Cerium doped CaY₂Al₄SiO₁₂, CaY₂Ga₂Al₂SiO₁₂ and CaY₂Sc₂Al₂SiO₁₂ garnet phosphors have been synthesized by using a high temperature solid-state reaction method and studied by optical spectroscopy techniques in the wide temperature range. It has been revealed that the emission spectra from all the synthesized samples can be well represented as the sum of spectral bands due to the 5d - 4f transitions of two optical Ce³⁺ centers having different local environment. It is proposed that these two centers arise due to various types of distortions caused by crystal chemical differences between calcium and yttrium ions located at the dodecahedral crystallographic site in the garnet structure. Such a dual-mode distortion site leads to increasing the Stokes shift of Ce³⁺ emission spectra for the studied garnets in comparison with YAG:Ce³⁺. The phosphor CaY₂Al₄SiO₁₂:Ce³⁺ shows a weak blue shift of Ce³⁺ luminescence compared to YAG:Ce³⁺ and demonstrates excellent thermal stability on temperature quenching effects by manifesting the thermal quenching temperature T_1/2 at 635 K. Substitution of Al³⁺ by larger cations Ga³⁺ or Sc³⁺ has resulted in the additional blue shift of the luminescence spectrum and the appearance of strong thermal quenching.

铈掺杂的CaY ₂ Al ₄ SiO ₁₂，CaY ₂ Ga ₂ Al ₂ SiO ₁₂和CaY ₂ Sc ₂ Al ₂ SiO ₁₂石榴石荧光粉是利用高温固态反应方法合成的，并通过光谱学技术进行了广泛的研究。温度范围。已经发现，由于两个光学Ce ³⁺的5d-4f跃迁，所有合成样品的发射光谱可以很好地表示为光谱带的总和。中心具有不同的本地环境。提出这两个中心的产生是由于位于石榴石结构的十二面体晶体学位置上的钙和钇离子之间的晶体化学差异引起的各种类型的畸变。与YAG：Ce ³⁺相比，这种双模畸变位点导致所研究的石榴石的Ce ³⁺发射光谱的斯托克斯位移增加。与YAG：Ce ³⁺相比，磷光体CaY ₂ Al ₄ SiO ₁₂：Ce ³⁺显示出Ce ³⁺发光的弱蓝移。并通过 在635 K处显示热淬火温度T _1/2表现出对温度淬火效果的出色热稳定性。较大的阳离子Ga ³⁺或Sc ³⁺取代Al ³⁺导致发光光谱的额外蓝移和热淬火的外观。