【摘要】 采用柠檬酸燃烧法制备Er,Yb∶（La Lu）₂O₃陶瓷粉体,用X射线衍射对其进行了物相鉴定,研究表明1 000℃时已经得到纯相的（La Lu）₂O₃。采用冷等静压-真空烧结法制备了Er,Yb∶（La Lu）₂O₃和Er∶（La Lu）₂O₃陶瓷,对陶瓷的结构和光谱性能进行了详细的研究,研究发现掺杂5%Yb³⁺和10%La³⁺样品的上转换发光强度与未掺Yb³⁺、La³⁺样品相比明显增大,根据上转换光谱显示较强发射峰位于564 nm和661 nm处,对应Er³⁺的⁴S_3/2(²H_11/2)→⁴I_15/2能级跃迁和⁴F_9/2→⁴I_15/2能级跃迁,并讨论了Er³⁺-Yb³⁺的能量传递过程及其上转换发光机制。更多还原

【Abstract】 Er,Yb∶（LaLu）₂O₃ ceramic powders were prepared via citric combustion method. XRD patterns show that the production prepared at 1 000 ℃ is pure phase of（La Lu）₂O₃. Er,Yb ∶（LaLu）₂O₃ and Er∶（LaLu）₂O₃ ceramic was synthesized by cold isostatic-vacuum sintering method.The structural and spectroscopic properties of the ceramics were investigated in detail. The upconversion emission increases obviously when 5% Yb³⁺ and 10% La³⁺ are doped in the ceramic compared with the samples without Yb³⁺ and La³⁺ doping. The upconversion fluorescence spectra show that the intense green and red emissions located at around 564 nm and 661 nm are attributed to the radiant transitions of ⁴S_3/2(²H_11/2) →⁴I_15/2 and ⁴F_9/2→⁴I_15/2 of Er³⁺ ,respectively. The energy transfer process and upconversion luminescence mechanism of Er³⁺ -Yb³⁺ in co-doped system were studied.更多还原