The researches on cyan phosphors those can be effectively excited by near-ultraviolet (NUV) light are being hot topics lately because that they have potential applications in phosphor converted white light emitting diodes (pc-WLEDs) based on the NUV chips. In this work, Bi³⁺/Dy³⁺ doped Ca₂LaTaO₆ phosphors were prepared through a solid state reaction procedure, and their luminescence characteristics were investigated through the measurements of the luminescence spectra and the decay curves. The excitation spectra indicate that the Bi³⁺ or Dy³⁺ single doped and Bi³⁺/Dy³⁺ codoped Ca₂LaTaO₆ phosphors are suitable for NUV excitation due to the excitation spectra within 250–500 nm. The emission spectra show that the lights of Bi³⁺/Dy³⁺ codoped Ca₂LaTaO₆ phosphors locate in cyan region. The ptotoluminescence characteristics indicate that they have possible uses in pc-WLEDs based on NUV chips.

近紫外（NUV）光能有效激发的青色荧光粉在基于NUV芯片的荧光粉转换白光发光二极管（pc-WLEDs）中具有潜在的应用前景，是近来的研究热点。本工作采用固态反应法制备了Bi ³⁺ /Dy ³⁺掺杂Ca ₂ LaTaO ₆荧光粉，并通过对发光光谱和衰减曲线的测量研究了其发光特性。激发光谱表明Bi ³⁺或Dy ³⁺单掺杂和Bi ³⁺ /Dy ³⁺共掺杂Ca ₂ LaTaO ₆由于激发光谱在 250-500 nm 内，荧光粉适用于 NUV 激发。发射光谱表明Bi ³⁺ /Dy ³⁺共掺杂Ca ₂ LaTaO ₆荧光粉的光位于青色区域。光致发光特性表明它们可能用于基于 NUV 芯片的 pc-WLED。