LaPO_4:Gd^(3+),Tb^(3+)的制备及其发光性质研究  

Preparation and Luminescence Properties of LaPO_4:Gd^(3+),Tb^(3+)

作　　者：王静[1] 王茜[1] 孙佳林[1] 欧阳艳[1] 何晓燕[1] 

机构地区：[1]伊犁师范学院化学与环境科学学院,新疆伊宁835000

出　　处：《伊犁师范学院学报（自然科学版）》2016年第3期42-45,共4页Journal of Yili Normal University：Natural Science Edition

基　　金：伊犁师范学院校级课题(2012YB009)

摘　　要：采用化学共沉淀法合成了双组分稀土离子共掺的单一基质绿色荧光粉La PO4:Gd3+,Tb3+.研究结果表明:荧光粉为尺寸均一、直径约50 nm的小粒子团聚形成的球状颗粒;其X射线衍射峰与六方相La PO4(标准卡片JCPCDS 75-1881)完全相同,Gd3+、Tb3+取代La3+进入晶格,没有形成杂质;该荧光粉在264 nm波长激发下,最强发射峰位于545 nm处,呈绿色;荧光粉中Gd3+为敏化剂,有助于Tb3+的能量传递,使荧光强度增大;Tb3+为激活剂,随着Tb3+掺杂量的增加,荧光强度逐渐增大,但是当Tb3+掺杂量>7%时会产生浓度猝灭现象.A two-component rare earth ion was synthesized using chemical coprecipitation codoping single ma-trix green phosphor La PO4:Gd3+,Tb3+.The results show that the phosphor for uniform size,diameter of about 50 nmreunited to form small particles of spherical particles;The X-ray diffraction peak with the six-party La PO4(75-1881) standard card are exactly the same,Gd3+,Tb3+replace La3+into the crystal lattice,and formation of impurities;The phosphor powder under the 264 nm wavelength excitation,the strongest emission peak at 545 nm,green;Phos-phor Gd3+as sensitizer,contribute to the energy transfer of Tb3+,the fluorescence intensity increased;Tb3+as activa-tor,with the increment of Tb3+doping,the fluorescence intensity increased gradually,but when > 7% dosage of Tb3+concentration quenching phenomenon.

关 键 词：LaPO4:Gd3^+ Tb3^+ 发光性能 稀土金属 

分 类 号：O482.3[理学—固体物理]