Er,Yb∶(LaLu)_2O_3透明陶瓷制备及上转换发光性能

Preparation of Er,Yb∶( La Lu)_2O_3 Ceramic and Its Upconversion Luminescent Properties

采用柠檬酸燃烧法制备Er,Yb∶(La Lu)_2O_3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)_2O_3。采用冷等静压-真空烧结法制备了Er,Yb∶(La Lu)_2O_3和Er∶(La Lu)_2O_3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%Yb^(3+)和10%La^(3+)样品的上转换发光强度与未掺Yb^(3+)、La^(3+)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Er^(3+)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Er^(3+)-Yb^(3+)的能量传递过程及其上转换发光机制。

Er,Yb∶(LaLu)2O 3 ceramic powders were prepared via citric combustion method.XRD patterns show that the production prepared at 1 000℃is pure phase of(LaLu)2O 3.Er,Yb∶(LaLu)2O 3 and Er∶(LaLu)2O 3 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%Yb 3+and 10%La 3+are doped in the ceramic compared with the samples without Yb 3+and La 3+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 Er 3+,respectively.The energy transfer process and upconversion luminescence mechanism of Er 3+-Yb 3+in co-doped system were studied.