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Orthogonal luminescence properties of a single rare-earth activator ion doped upconversion nanoparticles

LING Xiao MEI Qing-song

凌枭, 梅青松. 单一稀土激活剂离子的正交上转换发光特性[J]. 中国光学, 2020, 13(5): 1158-1170. doi: 10.37188/CO.2020-0020
引用本文: 凌枭, 梅青松. 单一稀土激活剂离子的正交上转换发光特性[J]. 中国光学, 2020, 13(5): 1158-1170. doi: 10.37188/CO.2020-0020
LING Xiao, MEI Qing-song. Orthogonal luminescence properties of a single rare-earth activator ion doped upconversion nanoparticles[J]. Chinese Optics, 2020, 13(5): 1158-1170. doi: 10.37188/CO.2020-0020
Citation: LING Xiao, MEI Qing-song. Orthogonal luminescence properties of a single rare-earth activator ion doped upconversion nanoparticles[J]. Chinese Optics, 2020, 13(5): 1158-1170. doi: 10.37188/CO.2020-0020

单一稀土激活剂离子的正交上转换发光特性

doi: 10.37188/CO.2020-0020
详细信息
  • 中图分类号: TP394.1; TH691.9

Orthogonal luminescence properties of a single rare-earth activator ion doped upconversion nanoparticles

Funds: Supported by National Natural Science Foundation of China (No. 21675038)
More Information
    Author Bio:

    LING Xiao (1994—), male, born in Wangjiang Country, Anhui Province. In 2013-2017, he studied in the pharmaceutical engineering major, School of Chemistry and Chemical Engineering, Hefei Normal University and obtained the bachelor's degree. Since 2017, he has been studying in the School of Food and Biological Engineering, Hefei University of Technology as a graduate student, while conducting the research on the up-conversion nanoparticles doped with rare earth. E-mail: 18755132335@163.com

    MEI Qing-song (1986—), male, doctor, associate professor and master supervisor. In 2012, he received his doctorate from the University of Science and Technology of China. He is currently engaged in the preparation of up-conversion luminescence nanomaterials and the research of their application in biomedical imaging. E-mail: qsmei@hfut.edu.cn

    Corresponding author: qsmei@hfut.edu.cn
  • 摘要: 上转换发光纳米材料由于其特有的光学性质而一直备受关注,但常见的上转换发光纳米材料多为单色发光,为了实现上转换多色正交发光,同时避免多种掺杂剂离子的合成复杂性以及相互间的干扰性,利用Er3+2H11/2,4S3/24I15/2能级跃迁产生的绿色发光和4F9/24I15/2能级跃迁产生的红色发光,设计出由Er3+单个激活剂离子掺杂的双激发上转换纳米颗粒。通过热分解法一步步合成出NaErF4:Yb(19.5%)/Tm(0.5%)@NaYF4:Yb(10%)@NaNdF4:Yb(10%)三层结构的上转换纳米颗粒。此方法合成出来的颗粒大小均一、结构稳定、分散性好。该双激发纳米颗粒能够在980 nm和808 nm的激发光下实现红色和绿色的正交发射光,且其单独发光不受影响。在980 nm激发下,红色光中650 nm处的发射峰强度大约能达到540 nm处发射峰的9.46倍;在808 nm激发下,绿色光中540 nm处发射峰强度大约能达到650 nm处发射峰强度的5.39倍。
  • 图  1  核、核壳、核壳壳3种结构纳米颗粒的XRD衍射图谱。

    Figure  1.  X-ray diffraction patterns of the core NPs, core@shell NPs and core@shell@shell NPs.

    图  2  (a) NaErF4:Yb/Tm, (b) NaErF4:Yb/Tm@NaYF4:Yb, (c) NaErF4:Yb/Tm@NaYF4:Yb@NaNdF4:Yb 3种不同结构纳米颗粒透射电镜图。

    Figure  2.  The TEM images of (a) core NaErF4:Yb/Tm NPs, (b) core@shell NaErF4:Yb/Tm@NaYF4:Yb NPs, and (c) core@shell@shell NaErF4:Yb/Tm@NaYF4:Yb@NaNdF4:Yb NPs.

    图  3  不同激发波长下的纳米颗粒荧光光谱图。插图为980 nm和808 nm激光器激发下的发光实物图。

    Figure  3.  Fluorescence spectra of NPs under different excitation wavelengths. The inset shows the corresponding fluorescence photo excited by 980 nm and 808 nm laser.

    图  4  在(a)980 nm和(b)808 nm激光激发下的纳米颗粒荧光光谱变化图。(c)不同激发波长下纳米颗粒随时间变化的荧光比率的变化图(II0分别表示在650 nm和540 nm处发光峰强度)。

    Figure  4.  The luminescence spectrum variations of NPs under (a) 980 nm excitation and (b) 808 nm excitation . (c) The luminescence ratio variations of NPs with different synthesis time at different excitation wavelengths (I and I0 represent the luminescence peak intensities at 650 nm and 540 nm, respectively).

    图  5  在(a)980 nm和(b)808 nm激发下的中间层和外层不同摩尔量的纳米颗粒荧光光谱变化图。(c)对应的荧光比率的变化图(II0分别表示在650 nm和540 nm处的发光峰强度)。

    Figure  5.  The luminescence spectrum variations of NPs with different molar weights in the middle and outer layers under (a) 980 nm excitation, and (b) 808 nm excitation. (c) The luminescence ratio variations of the corresponding NPs under different excitation wavelengths (I and I0 represent the luminescence intensities at 650 nm and 540 nm, respectively).

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出版历程
  • 收稿日期:  2020-02-08
  • 修回日期:  2020-04-07
  • 网络出版日期:  2020-09-16
  • 刊出日期:  2020-10-01

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