Dy3+,Tm3+掺杂的NaGd（MoO4）2白色荧光粉的制备与发光性能的研究  

Synthesized and luminescent properties of white phosphor NaGd（MoO4）2:Dy3+,Tm3+

作　　者：王永锐 耿秀娟[1] 解吉星 陈永杰[1] 杨英[1] WANG Yong-rui;GENG Xiu-juan;XIE Ji-xing;CHEN Yong-jie;YANG Ying(Key Laboratory of Rare Earth Chemistry and Application of Liaoning Province,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学辽宁省稀土化学及应用重点实验室

出　　处：《光电子．激光》2019年第10期1043-1049,共7页Journal of Optoelectronics·Laser

摘　　要：采用高温固相法成功制备出了一系列LED用白色荧光粉NaGd1-x-y(MoO4)2:xDy3+,yTm3+,用X射线衍射仪(XRD),荧光分光光度计和紫外-可见-近红外光谱分析系统对样品的物相结构和发光性能进行了表征。结果显示制备的荧光粉的白光由Dy3+的特征黄光发射(575 nm)、特征蓝光发射(488 nm)与Tm3+的特征蓝光发射(459 nm)组合而成。制备的NaGd(MoO4)2基质为四方晶系即白钨矿结构。在上述荧光粉中,激活离子Dy3+发射4F9/2-6H13/2跃迁的黄光(575 nm)和4F9/2-6H15/2跃迁的蓝光(488 nm),激活离子Tm3+发射1D2-3F4的蓝光(459 nm)跃迁,蓝光发射受晶体场的影响被劈为两个发射峰。该系列荧光粉在389 nm波长激发下,当Dy3+浓度为10%,Tm3+浓度为12%时样品色坐标(0.3266,0.3263)最接近标准白光(0.33,0.33),当Dy3+浓度为8%,Tm3+浓度为12%时样品发光强度达到最大,色坐标为(0.3777,0.3696),结果表明,该系列荧光粉有潜在的发展和应用前景。A series of LED white phosphors NaGd1-x-y(MoO4)2:xDy3+yTm3+ were synthesized by high temperature solid state method.The phase structure and luminescence properties of samples were investigated by X-ray diffractometer(XRD),fluorescence spectrophotometer and UV-Vis-NIR spectroscopy.The results show that the white light of the prepared phosphor is composed of the characteristic yellow light emission(575 nm) of Dy3+,the characteristic blue light emission(488 nm) and the characteristic blue light emission(459 nm) of Tm3+.The prepared NaGd(MoO4)2 substrates are all scheelite structures,the activated ion Dy3+ emits 4F9/2-6H13/2 transition yellow light(575 nm) and the blue light of 4F9/2-6H15/2 transition(488 nm),the blue light transition of the activated ion Tm3+ emitting 1D2-3F4(459 nm) is a non-sensitive transition,and the blue light emission is reduced to two emission peaks by the influence of the crystal field.that when the phosphor is excited at 389 nm,when the concentration of Dy3+ is 10%, the concentration of Tm3+ is 12%, the sample is closest to the standard white light(0.33,0.33),and when the concentration of Dy3+ is 8%,the concentration of Tm3+ is 12%,the luminescence intensity of the sample reaches the maximum,the color coordinate is(0.377 7,0.369 6).The results show this series of phosphors has potential development and application prospects.

关 键 词：白色荧光粉 高温固相法 发光性能 

分 类 号：O482.31[理学—固体物理] TQ422[理学—物理]