近紫外激发单基质白光荧光粉NaLaMgWO6∶Dy^3+/Bi^3+的制备及能量传递  

Preparation and Energy Transfer Mechanism of Single-host White-light-emitting NaLaMgWO6∶Dy^3+/Bi^3+Phosphor

作　　者：王明华 廖金生[1,2] 孔莉芸 陈见华 汪欣怡 颜昊坤 WANG Ming-hua;LIAO Jin-sheng;KONG Li-yun;CHEN Jian-hua;WANG Xin-yi;YAN Hao-kun(School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;Jiangxi Rare Earth Functional Materials Technology Co., Ltd., Ganzhou 341000, China)

机构地区：[1]江西理工大学化学化工学院,江西赣州341000 [2]江西稀土功能材料科技有限公司,江西赣州341000

出　　处：《发光学报》2020年第5期519-528,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51862012);江西省科技厅5511重大研发专项(20165ABC28010)资助项目。

摘　　要：采用高温固相法制备了一系列单基质荧光粉NaLa1-x-yMgWO6∶xDy3+/yBi3+(x=0.01,0.02,0.04,0.06;y=0.01,0.02,0.04,0.06)。通过对Dy3+/Bi3+双掺杂浓度进行优化,Bi3+离子的掺杂不仅可以有效增强荧光粉的发光强度,还实现了发光颜色的可调。通过对系列NaLaMgWO6∶xDy3+/0.02Bi3+样品的荧光衰减曲线的分析可知,Dy3+离子浓度从1%增加到6%,Bi3+离子的荧光寿命逐渐减少,从而有力地证明了NaLaMgWO6∶Bi3+/Dy3+荧光粉中存在Bi3+→Dy3+的能量传递过程。另外,通过电多极相互作用公式计算可知,Bi3+→Dy3+能量传递过程为偶极-偶极的相互作用,最优Bi3+/Dy3+掺杂样品的能量传递效率达到42.67%。在紫外光的有效激发下,通过改变Dy3+离子掺杂浓度,NaLaMgWO6∶Bi3+/Dy3+荧光粉可以实现白光发射。研究证明NaLaMgWO6∶Bi3+/Dy3+荧光粉是一种具有潜在应用前景的白光发光材料。In this paper,a series of single-host phosphors NaLa1-x-yMgWO6∶xDy3+/yBi3+(x=0.01,0.02,0.04,0.06;y=0.01,0.02,0.04,0.06)were prepared by high temperature solid state method.By the optimization of Dy3+/Bi3+double codoping concentration,the doping of Bi3+ions can not only effectively enhance the luminescence intensity of phosphors,but also achieve the tune of luminescence color.The fluorescence lifetime of Bi3+for NaLaMgWO6∶xDy3+/0.02 Bi3+samples gradually decreased with the increased concentration of Dy3+ions(1%-6%),which proves strongly the presence of energy transfer process from Bi3+ions to Dy3+ions in NaLaMgWO6∶Bi3+/Dy3+phosphors.According to the calculation of the electric multipole interaction formula,we can know that the energy transfer process of Bi3+→Dy3+is a dipole-dipole interaction and the energy transfer efficiency of the optimal Bi3+/Dy3+doped samples was calculated to be 42.67%.Under the effective excitation of the UV-light(ultraviolet light),NaLaMgWO6∶Bi3+/Dy3+phosphor can realize the emission of white light by changing the amount of Dy3+ions.The research proves that NaLaMgWO6∶Bi3+/Dy3+phosphor is a kind of white light emitting material with potential application prospects.

关 键 词：铋/镝离子共掺杂 高温固相 能量传递 NaLaMgWO6 

分 类 号：TQ174[化学工程—陶瓷工业]