Defects and symmetry influence on visible emission of Eu doped nanoceria
Defects and symmetry influence on visible emission of Eu doped nanoceria
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DOI：
10.1063/1.2904627
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发表时间：
2008-03-24
影响因子：
4
通讯作者：
Seal, Sudipta
中科院分区：
文献类型：
--
作者：
Babu, Suresh;Schulte, Alfons;Seal, Sudipta
采用室温化学沉淀法合成了10 nm的铕掺杂氧化铈颗粒，并在500和900 ℃下退火，研究了其对发光的影响。X射线光电子能谱结果表明，Eu掺杂使Ce ~（3+）浓度从20%增加到23%，但退火后Ce ~（3+）浓度降低到8%。拉曼研究表明，由于局部对称有序与温度的渐进蓝移从461到464厘米（-1）。发射强度随激发波长而变化，观察到的跃迁表明Eu 3+存在于不同的对称环境中。(C)2008年美国物理学会。
Europium doped cerium oxide particles of 10 nm were synthesized by room temperature chemical precipitation technique and annealed at 500 and 900 C to study its effect on luminescence. X-ray photoelectron spectroscopic result shows an increase in Ce3+ concentration from 20% to 23% on Eu doping but decreases to 8% on annealing. Raman studies show a progressive blueshift from 461 to 464 cm(-1) due to local symmetry ordering with temperature. Emission intensity varies with the wavelength of excitation and observed transitions indicate the presence of Eu3+ in different symmetry environments. (C) 2008 American Institute of Physics.