| Autor: |
Wang, Shuai, Wang, Pengfei, Ruan, Yongfeng, Wang, Youfa, Zhang, Shouchao |
| Zdroj: |
Science and Engineering of Composite Materials; February 2021, Vol. 28 Issue: 1 p205-214, 10p |
| Abstrakt: |
The undoped YVO4and Ce3+-doped YVO4single crystals have been successfully grown by the Czochralski method in a medium frequency induction furnace. The X-ray diffraction patterns testified that all samples exhibited the pure tetragonal YVO4crystalline phase without any parasitic phases. The optical properties of Ce3+-doped YVO4single crystals with different doping concentrations were investigated via a combination of absorption, emission, and excitation spectra. Dependence of luminescence and absorption intensity on Ce3+doping concentration was discussed at different excitation wavelengths. The typical transitions of Ce3+ions and the unusual intrinsic luminescent phenomena of VO43−{\text{VO}}_{4}^{3-}groups were observed and investigated in Ce3+-doped YVO4crystals. More attentions were paid to ascertaining the corresponding transition states, analyzing luminescent mechanism, and revealing the energy transfer from VO43−{\text{VO}}_{4}^{3-}to Ce3+ions. In addition, the CIE chromaticity coordinates and correlated color temperature were calculated on a basis of emission spectra under different excitation wavelengths. |
| Databáze: |
Supplemental Index |
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