Er,Yb：(LaLu)2O3透明陶瓷制备及上转换发光性能

采用柠檬酸燃烧法制备Er，Yb：（LaLu）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（LaLu）₂O₃。采用冷等静压-真空烧结法制备了Er，Yb：（LaLu）₂O₃和Er：（LaLu）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。

Preparation of Er,Yb: (LaLu)2O3 Ceramic and Its Upconversion Luminescent Properties

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 (LaLu)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.