Lu2O3:Er3+荧光粉的Judd-Ofelt参数计算

doi:10.15541/jim20180212

无机材料学报 ›› 2019, Vol. 34 ›› Issue (2): 213-218.DOI: 10.15541/jim20180212 CSTR: 32189.14.10.15541/jim20180212

Lu₂O₃:Er³⁺荧光粉的Judd-Ofelt参数计算

于春凤,张翔清,韩文燕,张金苏,李香萍,徐赛,陈宝玖

大连海事大学理学院, 大连 116026

收稿日期:2018-05-08 修回日期:2018-07-11 出版日期:2019-02-20 网络出版日期:2019-01-24
作者简介:于春凤(1995-),女,硕士研究生. E-mail: 434319636@qq.com
基金资助:
国家自然科学基金(11774042, 11704056);中央高校基本科研业务费(3132016333)

Calculation of Judd-Ofelt Parameters for Lu₂O₃:Er³⁺ Phosphor

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

Received:2018-05-08 Revised:2018-07-11 Published:2019-02-20 Online:2019-01-24
About author:YU Chun-Feng. E-mail: 434319636@qq.com
Supported by:
National Natural Science Foundation of China (11774042, 11704056);Fundamental Research Funds for the Central Universities (3132016333)

摘要/Abstract

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Lu₂O₃：Er³⁺样品的Judd-Ofelt参数, 并把利用吸收截面计算得到的Er³⁺的⁴I_13/2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。

关键词: Judd-Ofelt理论, Kubelka-Munk方程, 光学跃迁, 荧光衰减

Abstract:

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:Er³⁺ 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 ⁴I_13/2 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.

Key words: Judd-Ofelt theory, Kubelka-Munk equation, optical transition, fluorescence decay

中图分类号:

TQ174

于春凤,张翔清,韩文燕,张金苏,李香萍,徐赛,陈宝玖. Lu₂O₃:Er³⁺荧光粉的Judd-Ofelt参数计算[J]. 无机材料学报, 2019, 34(2): 213-218.

YU Chun-Feng, ZHANG Xiang-Qing, HAN Wen-Yan, ZHANG Jin-Su, LI Xiang-Ping, XU Sai, CHEN Bao-Jiu. Calculation of Judd-Ofelt Parameters for Lu₂O₃:Er³⁺ Phosphor[J]. Journal of Inorganic Materials, 2019, 34(2): 213-218.

图/表 6

图1 Lu2O3: 1.0mol% Er3+样品和体心立方相Lu2O3(JCPDS 86-2475)的XRD图谱

Fig. 1 XRD patterns of Lu2O3: 1.0mol% Er3+ and Lu2O3 standard card JCPDS 86-2475

图2 Lu2O3: 1.0mol% Er3+荧光粉的FE-SEM照片

Fig. 2 FE-SEM images of Lu2O3: 1.0mol% Er3+ phosphor

图3 Lu2O3:Er3+的漫反射谱(a)和相对吸收光谱(b)

Fig. 3 Defuse-reflection (a) and relative absorption (b) spectra of Lu2O3:Er3+

表1 Er3+在Lu2O3中的相对实验振子强度、相对理论振子强度和相对J-O参数

Table 1 Relative experimental oscillator strengths, relative theoretical oscillator strengths for some transitions of Er3+ in Lu2O3 and relative J-O parameters

Energy level	Relative experimental oscillator strengths, ×10^-8	Relative theoretical oscillator strengths, ×10^-8
⁴I_11/2	6.16	7.01
⁴I_9/2	5.03	10.00
⁴F_9/2	23.02	51.18
⁴S_3/2	4.61	5.43
²H_11/2	86.53	119.96
⁴F_7/2	8.42	31.91
⁴F_5/2,⁴F_3/2	0.96	10.27
²H_9/2	0.58	9.97
⁴G_11/2	53.73	210.69
Error: =14.3 Relative J-O parameters: Ω °₂=4.43´10^-21; Ω °₄=3.85´10^-21; Ω °₆=1.03´10^-21

图4 样品4I13/2能级的荧光衰减曲线

Fig. 4 Fluorescent decay curve of 4I13/2 level of Er3+ in Lu2O3 powder

图5 Lu2O3:Er3+荧光粉的吸收截面

Fig. 5 Absorption cross section of Lu2O3:Er3+ phosphor

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Lu₂O₃:Er³⁺荧光粉的Judd-Ofelt参数计算

Calculation of Judd-Ofelt Parameters for Lu₂O₃:Er³⁺ Phosphor

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