Ionic liquid-assisted synthesis of Yb3+-Tm3+ codoped Y7O6F9 petal shaped microcrystals with enhanced upconversion emission

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Date
2018-07
Authors
Zhao, Jinbo
Wu, Lili
Zhang, Chuanjiang
Li, Tingxi
Jiang, Qinglong
Wang, Feng
Zhao, Ping
Ryu, Jong Eun
Guo, Zhanhu
Language
English
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Mechanical Engineering, School of Engineering and Technology
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Elsevier
Abstract

Petal-like Yb3+-Tm3+ codoped Y7O6F9 microparticles were achieved via ionic liquid-assisted (IL) hydrothermal process. The emission efficiency of Y7O6F9:Yb3+/Tm3+ powders is much stronger than that of Y2O3:Yb3+/Tm3+ sample. Under excitation at 980 nm with an unfocused laser beam under weak pump density of ∼0.1 W/cm2 (pump power 10 mW), the UC emission of the sample can been seen clearly. Four emission bands at 477, 540, 647 and 692 nm are observed and correspond to the 1G4 state to 3H6 state, 1D2 state to 3H5 state, 1G4 sate to 3F4 state, and 3F3 state to 3H6 state transition of Tm3+ ions. The enhanced UC emission is related to high crystallinity and lower effective phonon energy of oxyfluorides. The ionic liquid (IL) of [BMIM][BF4] is used both as the reaction medium and the source of F−.

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up-conversion photoluminescence, Y7O6F9:Yb3+/Tm3+, 980 nm excitation
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Cite As
Zhao, J., Wu, L., Zhang, C., Li, T., Jiang, Q., Wang, F., … Guo, Z. (2018). Ionic liquid-assisted synthesis of Yb3+-Tm3+ codoped Y7O6F9 petal shaped microcrystals with enhanced upconversion emission. Materials Research Bulletin, 103, 19–24. https://doi.org/10.1016/j.materresbull.2018.03.003
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https://hdl.handle.net/1805/15856
DOI
https://doi.org/10.1016/j.materresbull.2018.03.003
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Author's manuscript
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