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- Title
Tunable luminescence and energy transfer properties in YVO:Bi, Eu phosphors.
- Authors
Su, Jiangang; Mi, Xiaoyun; Sun, Jiacheng; Yang, Lixin; Hui, Chunlong; Lu, Liping; Bai, Zhaohui; Zhang, Xiyan
- Abstract
In this paper, YVO:Bi, Eu phosphors have been synthesized by high-temperature solid-state method. The samples were characterized by X-ray powder diffraction, photoluminescence spectra, luminescence lifetime, and GSAS structure refinement. The excitation spectrum of YVO:Bi, Eu monitoring at 622 nm was a broad band with major peak located at 280 nm. It contained the charge transfer from 2 p orbit of O to 4 f orbit of Eu (257 nm) and the absorbing from energy level transition of Bi (S→P, 346 nm) and VO (A→T, 286 nm and A→T, 320 nm) through gauss fitting. Upon excitation at a wavelength of 280 nm, the major emission peak of YVO:Bi, Eu located at 622 nm (red) was attributed to the electric dipole transition D→F of Eu. The energy transfer mechanism of Bi→Eu was also studied to be dipole-quadrupole mechanism of electric multipole interaction, and the critical distance between Eu and Bi was calculated by concentration quenching method. The emission color of YVO:Bi, Eu can be tuned by the energy transfer of ions and the concentration of activator. In a word, the material has a good application prospects in the field of light-emitting diode under ultraviolet excitation.
- Subjects
ENERGY transfer; X-ray powder diffraction; PHOTOLUMINESCENCE; ELECTRIC dipole moments; LIGHT emitting diodes
- Publication
Journal of Materials Science, 2017, Vol 52, Issue 2, p782
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-016-0375-9