摘要
近年来稀土掺杂的上转换发光材料在太阳能电池、工业照明和医学等领域的应用越来越受到重视,目前的研究主要集中于新型高效稀土上转换发光材料的开发。对于发光材料的制备,基质的选择尤为重要,钼酸盐因具有稳定的物理化学性能、低的声子能量而从众多基质中脱颖而出。本文选择钼酸盐为稀土离子掺杂的基质材料,采用水热法制备了Tm、Yb离子掺杂的NaGd(MoO_(4))_(2)样品。通过改变离子掺杂的浓度,探究了NaGd(MoO_(4))_(2)荧光粉的发光特性。研究表明,在980 nm激光照射下,NaGd(MO4)2∶Yb^(3+)/Tm^(3+)在477 nm处发射蓝色荧光,在648 nm处发射红色荧光。固定Yb^(3+)的掺杂摩尔分数为6%,改变Tm^(3+)的掺杂摩尔分数分别为0、0.5%、1%和2%时,发现随着Tm^(3+)掺杂摩尔分数的增加,477 nm处的发射峰的强度先升高后降低,当Tm^(3+)的掺杂摩尔分数为0.5%时,钼酸盐荧光粉的发光强度最大,在多色照明及光源器件的应用方面有广阔的发展前景。
In recent years,rare-earth-doped up-conversion luminescent materials have received increasing attention in solar cells,industrial lighting,and medical fields.The current research is mainly to find new and efficient rare-earth up-conversion luminescent materials.For the study of luminescent materials,the choice of matrix is particularly important.Molybdate stands out from many matrixes due to its stable physical and chemical properties and low phonon energy.In this paper,molybdate is selected as the matrix material doped with rare earth ions.Tm and Yb ion-doped NaGd(MoO_(4))_(2)samples are prepared by hydrothermal method,and the change of the luminescence characteristics of NaGd(MoO_(4))_(2)phosphor is explored by changing the ion doping concentration.Through the analysis of its spectrum,it is found that under 980 nm laser irradiation,NaGd(MO4)2∶Yb^(3+)/Tm^(3+)has a blue emission peak at 477 nm and a red emission peak at 648 nm.When the doping mole fraction of fixed Yb^(3+)is 6%and the doping mole fraction of Tm^(3+)is changed to 0,0.5%,1%and 2%respectively,it is found that with the increase of the doping mole fraction of Tm^(3+),the intensity of the emission peak at 477 nm first increases and then decreases.When the doping mole fraction of Tm^(3+)is 0.5%,the luminous intensity of molybdate phosphor first increases and then decreases to the maximum.It has broad prospects in the application of multi-color lighting and light source devices.
作者
卜芃
李宏亮
BU Peng;LI Hong-Liang(Department of Criminal Science and Technology,Hunan Police College,Changsha 410138,China;Chemistry and Chemicl Engineering of Central South University,Changsha 410083,China)
出处
《应用化学》
CAS
CSCD
北大核心
2023年第3期374-379,共6页
Chinese Journal of Applied Chemistry
基金
湖南省教育厅科学研究项目(No.19C0714)资助。
关键词
稀土掺杂
钼酸盐
上转换发光
微观形貌
Rare earth doping
Molybdate
Up-conversion luminescence
Micromorphology
