Preparation and upconversion luminescence of YVO₄:Er³⁺,Yb³⁺

Yong-ming Zhang~(1)),Yan-hong Li~(1)),Peng Li~(1)),Guang-yan Hong~(2)),and Ying-ning Yu~(2)) 1) School of Materials Science and Engineering,Shenyang Institute of Chemical Technology,Shenyang 110142,China 2) Key Laboratory of Rare Earth Chemistry and Physics,Chinese Academy of Sciences,Changchun 130022,China

摘 要：<正>YVO₄:Er³⁺,Yb³⁺ with varying Yb³⁺ concentrations were prepared by a precipitation method.The results of X-ray diffraction （XRD） show that all the samples have a tetragonal zircon structure;the calculated average crystallite sizes are in the range of 14-22 nm.The lattice constants and cell volume of the samples decrease slightly with the increase in Yb³⁺ concentration.The upconversion luminescence spectra of all the samples were studied under 980 nm laser excitation.The strong green emission is observed,which is attributed to the ²H_11/2→4I_15/2 and ⁴S_3/2→⁴I_15/2 transitions of Er³⁺,and the red emission peaks in 650-675 nm can be ignored.The emission intensity for the sample depends on the Yb³⁺concentration.These results reveal that the upconversion processes of YVO₄:Er³⁺,Yb³⁺ are related to the structure and the doping Yb³⁺ concentration of the sample.

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