Combustion synthesis and enhanced 1.5 μm emission in Y_2O_3:Er~(3+) powders codoped with La~(3+) ion

• 作 者: 雷若姗 王焕平 徐时清 田颖 杨清华
• 机 构: College of Materials Science and Engineering, China Jiliang University,
• 出 处: Journal of Rare Earths
• 发表日期: 2016年02期
• 关键词: powders ions combustion crystalline adjustment calcined attributed cubic calcina

Er~(3+) and La~(3+) codoped Y_2O_3 nanocrystalline powders were synthesized by gel combustion method and characterized with thermal analysis, X-ray diffraction(XRD), transmission electron microscopy(TEM), high-resolution TEM(HRTEM) techniques and fluorescence spectroscopy. After being calcined at 1200 oC, the(Y_(1–x) La_x)_2O_3:Er~(3+) powders were confirmed to be cubic Y_2O_3 phase with the crystalline grain size in the range of 20–40 nm. The Er~(3+) emission at 1.53 μm from the ~4I_(13/2)→~4I_(15/2) transition was observed, which was found to be enhanced by introducing La~(3+) ions. Such enhancement could be attributed to the adjustment of Er~(3+) ions’ local environment by the codoping of La~(3+) ions, leading to the increased ground state absorption cross section of Er~(3+) ions.

Er 3+ and La 3+ codoped Y 2 O 3 nanocrystalline powders were synthesized by gel combustion method and characterized with thermal analysis, X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (Y_ (1-x) La_x) __2O_3: Er ~ (3+) ores were confirmed to be cubic Y_2O_3 phase with the crystalline grain size in the range of 20- 40 nm. The Er ~ (3 +) emission at 1.53 μm from the ~ 4I_ (13/2) → ~ 4I_ (15/2) transition was observed, which was found to be enhanced by introducing La ~ (3+) ions The enhancement could be attributed to the adjustment of Er ~ (3 +) ions’ local environment by the codoping of La ~ (3+) ions, leading to the increased ground state absorption cross section of Er ~ (3+) ions.