Energy transfer and 2 μm emission in Tm³⁺/Ho³⁺ co-doped(Y_0.87La_0.1Zr_0.03)₂O₃ nanopowders

Yaqian Chen，Huanping Wang，Xiaoting Zhang，Zhen Xiao，Qinghua Yang，Ruoshan Lei，Degang Deng，Lihui Huang，Shiqing Xu

College of Materials Science and Engineering, China Jiliang University

摘 要：(Y_0.87La_0.1Zr_0.03)₂O₃ nanopowders doped with various concentrations of Tm³⁺ and Ho³⁺ were prepared by the citrate method. The standard cubic Y₂O₃ phase can be matched in the Tm³⁺/Ho³⁺ co-doped(Y_0.87La_0.1Zr_0.03)₂ O₃ nanopowders. The nanopowders exhibit average particle sizes of 40,60, 80 and 100 nm after calcinated at 900,1000,1100 and 1200℃,respectively. The energy transfer from Tm³⁺ to Ho³⁺ and the optimum fluorescence emission around 2 μm were investigated. Results indicate that the emission bands at around 1.86 and 1.95 μm correspond to ³ F₄→³ H₆ transition of Tm³⁺ and ⁵ I₇→⁵ I₈ transition of Ho³⁺, respectively.Better spectral properties were achieved in Tm³⁺/Ho³⁺ co-doped(Y_0.87La_0.1Zr_0.03)₂O₃ nanopowders with the average size of 100 nm obtained at the conditions of the treatment of precursors calcinated at 1200 ℃ for 2 h doped with 1.5 mol% Tm³⁺ and 1 mol% Ho³⁺.

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