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ZnO微米棒基质中铕离子的偏振敏感发光特性

余超 楚学影 姜丽 李金华

余超, 楚学影, 姜丽, 李金华. ZnO微米棒基质中铕离子的偏振敏感发光特性[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0236
引用本文: 余超, 楚学影, 姜丽, 李金华. ZnO微米棒基质中铕离子的偏振敏感发光特性[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0236
YU Chao, CHU Xue-ying, JIANG Li, LI Jin-hua. Polarization sensitive luminescence properties of europium ions in ZnO microrod matrix[J]. Chinese Optics. doi: 10.37188/CO.2023-0236
Citation: YU Chao, CHU Xue-ying, JIANG Li, LI Jin-hua. Polarization sensitive luminescence properties of europium ions in ZnO microrod matrix[J]. Chinese Optics. doi: 10.37188/CO.2023-0236

ZnO微米棒基质中铕离子的偏振敏感发光特性

doi: 10.37188/CO.2023-0236
基金项目: 吉林省自然科学基金面上项目(No. 20220101031JC)
详细信息
    作者简介:

    楚学影(1982—),女,吉林长春人,博士,副教授,2011 年于东北师范大学获得博士学位,主要从事半导体纳米材料制备及光电特性应用方面的研究。E-mail:xueying_chu@cust.edu.cn

  • 中图分类号: O469

Polarization sensitive luminescence properties of europium ions in ZnO microrod matrix

Funds: Supported by Natural Science Foundation Project of Jilin Province (No. 20220101031JC)
More Information
  • 摘要:

    针对基质晶格各向异性对稀土离子偏振发光特性的影响,采用水热法制备了ZnO微米棒及铕掺杂ZnO微米棒。对照研究发现,掺杂后的样品长径比增加,形貌由哑铃型转变为直微米棒。光学性质分析表明,385 nm处的束缚激子发光使得ZnO微米棒的紫外发光呈明显不对称线形,550 nm处观测到一个较弱的可见区发光。掺杂铕离子后,可见区域发光明显增强。对于Eu3+离子掺杂ZnO微米棒,532 nm激发下可观测到窄半峰宽的Eu3+离子特征发光峰。调节入射激发光的偏振方向时,Eu3+离子发光峰强度随偏振光角度呈周期性变化,且发光偏振度随掺杂浓度的增加而增大。以上结果表明,借助ZnO微米棒基质晶格可获得对激发光偏振敏感的铕离子发光。掺杂ZnO微米棒能够将低维ZnO材料的紫外光吸收性能与稀土离子优异的可见发光特性进行整合,使其在偏振光谱探测等领域具有重要的应用价值。

     

  • 图 1  (a) ZnO和(b) ZnO:Eu (3%)微米棒的SEM图;(c) 掺杂前后ZnO微米棒的XRD谱及标准卡数据(插图是衍射峰的局部放大图)

    Figure 1.  SEM images of (a) ZnO and (b) ZnO:Eu(3%) microrods; (c) XRD spectra and standard card data of ZnO microrods before and after doping (Inset is a partial magnification of the diffraction peaks)

    图 2  (a) 325 nm激发下掺杂前后单个ZnO微米棒PL光谱图(蓝色点划线是ZnO拟合后的分峰,红色点线是ZnO:Eu-3%拟合后的分峰);(b) 532 nm激发下不同掺杂浓度的单个ZnO:Eu微米棒PL光谱图(插图是浓度猝灭曲线)

    Figure 2.  (a) PL spectra of a single ZnO microrod before and after doping under 325-nm excitation (the blue dot line is the peak fitting by ZnO, and the red dot line is the peak fitting by ZnO:Eu-3%); (b) PL spectra of a single ZnO:Eu microrod with different doping concentrations at 532-nm excitation (Inset is the concentration quenching curve)

    图 3  ZnO和不同掺杂浓度ZnO:Eu微米棒紫外-可见吸收光谱图

    Figure 3.  Ultraviolet-visible absorption spectra of ZnO and ZnO:Eu microrods with different doping concentrations

    图 4  ZnO和不同掺杂浓度ZnO:Eu微米棒的时间分辨PL光谱图。插图是根据ZnO和ZnO:Eu微米棒的时间分辨PL计算的衰减常数

    Figure 4.  Time-resolved PL spectra of ZnO and ZnO:Eu microrods with different doping concentrations. The illustration is the attenuation constant calculated from the time-resolved PL of ZnO and ZnO:Eu microrods

    图 5  (a) 偏振敏感的发光特性测试光路图;(b)、(c)和(d) 532 nm激发下不同掺杂浓度ZnO:Eu微米棒发光峰值随偏振光角度变化图像

    Figure 5.  (a) Experimental setup for measuring the polarization-sensitive luminescence; (b), (c) and (d) The luminescence intensities of ZnO:Eu microrods with different doping concentrations vary with the angle of polarized light under of 532-nm excitation

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  • 收稿日期:  2023-12-26
  • 录用日期:  2024-04-15
  • 网络出版日期:  2024-05-07

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