Yellow-Orange Upconversion Luminescence in NaYF4:Er3+, Yb3+ Phosphor Synthesized by Microwave Combustion Method

Jia Yue Sun; Chun Cao; Hai Yan Du

doi:10.4028/www.scientific.net/AMR.295-297.551

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Yellow-Orange Upconversion Luminescence in NaYF₄:Er³⁺, Yb³⁺ Phosphor Synthesized by Microwave Combustion Method

Abstract:

Erbium and ytterbium co-doped sodium yttrium fluoride (NaYF₄:Er³⁺,Yb³⁺) was synthesized by combusting in home microwave oven directly. The structure and morphology of the sample was characterized by the X-ray diffraction (XRD) and scanning electron microscopy (SEM), and its upconversion luminescence properties were investigated in detail. Under 980nm semiconductor laser excitation, the color of upconversion luminescence of NaYF₄:Er³⁺,Yb3+ was green and red, and its upconversion spectrum exhibited distinct emission peaks at 522, 543 and 652 nm, the emission appears yellow-orange to the naked eye. The law of luminescence intensity versus pump power proved that the intense green emission at 522 and 543 nm were from Er³⁺ (²H_11/2 → ⁴I_15/2and ⁴S_3/2 →⁴I_15/2), and the weaker red emission at 652 nm was from Er³⁺ (⁴F_9/2→⁴I_15/2), which belong to the two photon process.

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Advanced Materials Research (Volumes 295-297)

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551-554

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https://doi.org/10.4028/www.scientific.net/AMR.295-297.551

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July 2011

Authors:

Jia Yue Sun, Chun Cao, Hai Yan Du

Keywords:

Microwave Combustion, NaYF₄, Rare Earth Ions, Upconversion

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