In this article, the tunable-color emission properties of Ce³⁺/Eu³⁺ in NaY₉Si₆O₂₆ phosphors were reported. Ce³⁺ and Eu³⁺ ions had effectively incorporated the sites of Na⁺ and Y³⁺ ions, which were revealed by Rietveld refinements. The site occupation preference of Ce³⁺ in cationic sites were discussed. The energy transfer from Ce³⁺ to Eu³⁺ ion under the 312 nm excitation was ascribed to dipole-dipole interaction mechanism based on Dexter's energy transfer theory of multipolar interaction, which makes NaY₉Si₆O₂₆: Ce³⁺, Eu³⁺ produce tunable-color emission. Additionally, the temperature dependent emission spectra of the powders were studied. Temperature sensing performances were reflected by the fluorescence intensity ratio based on different temperature dependent variation tendency of Ce³⁺ and Eu³⁺ ions. The maximum values of the absolute and relative sensor sensitivities of NaY₉Si₆O₂₆: Ce³⁺, Eu³⁺ phosphors were about 0.0328 K⁻¹ and 0.95 % K⁻¹, respectively. Above all, NaY₉Si₆O₂₆: Ce³⁺, Eu³⁺ phosphors show a promising prospect for optical thermometer applications.

本文报道了NaY ₉ Si ₆ O ₂₆荧光粉中Ce ³⁺ / Eu ³⁺的可调色发射特性。Ce ³⁺和Eu ³⁺离子有效地结合了Na ⁺和Y ³⁺离子的位点，这由Rietveld精炼方法揭示。讨论了Ce ³⁺在阳离子位点中的位点占据偏好。在312 nm激发下，Ce ³⁺到Eu ³⁺离子的能量转移归因于基于Dexter多极相互作用的能量转移理论的偶极-偶极相互作用机理，这使得NaY ₉Si ₆ O ₂₆：Ce ³⁺，Eu ³⁺产生可调颜色的发射。另外，研究了粉末的温度依赖性发射光谱。基于Ce ³⁺和Eu ³⁺离子不同的温度依赖性变化趋势，荧光强度比反映了温度感应性能。NaY ₉ Si ₆ O ₂₆：Ce ³⁺，Eu ³⁺荧光粉的绝对和相对传感器灵敏度的最大值分别约为0.0328 K ^-1和0.95％K ^-1。最重要的是，NaY ₉ Si₆ O ₂₆：Ce ³⁺，Eu ³⁺荧光粉在光学温度计应用中显示出广阔的前景。