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    Journals >Acta Physica Sinica >Volume 68 >Issue 17 >Page 174204-1 > Article
    • Acta Physica Sinica
    • Vol. 68, Issue 17, 174204-1 (2019)
    Enhanced red upconversion fluorescence emission of Ho3+ ions in NaLuF4 nanocrystals through building core-shell structure
    Xue-Wen Yan1, Zhao-Jin Wang2, Bo-Yang Wang1, Ze-Yu Sun1, Chen-Xue Zhang1, Qing-Yan Han1, Jian-Xia Qi1, Jun Dong1、*, and Wei Gao1、*
    Author Affiliations
  • 1School of Electronic Engineering, Xi’an University of Post and Telecommunications, Xi’an 710121, China
  • 2College of Physics and Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
    • show less
    DOI: 10.7498/aps.68.20190441 Cite this Article
    Xue-Wen Yan, Zhao-Jin Wang, Bo-Yang Wang, Ze-Yu Sun, Chen-Xue Zhang, Qing-Yan Han, Jian-Xia Qi, Jun Dong, Wei Gao. Enhanced red upconversion fluorescence emission of Ho3+ ions in NaLuF4 nanocrystals through building core-shell structure [J]. Acta Physica Sinica, 2019, 68(17): 174204-1 Copy Citation Text show less
    XRD patterns of (a) NaLuF4:20.0%Yb3+ /2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+(x = 0%, 5.0%, 10.0%, 15.0%) core-shell nanocrystals.(a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+纳米晶体核, (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+(x = 0%, 5.0%, 10.0%, 15.0%)纳米核壳结构的XRD图谱
    Fig. 1. XRD patterns of (a) NaLuF4:20.0%Yb3+ /2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+(x = 0%, 5.0%, 10.0%, 15.0%) core-shell nanocrystals. (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+纳米晶体核, (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+(x = 0%, 5.0%, 10.0%, 15.0%)纳米核壳结构的XRD图谱
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    TEM images and EDX spectra of (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4: x%Yb3+ (x = 0, 5.0%, 10.0%, 15.0%) core-shell nanocrystals.(a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+纳米晶体和NaLuF4:20.0%Yb3+/2.0%Ho3+/12%Ce3+@ NaLuF4:x%Yb3+((b) 0, (c) 5.0%, (d)10.0%, (e) 15.0%)纳米核壳结构的TEM图谱
    Fig. 2. TEM images and EDX spectra of (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4: x%Yb3+ (x = 0, 5.0%, 10.0%, 15.0%) core-shell nanocrystals. (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+纳米晶体和NaLuF4:20.0%Yb3+/2.0%Ho3+/12%Ce3+@ NaLuF4:x%Yb3+((b) 0, (c) 5.0%, (d)10.0%, (e) 15.0%)纳米核壳结构的TEM图谱
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    The upconverison emission spectra (A), enhancement factor (B) and red andgreen emission intensity ratio (R/G) (C) of (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12%Ce3+@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 8.0%, 10.0%, 12.0%,15.0%) core-shell nanocrystals under 980 nm excitation.在980 nm激发下, (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+和(b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 8.0%,10.0%, 12.0%, 15.0%)纳米晶体及核壳结构的上转换发射光谱(A)、增强因子(B)和红绿比(C)
    Fig. 3. The upconverison emission spectra (A), enhancement factor (B) and red andgreen emission intensity ratio (R/G) (C) of (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+ nanocrystals and (b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12%Ce3+@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 8.0%, 10.0%, 12.0%,15.0%) core-shell nanocrystals under 980 nm excitation. 在980 nm激发下, (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+和(b)−(e) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 8.0%,10.0%, 12.0%, 15.0%)纳米晶体及核壳结构的上转换发射光谱(A)、增强因子(B)和红绿比(C)
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    The CIE diagram with position of color coordinates of Ho3+ in (a) NaLuF4 nanocrystals and (b)－(e) NaLuF4@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 10.0%, 15.0%) core-shell nanocrystals.(a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+以及(b)—(e)NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@NaLuF4:x%Yb3+ (x = 0%, 5.0%, 10.0%, 15.0%) 纳米晶体及核壳结构的色度坐标图
    Fig. 4. The CIE diagram with position of color coordinates of Ho3+ in (a) NaLuF4 nanocrystals and (b)－(e) NaLuF4@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 10.0%, 15.0%) core-shell nanocrystals. (a) NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+以及(b)—(e)NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@NaLuF4:x%Yb3+ (x = 0%, 5.0%, 10.0%, 15.0%) 纳米晶体及核壳结构的色度坐标图
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    Energy level diagrams of Ho3+, Yb3+, and Ce3+ions as well as proposed UC mechanisms.Ho3+, Yb3+和Ce3+离子的能级图和可能的上转换跃迁机理
    Fig. 5. Energy level diagrams of Ho3+, Yb3+, and Ce3+ions as well as proposed UC mechanisms. Ho3+, Yb3+和Ce3+离子的能级图和可能的上转换跃迁机理
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    Luminescence lifetimes of NaLuF4 and NaLuF4@NaLuF4 core-shell nanocrystals under 980 nm excitation at 654 nm.在980 nm近红外激光的激发下, Ho3+离子掺杂NaLuF4和NaLuF4@ NaLuF4纳米晶体的红光上转换发射的寿命衰减曲线图
    Fig. 6. Luminescence lifetimes of NaLuF4 and NaLuF4@NaLuF4 core-shell nanocrystals under 980 nm excitation at 654 nm. 在980 nm近红外激光的激发下, Ho3+离子掺杂NaLuF4和NaLuF4@ NaLuF4纳米晶体的红光上转换发射的寿命衰减曲线图
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    SamplesCIE chromaticity coordinates
    xy
    a (NaLuF4:20.0%Yb3+/2.0%Ho3+ /12.0%Ce3+) 0.55010.3891
    b (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4) 0.56210.3786
    c (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4: 5.0%Yb3+) 0.56430.3727
    d (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4: 10.0%Yb3+) 0.57240.3692
    e (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4: 15.0%Yb3+) 0.57560.3599
    Table 1.

