Abstract
ZrO2·Al2O3:Er powder was synthesized by the conventional solid-state reaction method. All the synthesized materials were monoclinic structure of ZrO2 (m-ZrO2) and Al2O3 phases. Scanning electron microscope images showed the spherical particles with diameter of ∼ (30–200) nm. The down-conversion luminescence spectra excited by 380 nm shows near infrared emission band is centered at 1540 nm, corresponding to the transitions of 4I13/2–4I15/2 of Er3+ ions. Under the excitation of a 976 nm laser diode, the up-conversion luminescence spectra of the samples show a red emission band at ∼ 680 nm and a green emission band at ∼ 565 nm, corresponding to the transitions of 4F9/2–4I15/2, 4S3/2–4I15/2, of Er3+ ions, respectively. The dependence of up and down-conversion luminescence properties on dopant concentrations, annealing temperature and Al2O3 concentrations are investigated. These results suggested that this phosphor is a very promising material for light emission and bioimaging.
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Acknowledgment
This research is funded by the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant number 103.03-2017. 35.
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Van, H.N., Van Huan, P., Nguyen, DH. et al. Up/Down-Conversion Luminescence of Er3+ Doped ZrO2·Al2O3 Powder. J. Electron. Mater. 48, 8054–8060 (2019). https://doi.org/10.1007/s11664-019-07644-2
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DOI: https://doi.org/10.1007/s11664-019-07644-2