Dy^(3+),Eu^(3+)共掺NaGd(WO_(4))_(2)荧光粉的发光性能、能量传递和J-O理论分析  

Luminescence,energy transfer and J-O analysis of Dy^(3+),Eu^(3+)Co-doped NaGd(WO_(4))_(2)phosphor

作　　者：叶森 刘运[2] 刘文龙[2] 刘丁菡[2] 朱毅 王蓉 张进[3] YE Sen;LIU Yun;LIU Wen-long;LIU Ding-han;ZHU Yi;WANG Rong;ZHANG Jin(School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi′an 710021, China;College of Electronic Information and Artificial Intelligence, Shaanxi University of Science & Technology, Xi′an 710021, China;School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021 [2]陕西科技大学电子信息与人工智能学院,陕西西安710021 [3]陕西科技大学电气与控制工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2021年第3期101-107,137,共8页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51272148)。

摘　　要：采用高温固相法成功制备了一系列发光性能优异的NaGd(WO_(4))_(2)∶Dy^(3+)和NaGd(WO_(4))_(2)∶Dy^(3+),Eu^(3+)荧光粉,通过X射线衍射、扫描电子显微镜和荧光光谱对样品的物相、形貌、发光性能和能量传递机理进行了研究.表征结果表明所制样品的物相结构为四方相结构,I41/a(88)空间群.Dy^(3+)离子的掺杂浓度为7 mol%时,NaGd(WO_(4))_(2)(NGW)具有最佳紫外光激发荧光性能.在454 nm激发下,NGW∶0.07Dy^(3+),0.09Eu^(3+)荧光粉在617 nm处Eu^(3+)的电偶极跃迁发光最强,且Dy^(3+)离子和Eu^(3+)离子间的能量传递机制为电四极矩-电四极矩相互作用.同时,通过调控Dy^(3+)离子和Eu^(3+)离子的相对含量,实现其光色可调,使其更广泛地应用在光色可调显示设备和白光LED等领域中.A series of NaGd(WO_(4))_(2):Dy^(3+)and NaGd(WO_(4))_(2):Dy^(3+),Eu^(3+)phosphors with excellent illumination performance were successfully synthesized by a high temperature solid-state reaction in air atmosphere.The crystal structure,morphology,luminescent properties and energy transfer mechanism of the samples were discussed by XRD,SEM and fluorescence spectroscopy.The analysis showed that the synthesized samples were tetragonal structure with I41/a(88)space group.Upon UV excitation,the optimal Dy^(3+)doping concentration of NaGd(WO_(4))_(2)(NGW)is 7 mol%.Under the excitation of 454 nm,the NGW∶0.07Dy^(3+),0.09Eu^(3+)phosphor emitted the strongest 5D0→7F2 electric dipole transition of Eu^(3+)at 617 nm and the energy transfer mechanism between Dy^(3+)and Eu^(3+)ions in the Co-doped NGW phosphor was quadrupole-quadrupole interaction.Meanwhile,multicolor emissions could be easily obtained by modulating the relative content of Dy^(3+)and Eu^(3+)in NGW samples,which makes them more widely apply in the fields of photochromic tunable display equipment and white LED.

关 键 词：NaGd(WO_(4))_(2) 荧光性能 能量传递 J-O理论 

分 类 号：O482.31[理学—固体物理]