Luo Mengyan, Chen Baojiu, Li Xiangping, Zhang Jinsu, Xu Sai, Zhang Xizhen, Cao Yongze, Sun Jiashi, Zhang Yanqiu, Wang Xin, Zhang Yuhang, Gao Duan, Wang Li
School of Science, Dalian Maritime University, Dalian, Liaoning 116026, P. R. China.
Phys Chem Chem Phys. 2020 Nov 21;22(43):25177-25183. doi: 10.1039/d0cp04379f. Epub 2020 Oct 30.
Usually, the optical transition properties of trivalent rare earth (RE) ions in transparent hosts can be quantitatively investigated in the framework of Judd-Ofelt theory. A standard and commonly accepted calculation procedure based on the absorption spectrum has already been established. However, it is hard to assess the optical transition properties of trivalent RE ions doped in powdered and film materials owing to the difficulty in the absolute absorption spectrum measurements. In this work, we proposed a new route to calculate the Judd-Ofelt parameters of trivalent RE ion-doped materials in any morphological and shaped forms. In this method, the fluorescence decay values bridging the radiative transition rates and the Judd-Ofelt parameters were used. As an application example of the proposed Judd-Ofelt calculation method, the Judd-Ofelt parameters of Er in NaYF were calculated via the proposed route, and it was found that the obtained results are in reasonable accordance with those derived from other routes. It was also proved that this proposed Judd-Ofelt calculation method is a practicable and effective route for evaluating optical transition properties of trivalent RE ions in non-transparent hosts as long as the fluorescence decay values can be measured.
通常，透明基质中三价稀土（RE）离子的光学跃迁性质可在贾德 - 奥费尔特理论框架内进行定量研究。基于吸收光谱的标准且普遍接受的计算程序已经确立。然而，由于绝对吸收光谱测量存在困难，难以评估掺杂在粉末和薄膜材料中的三价RE离子的光学跃迁性质。在这项工作中，我们提出了一种新途径来计算任何形态和形状的三价RE离子掺杂材料的贾德 - 奥费尔特参数。在该方法中，利用了连接辐射跃迁速率和贾德 - 奥费尔特参数的荧光衰减值。作为所提出的贾德 - 奥费尔特计算方法的一个应用实例，通过所提出的途径计算了NaYF中Er的贾德 - 奥费尔特参数，发现所得结果与从其他途径得出的结果合理一致。还证明了只要能够测量荧光衰减值，所提出的贾德 - 奥费尔特计算方法就是评估非透明基质中三价RE离子光学跃迁性质的一种切实可行且有效的途径。
