Luminescence enhancement of Y2O3:Er3+ and Y2O3:Yb3+/Er3+ sub-microcrystals by Zr4+ ions Co-doping

IF 3.8 Q2 CHEMISTRY, PHYSICAL

Chemical Physics Impact Pub Date : 2025-02-07 DOI:10.1016/j.chphi.2025.100846

Zixuan Jiang , Bing Liu , Zehua Zhang , Lili Wang , Zhixu Jia , Dan Zhao

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Abstract

The co-doping effect of Zr⁴⁺ ions on upconversion (UC) luminescent properties in visible region of Y₂O₃: Er³⁺ and Y₂O₃: Er³⁺, Yb³⁺ sub-microcrystals prepared by urea precipitation method has been investigated under 980 nm excitation. Compared with the original Y₂O₃: Er³⁺ and Y₂O₃: Er³⁺, Yb³⁺ sub-microcrystals, the UC luminescence of sub-microcrystals with similar size was enhanced after Zr⁴⁺ ions co-doping. The UC luminescent properties have been discussed in detail via luminescence spectra, decay curve analysis and a suitable energy level diagram. The enhancement mechanism of UC luminescence in the two series of Zr⁴⁺ ions doped sub-microcrystals was attributed to the complex crystal field around Er³⁺ ions caused by Zr⁴⁺ ions co-doping. After Zr⁴⁺ ions substituted Y³⁺ions and entered the crystal lattice, the charge mismatch and lattice distortion made the crystal field more complex. This research contributes to the understanding of UC luminescent properties of lanthanide (Ln³⁺) ions doped UC materials and their technological applications in fields such as bioimaging, drug delivery, and optical temperature sensors.

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