Rare earth co-activated CeO₂ phosphors are synthesized via hydrothermal process. Tb³⁺ and Yb³⁺ ions are deliberately incorporated in CeO₂ host to convert high-energy photons into two near infrared photons with low energy for quantum cutting applications. The observed broad excitation ranging from 260-300 nm is associated with f-d transitions of Tb³⁺ ions. A strong green emission at 540 nm for Tb³⁺ ions along with typical Yb³⁺ emission band ranging from 950-1100 nm are observed under UV excitation. The PL intensity of Tb³⁺ ions starts to reduce with increase in Yb³⁺ emission as Yb³⁺ concentration increased, indicating an efficient energy transfer from Tb³⁺ to Yb³⁺. Photoluminescence decay times of CeO₂:Tb³⁺/Yb³⁺ phosphors show reduction in lifetime from 2.32 – 0.83 ms with elevation of Yb³⁺ concentration from 0 to 12.5 mol%. Obtained results reveal the suitability of present phosphors in near-infrared quantum cutting applications.

通过水热法合成了稀土共活化的CeO ₂荧光粉。在CeO ₂基质中故意掺入Tb ³⁺和Yb ³⁺离子，以将高能光子转换为两个低能的近红外光子，用于量子切割应用。观察到的从260-300 nm范围内的宽激发与Tb ³⁺离子的fd跃迁有关。在紫外线激发下，观察到Tb ³⁺离子在540 nm处有很强的绿色发射，以及典型的Yb ³⁺发射带在950-1100 nm范围内。Tb的PL强度³⁺离子开始减少与增加的Yb ³⁺发射诸如Yb ³⁺浓度增加，表明从Tb ³⁺到Yb ³⁺的有效能量转移。CeO ₂：Tb ³⁺ / Yb ³⁺荧光粉的光致发光衰减时间显示出寿命从2.32 – 0.83 ms降低，而Yb ³⁺浓度从0升高到12.5 mol％。所得结果揭示了当前的磷光体在近红外量子切割应用中的适用性。