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Abstract:
In this study, fully concentrated Eu3+-based Na3Eu(VO4)(2)vanadate phosphor was synthesized by solid-state reaction process. The as-obtained product presented a single monoclinic phase with the space group ofCc(9) and rod shape with micron size, as revealed by X-ray diffraction pattern and scanning electron microscope. Their luminescence performances were investigated by the excitation and emission spectra, temperature-dependent photoluminescence spectra. At the excitation of 395 nm, they displayed a strong red emission at 620 nm and the Gd(3+)and La(3+)ions incorporation did not lead to luminescent quenching in this Na3Eu(VO4)(2)phosphor. When the temperature was as high as 420 K, the emission intensity kept 84% of the initial value at 303 K, which implied the Na3Eu(VO4)(2)phosphors had excellent thermal stability. Further, the activation energy (E-a) was calculated to be 0.326 eV. Meanwhile, the quantum yield of this phosphor was as high as 70.6%. Finally, by coating the mixtures of red phosphors Na3Eu(VO4)(2), commercial green phosphors (Sr, Ba)(2)SiO4:Eu(2+)and blue phosphors BaMgAl10O17:Eu(2+)on the surface of NUV chip (395 nm), a LED lamp was obtained and exhibited white light with good color rendering index of 93. These results exhibited the commercialized prospect of Na3Eu(VO4)(2)compound as a red phosphor in the field of solid-state lighting.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN: 0957-4522
Year: 2020
Issue: 15
Volume: 31
Page: 12872-12879
2 . 4 7 8
JCR@2020
2 . 8 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:196
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 2
SCOPUS Cited Count: 3
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: