Combustion synthesis and enhanced 1.5 μm emission in Y₂O₃:Er³⁺ powders codoped with La³⁺ ions

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• 作者：Ruoshan LEI ((雷若姗))^a ; Huanping WANG ((王焕平))^a ; Shiqing XU ((徐时清))^a ; ^{sxucjlu@163.com" class="auth_mail" title="E-mail the corresponding author} ; Ying TIAN ((田 颖))^a ; Qinghua YANG ((杨清华))^a
• 关键词：gel combustion method ; (Y1-xLax)2O3 ; Er3+ ; luminescence ; NIR (near infrared) ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：2
• 页码：125-129
• 全文大小：800 K

文摘

Er³⁺ and La³⁺ codoped Y₂O₃ 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 °C, the (Y_1-xLa_x)₂O₃:Er³⁺ powders were confirmed to be cubic Y₂O₃ phase with the crystalline grain size in the range of 20-40 nm. The Er³⁺ emission at 1.53 μm from the ⁴I_13/2→⁴I_15/2 transition was observed, which was found to be enhanced by introducing La³⁺ ions. Such enhancement could be attributed to the adjustment of Er³⁺ ions' local environment by the codoping of La³⁺ ions, leading to the increased ground state absorption cross section of Er³⁺ ions.