Upconversion properties of Er³⁺, Yb³⁺ and Tm³⁺ codoped fluorophosphate glasses

详细信息    查看全文

• 作者：Meisong Liao ; Lili Hu ; Yongzheng Fang ; Junjie Zhang ; Hongtao Sun ; Shiqing Xu ; Liyan Zhang
• 关键词：Glasses ; Rare earth ; Upconversion properties
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2007
• 出版时间：November 2007
• 年：2007
• 卷：68
• 期：3
• 页码：531-535
• 全文大小：272 K

文摘

Er³⁺, Yb³⁺ and Tm³⁺ codoped fluorophosphate glasses emitting blue, green and red upconversion luminescence at 970 nm laser diode excitation were studied. It was shown that Tm³⁺ behaves as the sensitizer to Er³⁺ for the green upconversion luminescence through the energy transfer process: Tm³⁺:³H₄ + Er³⁺:⁴I_15/2 → Er³⁺:⁴I_9/2 + Tm³⁺:³H₆, and for the red upconversion luminescence through the energy transfer process: Tm³⁺:³F₄ + Er³⁺:⁴I_11/2 → Tm³⁺:³H₆ + Er³⁺:⁴F_9/2. Moreover, Er³⁺ acts as quenching center for the blue upconversion luminescence of Tm³⁺. The sensitization of Tm³⁺ to Er³⁺ depends on the concentration of Yb³⁺. The intensity of blue, green and red emissions can be changed by adjusting the concentrations of the three kinds of rare earth ions. This research may provide useful information for the development of high color and spatial resolution devices and white light simulation.