Yb^(3+)/Tm^(3+)共掺层状钙钛矿型CaBi_(2)Nb_(2)O_(9)半导体的制备及上转换发光性能研究  

The Preparation and Upconversion Luminescence Properties of Yb^(3+)/Tm^(3+)Co-doped Layered Perovskite CaBi_(2)Nb_(2)O_(9)Semiconductor

作　　者：张郎景 杨芳 舒匀 李昱 石艺 李文睿 李世坤 彭跃红 ZHANG Langjing;YANG Fang;SHU Yun;LI Yi;SHI Yi;LI Wenrui;LI Shikun;PENG Yuehong(School of Resources Environment and Chemistry,Chuxiong Normal University,Chuxiong 675000,China;School of Physics and Electronical Science,Chuxiong Normal University,Chuxiong 675000,China)

机构地区：[1]楚雄师范学院资源环境与化学学院,云南楚雄675000 [2]楚雄师范学院物理与电子科学学院,云南楚雄675000

出　　处：《大学物理实验》2024年第5期63-67,共5页Physical Experiment of College

基　　金：云南省地方本科高校基础研究联合专项资金项目面上项目(202101BA070001-085);2024年度云南省大学生创新创业训练计划项目。

摘　　要：采用固相法合成了Yb^(3+)/Tm^(3+)共掺杂的层状钙钛矿型CaBi_(2)Nb_(2)O_(9)(CBN)上转换(UC)发光材料,并利用粉末X射线衍射(XRD)、场发射扫描电镜(FESEM)和UC发射光谱研究了它们的物相结构、形貌和上转换发光性能。在980 nm激发下,CaBi_(2)Nb_(2)O_(9):Yb^(3+)/Tm^(3+)样品呈现出以478 nm为中心的强蓝光发射,并伴有典型的647 nm、695 nm弱红光发射和783 nm近红外发射,这归因于Tm^(3+)分别对应于^(1)G_(4)→^(3)H_(6)、^(1)G_(4)→^(3)F_(4)、^(3)F_(3)→^(3)H_(6)和^(3)H_(4)→^(3)H_(6)跃迁。功率依赖性研究表明,所有UC发射都是双光子过程。结果表明,CaBi_(2)Nb_(2)O_(9)是一种很有前途的UC发光材料。In this work,the Yb^(3+)/Tm^(3+)co-doped layered perovskite CaBi_(2)Nb_(2)O_(9)upconversion(UC)luminescent material were synthesized by the solid state method.Their crystalline structure,morphology and the UC luminescent properties were investigated through powder X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM)and spectral analysis of UC emission.Under 980 nm excitation,the CaBi_(2)Nb_(2)O_(9):Yb^(3+)/Tm^(3+)samples exhibits bright blue emission centered at 478 nm accompanied with typical weak red emission at 647 and 695 nm and near infrared(NIR)emission at 783 nm,which ascribe to ^(1)G_(4)→^(3)H_(6),^(1)G_(4)→^(3)F_(4),^(3)F_(3)→^(3)H_(6) and ^(3)H_(4)→^(3)H_(6) transitions of Tm^(3+),respectively.Power dependence studies reveal that all the UC emissions are a two-photon process.The results indicate that CaBi_(2)Nb_(2)O_(9)is a promising candidate for UC luminescent materials.

关 键 词：上转换发光 层状半导体 CaBi_(2)Nb_(2)O_(9) 

分 类 号：O433[机械工程—光学工程]