    The calculated CIE chromaticity coordinates (x, y) of Ho3+ in NaLuF4 nanocrystals and NaLuF4@ NaLuF4:x%Yb3+ (x = 0%, 5.0%, 10.0%, 15.0%) core-shell nanocrystals.

    NaLuF4和NaLuF4@NaLuF4核壳纳米晶体的的CIE色坐标

    SamplesLifetime/μs
    650 nm
    a (NaLuF4:20.0%Yb3+/2.0%Ho3+ 12.0%Ce3+) 97.4 ± 0.2
    b (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4) 125.4 ± 1.1
    c (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:5.0%Yb3+) 136.3 ± 0.8
    d (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:10.0%Yb3+) 184.2 ± 0.6
    e (NaLuF4:20.0%Yb3+/2.0%Ho3+/12.0%Ce3+@ NaLuF4:15.0%Yb3+) 144.4 ± 0.4
    Table 2.

    Luminescence lifetimes of NaLuF4 and NaLuF4@NaLuF4 core-shell nanocrystals under 980 nm excitation at 650 nm

    NaLuF4和NaLuF4@ NaLuF4核壳纳米晶体的红光发射的荧光寿命

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    Xue-Wen Yan, Zhao-Jin Wang, Bo-Yang Wang, Ze-Yu Sun, Chen-Xue Zhang, Qing-Yan Han, Jian-Xia Qi, Jun Dong, Wei Gao. Enhanced red upconversion fluorescence emission of Ho3+ ions in NaLuF4 nanocrystals through building core-shell structure [J]. Acta Physica Sinica, 2019, 68(17): 174204-1
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