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首页> 外文期刊>Physical review >Site-selective transient photoluminescence enhancement of impurity-trapped excitons in NaMeF_3: Yb~(2+)
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Site-selective transient photoluminescence enhancement of impurity-trapped excitons in NaMeF_3: Yb~(2+)

机译:NaMeF_3:Yb〜(2+)中杂质捕获的激子的定点瞬态光致发光增强

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摘要

The excited-state structure of impurity-trapped excitons are measured in a multisite system. We use a two-color (UV-IR) pulsed photoluminescence enhancement technique, which probes the interlevel transitions and dynamics of impurity-trapped excitons in doped insulating phosphor materials. The technique is applied to NaMgF,:Yb~(2+), which exhibits emission from two charge-compensation centers with peaks at 22300 cm~(-1) (448 nm) and 24000 cm~(-10 (417 nm). The observed photoluminescence enhancement is caused by a combination of intraex-citonic excitation and electron trap liberation. The electron traps are inferred to have a depth of approximately 800 cm~(-1).
机译:捕获杂质的激子的激发态结构是在多位系统中测量的。我们使用一种双色(UV-IR)脉冲光致发光增强技术,该技术可探测掺杂绝缘荧光粉材料中杂质捕获的激子的能级跃迁和动力学。该技术被应用于NaMgF,:Yb〜(2+),其表现出来自两个电荷补偿中心的发射,其峰值位于22300 cm〜(-1)(448 nm)和24000 cm〜(-10(417 nm))。观察到的光致发光增强是由内激发子激发和电子陷阱的释放共同引起的,据推测电子陷阱的深度约为800 cm〜(-1)。

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  • 来源
    《Physical review》 |2013年第10期|104304.1-104304.11|共11页
  • 作者单位

    Department of Physics and Astronomy, University of Canterbury, PB 4800, Christchurch 8140, New Zealand;

    Department of Physics and Astronomy, University of Canterbury, PB 4800, Christchurch 8140, New Zealand;

    Department of Physics and Astronomy, University of Canterbury, PB 4800, Christchurch 8140, New Zealand;

    Department of Physics and Astronomy and MacDiarmid Institute for Advanced Materials and Nanotechnology,University of Canterbury, PB 4800, Christchurch 8140, New Zealand;

    FELIX Free Electron Laser Facility, FOM Institute for Plasmaphysics Rijnhuizen, P.O. Box 1207, 3430 BE, Nieuwegein, The Netherlands;

    Department of Physics and Astronomy and MacDiarmid Institute for Advanced Materials and Nanotechnology,University of Canterbury, PB 4800, Christchurch 8140, New Zealand;

    Debye Institute for NanoMaterials Science, University of Utrecht, P.O. Box 80000, TA 3508 Utrecht, The Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rare-earth ions and impurities; excitons and related phenomena; crystal and ligand fields;

    机译:稀土离子和杂质;激子和相关现象;晶体和配体场;

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