Tunable luminescence and energy transfer properties in YVO<sub class="a-plus-plus">4sub>:Bi<sup class="a-plus-plus">3+sup>, Eu<sup class="a-plus-plus">3+sup> phosphors
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- 作者：Jiangang Su ; Xiaoyun Mi ; Jiacheng Sun ; Lixin Yang…
- 刊名：Journal of Materials Science
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：52
- 期：2
- 页码：782-792
- 全文大小：2,163 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Characterization and Evaluation Materials
Polymer Sciences
Continuum Mechanics and Mechanics of Materials
Crystallography
Mechanics - 出版者：Springer Netherlands
- ISSN：1573-4803
- 卷排序：52
文摘
In this paper, YVO<sub>4sub>:Bi3+, Eu3+ 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<sub>4sub>:Bi3+, Eu3+ monitoring at 622 nm was a broad band with major peak located at 280 nm. It contained the charge transfer from 2p orbit of O2−sup> to 4f orbit of Eu3+ (257 nm) and the absorbing from energy level transition of Bi3+ (1S<sub>0sub>→<sup>3P<sub>1sub>, 346 nm) and VO<sub>4sub>3−sup> (lA<sub>1sub>→<sup>1T<sub>2sub>, 286 nm and lA<sub>1sub>→<sup>1T<sub>1sub>, 320 nm) through gauss fitting. Upon excitation at a wavelength of 280 nm, the major emission peak of YVO<sub>4sub>:Bi3+, Eu3+ located at 622 nm (red) was attributed to the electric dipole transition 5D<sub>0sub>→<sup>7F<sub>2sub> of Eu3+. The energy transfer mechanism of Bi3+→Eu3+ was also studied to be dipole–quadrupole mechanism of electric multipole interaction, and the critical distance between Eu3+ and Bi3+ was calculated by concentration quenching method. The emission color of YVO<sub>4sub>:Bi3+, Eu3+ 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.