Lu_2O_3:Er^(3+)荧光粉的Judd-Ofelt参数计算  

Calculation of Judd-Ofelt Parameters for Lu_2O_3:Er^(3+) Phosphor

作　　者：于春凤 张翔清 韩文燕 张金苏 李香萍 徐赛 陈宝玖 YU Chun-Feng;ZHANG Xiang-Qing;HAN Wen-Yan;ZHANG Jin-Su;LI Xiang-Ping;XU Sai;CHEN Bao-Jiu(School of Science,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学理学院,大连116026

出　　处：《无机材料学报》2019年第2期213-218,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(11774042;11704056);中央高校基本科研业务费(3132016333)~~

摘　　要：三价稀土离子掺杂透明发光材料的f-f跃迁性质可以根据Judd-Ofelt理论进行研究。对于不透明的粉末材料,由于不能测量其吸收光谱,难以采用传统的Judd-Ofelt理论进行计算。针对非透明材料,本研究提出了一种利用漫反射光谱计算稀土掺杂粉末材料Judd-Ofelt参数的方法:首先,利用Kubelka-Munk方程将漫反射谱转换为强度为相对值的吸收光谱,然后计算得到相对Judd-Ofelt参数,再利用荧光衰减测量对相对Judd-Ofelt参数进行修正,得到真实的Judd-Ofelt参数。将该方法用于计算固相反应合成的Lu_2O_3:Er^(3+)样品的Judd-Ofelt参数,并把利用吸收截面计算得到的Er^(3+)的4I13/2能级的辐射跃迁速率与利用Judd-Ofelt参数计算得到的结果进行了比较,证明研究提出的计算Judd-Ofelt参数的方法是可行的。Optical transition properties of trivalent rare earth ions in transparent luminescent materials can be investigated via Judd-Ofelt analysis.The traditional Judd-Ofelt analysis can not be applied to nontransparent powders since its absorption spectra are unable to be measured.Therefore,in this study,a procedure for calculating the Judd-Ofelt parameters was proposed by using defuse-reflection spectrum.Firstly,the defuse-reflection spectrum was transformed into relative absorption spectrum based on Kubelka-Munk function,and then the relative Judd-Ofelt parameters were confirmed from the relative absorption spectrum,at last the actual Judd-Ofelt parameters were obtained by using fluorescence decay data for calibrating the relative values.The method proposed for Judd-Ofelt parameters’calculation was applied to Lu2O3:Er^3+phosphor prepared by solid-state reaction,and the method was confirmed.The obtained Judd-Ofelt parameters were examined by comparing the radiative transition rates of 4I13/2 derived from the absorption cross section with which obtained from usual route by using the Judd-Ofelt parameters.The present study demonstrated that the proposed Judd-Ofelt analysis route is reliable and practical.

关 键 词：JUDD-OFELT理论 Kubelka-Munk方程 光学跃迁 荧光衰减 

分 类 号：TQ174[化学工程—陶瓷工业]