structure and high efficient red emission have been successfully prepared by molten salt assisted method which LiCl acting as molten salt at a relatively low temperature. The effects of the reaction temperature and the usage amounts of LiCl on the structure and photoluminescence properties of phosphors were studied. Experimental results indicate that the synthesis temperature of the Mn4+-doped La2MgTiO6 by molten salt method is only 800 degrees C while the traditional solid phase method requires 1350 degrees C. The morphology and particle size of phosphors can be well controlled by adjusting the reaction temperature and the amount of molten salt. The thermal stability and quenching mechanism of phosphors were studied by temperature dependent emission spectra, which demonstrated that LiCl is benefit to improve the thermal stability of the Mn4+ activated La2MgTiO6 phosphors.
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