基质组成变化及电荷补偿对NaM4 (VO4)3∶Eu3+(M=Mg,Ca)荧光性能的调控

杨国辉; 陈凯; 王小军; 梁利芳; 蒙丽丽; 张丽霞

doi:doi:10.3788/fgxb20194006.0725

发光学报, 2019, 40 (6): 725, 网络出版: 2019-09-03

基质组成变化及电荷补偿对NaM₄ (VO₄)₃∶Eu³⁺(M=Mg,Ca)荧光性能的调控

Controlling Emissions of NaM₄ (VO₄)₃∶Eu³⁺(M=Mg,Ca) Phosphor by Adjusting Base Composition and Charge Compensation

论文大纲

杨国辉 ^*陈凯王小军梁利芳蒙丽丽张丽霞

作者单位

南宁师范大学化学与材料学院, 广西南宁 530001

摘要

利用高温固相法制备NaMg4-xCax(VO4)3∶0.01Eu3+(x=0~2)、NaMg2.1Ca1.9-y(VO4)3∶yEu3+(y=0~0.19)、NaMg2.1Ca1.9-y(VO4)3∶yEu3+,yX-(X=Cl,F)和NaMg2.1Ca1.9-2y(VO4)3∶yEu3+,yM+(M=Li,Na,K)系列荧光粉, 采用X射线粉末衍射仪、扫描电子显微镜和荧光分光光度计对样品进行了结构和性能表征。探讨基质结构变化和Li+、Na+、K+、F-、Cl-等阴阳离子的电荷补偿作用对VO3-4和Eu3+发光性能的影响以及能量传递机理。研究表明立方相NaMg2Ca2(VO4)3比四方相NaMg4(VO4)3更能被紫外光有效激发, 同时发射基质的蓝绿光和铕离子的红光, 且VO3-4和Eu3+之间的能量传递效率达到42.21%。电荷补偿剂能显著提高Eu3+的发射强度, 同时基质发光强度减弱表明电荷补偿剂增强了基质与激活剂离子间的能量传递。通过控制合成条件可以得到单一基质白光发射荧光粉。

Abstract

NaMg4-xCax(VO4)3∶0.01Eu3+(x=0~2), NaMg2.1Ca1.9-y(VO4)3∶yEu3+(y=0~0.19), NaMg2.1Ca1.9-y(VO4)3∶yEu3+,yX-(X=Cl,F) and NaMg2.1Ca1.9-2y(VO4)3∶yEu3+,yM+(M=Li, Na, K) phosphors have been synthesized by high temperature solid phase method. X-ray diffraction(XRD), scanning electron microscopy(SEM) and photoluminescence spectra were utilized to characterize the samples. The results show that the NaMg2Ca2(VO4)3 cubic phase phosphor can been effectly excited by UV light, and emit the blue green light of vanadate ions and the red light of europium ions simultaneously. The effect on the luminescence properties of VO3-4 and Eu3+ by adjusting matrix composition and charge compensation by F-, Cl-, Li+, Na+ and K+ ions, the energy transfer from VO3-4 to Eu3+, and the energy transfer mechanism have been discussed. Charge compensators can increase the emission intensity of Eu3+ and decrease the luminescence intensity of the substrate significantly, indicating that the charge compensators enhance the energy transfer between the substrate and activator ions. The emission intensities of the blue green and red light can be controlling, and a single base white light phosphor was obtained.

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杨国辉, 陈凯, 王小军, 梁利芳, 蒙丽丽, 张丽霞. 基质组成变化及电荷补偿对NaM₄ (VO₄)₃∶Eu³⁺(M=Mg,Ca)荧光性能的调控[J]. 发光学报, 2019, 40(6): 725. YANG Guo-hui, CHEN Kai, WANG Xiao-jun, LIANG Li-fang, MENG Li-li, ZHANG Li-xia. Controlling Emissions of NaM₄ (VO₄)₃∶Eu³⁺(M=Mg,Ca) Phosphor by Adjusting Base Composition and Charge Compensation[J]. Chinese Journal of Luminescence, 2019, 40(6): 725.

基质组成变化及电荷补偿对NaM₄ (VO₄)₃∶Eu³⁺(M=Mg,Ca)荧光性能的调控

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