Up-conversion Properties of Er³⁺/Yb³⁺ Co-doped Li₃Ba₂Gd₃（MoO₄）₈ Phosphors

【摘要】 Er³⁺/Yb³⁺co-doped Li₃Ba₂Gd₃（Mo O₄）₈ phosphors were synthesized by conventional solid state reaction method,and their structure and spectral properties were investigated.The diffuse reflectance spectra showed that the ⁴I_15/2→⁴I_11/2 transition of Er³⁺and the ²F_7/2→²F_5/2transition of Yb³⁺ions were highly overlapped.Under the excitation of 980 nm,three up-conversion（UC）luminescence bands around 530,555 and 660 nm were observed,corresponding to the²H_11/2→⁴I_15/2,⁴S_3/2→⁴I_15/2 and ⁴F_9/2→⁴I_15/2 transitions of Er³⁺ions,respectively.The effects of the concentration and pumping power on the UC intensities of Li₃Ba₂Gd₃（Mo O₄）₈:Er³⁺/Yb³⁺phosphors were investigated,and the possible UC mechanism was proposed based on the results.更多还原

【Abstract】 Er³⁺/Yb³⁺co-doped Li₃Ba₂Gd₃（Mo O₄）₈ phosphors were synthesized by conventional solid state reaction method,and their structure and spectral properties were investigated.The diffuse reflectance spectra showed that the ⁴I_15/2→⁴I_11/2 transition of Er³⁺and the ²F_7/2→²F_5/2transition of Yb³⁺ions were highly overlapped.Under the excitation of 980 nm,three up-conversion（UC）luminescence bands around 530,555 and 660 nm were observed,corresponding to the²H_11/2→⁴I_15/2,⁴S_3/2→⁴I_15/2 and ⁴F_9/2→⁴I_15/2 transitions of Er³⁺ions,respectively.The effects of the concentration and pumping power on the UC intensities of Li₃Ba₂Gd₃（Mo O₄）₈:Er³⁺/Yb³⁺phosphors were investigated,and the possible UC mechanism was proposed based on the results.更多还原