YF3：Eu^3^＋的水热合成和发光性质  

Synthesis of Eu^(3+)-Doped YF_3 and Photoluminescence Property

作　　者：朱国贤[1,2] 李永大[1] 王兴权[1] 李松[2] 黄玉亮[2] 

机构地区：[1]长春理工大学理学院,吉林长春130022 [2]湛江师范学院化学科学与技术学院,广东湛江524048

出　　处：《激光与光电子学进展》2011年第3期26-29,共4页Laser & Optoelectronics Progress

基　　金：广东省湛江师范学院科学研究(L0604)资助课题

摘　　要：采用水热法合成了Eu3+单掺YF3荧光粉。分析了样品的结构与形貌,结果表明,所合成的样品为单相,颗粒粒度分布均匀。测定了YF3:Eu3+的激发和发射光谱,结果显示,激发光谱峰值分别为320,365,386,397,418和467 nm,激发主峰峰值位于397 nm;发射光谱由位于591 nm(5D0→7F1)和612 nm(5D0→7F2)两组线状峰构成,并以5D0→7F1磁偶极跃迁发射最强,表明Eu3+离子在YF3中主要占据反演对称中心的格位,呈现橙红色发光。分析了Eu3+离子浓度对样品发光强度的影响,随Eu3+浓度的增大,发射峰强度先增大;当Eu3+浓度为2%时,峰值强度最大;而后随Eu3+浓度的增大,峰值强度减小。Eu^3^＋-doped YF3 was prepared by a hydrothermal process. The structure and morphology of the sample were analyzed. The results indicate that the synthesized sample is single phase and the particle size is homogeneous. The excitation and emission spectra of YF3： Eu^3^＋ were investigated by fluorescence spectrophotometer. The excitation spectrum has several excitation bands at 320,365,386,397,418 and 467 nm, and the main peak value is 397 nm. Typical Eu^3^＋ emission peaks at 591 nm（^5D0→^7F1） and 612 nm（^5D0→^7F1） are observed when excited by 397 nm, and the strongest emission is 591 nm, demonstrating that the rare earth ions occupy the centrosymmetrical sites in YF3. The influence of the concentration of Eu^3^＋ ions to the emission intensity was investigated, and the results show that the emission spectrum intensity increases with increasing Eu^3^＋ concentration, and reaches the maximum value when the molar fraction of Eu^3^＋ is 2%, and then decreases due to the concentration quenching.

关 键 词：材料 水热法合成 发光 YF3 稀土离子 

分 类 号：O614.31[理学—无机化学]