The undoped YVO 4 and Ce 3+ -doped YVO 4 single 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 YVO 4 crystalline phase without any parasitic phases. The optical properties of Ce 3+ -doped YVO 4 single crystals with different doping concentrations were investigated via a combination of absorption, emission, and excitation spectra. Dependence of luminescence and absorption intensity on Ce 3+ doping concentration was discussed at different excitation wavelengths. The typical transitions of Ce 3+ ions and the unusual intrinsic luminescent phenomena of VO43−{\text{VO}}_{4}^{3-} groups were observed and investigated in Ce 3+ -doped YVO 4 crystals. 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 Ce 3+ ions. In addition, the CIE chromaticity coordinates and correlated color temperature were calculated on a basis of emission spectra under different excitation wavelengths.

中文翻译：

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掺Ce3 +的YVO4单晶的光致发光特性和能量转移现象

通过Czochralski法在中频感应炉中成功地生长了未掺杂的YVO 4和Ce 3+掺杂的YVO 4单晶。X射线衍射图证明所有样品均显示纯四方YVO 4结晶相，无任何寄生相。通过吸收，发射和激发光谱的组合，研究了具有不同掺杂浓度的Ce 3+掺杂YVO 4单晶的光学性质。讨论了不同激发波长下发光和吸收强度对Ce 3+掺杂浓度的影响。在掺Ce 3+的YVO 4晶体中观察和研究了Ce 3+离子的典型跃迁和VO43-{\ text {VO}} _ {4} ^ {3-}基团的异常固有发光现象。在确定相应的过渡态，分析发光机理以及揭示从VO43-{\ text {VO}} _ {4} ^ {3-}到Ce 3+离子的能量转移方面，人们给予了更多的关注。另外，基于在不同激发波长下的发射光谱，计算了CIE色度坐标和相关色温。