掺杂稀土Tb的β-Ga_2O_3纳米纤维的结构及其光致发光研究  

Structure and Photoluminescence Properties of Tb-doped β-Ga_2O_3 Nanofibers

作　　者：赵建果[1] 张伟英[1] 刘照军[1] 谢二庆[2] 

机构地区：[1]洛阳师范学院物理与电子信息学院,洛阳471022 [2]兰州大学物理科学与技术学院,兰州731000

出　　处：《材料导报》2010年第18期32-34,共3页Materials Reports

基　　金：洛阳师范学院博士科研启动基金(10000887);洛阳师范学院校基金(2008-PYJJ-009)

摘　　要：采用电纺丝法制备了铽(Tb)掺杂的氧化镓(Ga2O3)纳米纤维,并用场发射扫描电镜(FE-SEM)、X射线衍射(XRD)、拉曼光谱(Raman)和光致发光谱(PL)对其进行了一系列的表征。结果表明,900℃退火的纳米纤维尺寸约为100nm,晶体结构是β相的Ga2O3,Tb离子5D4-7F5跃迁对应的550nm绿光发射最强。在稀土掺杂的纳米纤维的光致发光谱中没有发现β-Ga2O3缺陷能级的发光,用能量传递理论解释了这一现象。The Tb doped Ga2O3 nanofibers are prepared by electrospinning. The crystal structure, morphology and luminescence properties of the resulting nanofibers are separately investigated by field emission scanning electron microscopy（FE-SEM）, X-ray diffraction （XRD）, Raman and photoluminescence （PL） spectra. The results show that the diameter of the nanofibers calcined at 900℃ is about 100nm and the crystal structure of the nanofibers is β-Ga2O3. The nanofibers show dominant green emission at 550nm due to the 5D4-^7 F5 transition of the Tb ions. After doping Tb ions in Ga2O3 host, there is no the emission peak about Ga2 O3 itself, and it is explained through energy transfer theory.

关 键 词：电纺丝 纳米纤维 β-Ga2O3光致发光能量传递 

分 类 号：O78[理学—晶体学]