Journal
VACUUM
Volume 188, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2021.110215
Keywords
LaMgAl11O19; Dy3+; Yellow phosphors; Luminescent properties
Funding
- National Natural Science Foundation of China [51872286, 51832007, 51472240, 61675204]
- Science and Technology Plan Leading Project of Fujian Province [2018H0046, 2020H0036]
- State Key Laboratory of Solidification Processing (Northwestern Polytechnical University) [SKLSP201908]
- National Key Research and Development Program of China [2016YFB0701002]
- Strategic Priority Research Programs of the Chinese Academy of Science [XDB20010200]
- Natural Science Foundation of Jiangxi Province [20181BAB211009]
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A series of Dy3+-doped LaMgAl11O19 (Dy: LMA) phosphors were prepared and characterized, showing intense yellow emissions at 573 nm under the excitation of 449 nm. The optimal doping concentration of Dy3+ in LMA was confirmed to be 4 at.%, with CIE 1931 chromaticity coordinates located in the yellow region. The mechanism of concentration quenching of Dy3+ in LMA was discussed.
A series of Dy3+-doped LaMgAl11O19 (Dy: LMA) phosphors were prepared by the solid state reaction method. The band structure and density of states of LaMgAl11O19 were calculated. The crystalline structures were investigated by X-ray diffraction and transmission electron microscopy. The chemical elements of Dy: LMA phosphors were characterized by energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. All the Dy: LMA phosphors exhibit intense yellow emissions at 573 nm under the excitation of 449 nm. Based on the measured absorption, emission spectra and the fluorescence decay curves, as well as the discussion and comparison of their spectral parameters, the optimal doping concentration of Dy3+ in LMA is confirmed to be 4 at.%. The Com-mission International del-Eclairage (CIE) 1931 chromaticity coordinates of all the samples were located in the yellow region. The mechanism of concentration quenching of Dy3+ in LMA was discussed.
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