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首页> 外文期刊>RSC Advances >Structural phase transition and photoluminescence properties of wurtzite CdS:Eu3+ nanoparticles under high pressure
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Structural phase transition and photoluminescence properties of wurtzite CdS:Eu3+ nanoparticles under high pressure

机译：紫立岩CDS的结构相转变和光致发光性质：高压下Eu3 +纳米颗粒

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摘要

High-pressure behaviors of wurtzite CdS and CdS: Eu3+ nanoparticles (8-10 nm) were investigated by synchrotron radiation X-ray diffraction, Raman spectroscopy, and photoluminescence under high pressure at ambient temperature. The doping of Eu ions increases the phase transition pressure from wurtzite structure to rocksalt structure (CdS = 4.76 GPa and CdS: Eu = 5.22 GPa) and so does the bulk modulus (B-0) of the initial and high pressure phases. This phenomenon can be attributed to the great impact on tensile strain along the c-axis of CdS nanoparticles, which is identified by the relationship of lattice contraction and the pressure obtained from Raman 1LO. The phase transitions of all samples are partly reversible. The Eu3+ ions luminescence from D-5(0) -> F-7(J) (J = 1, 2) transition in CdS: Eu nanoparticles emerges obviously and changes during the phase transformation, which indicate the variation of the local symmetry of the Eu3+ ions. The new peak of D-5(0) -> F-7(3) emerges at 7.26 GPa, persisting until the end of the whole experiment. The obtained CdS nanoparticles will hold promising potential in the fabrication of effective biological sensors and photodetectors for practical application under high pressure.
机译：通过在环境温度下的高压下，通过同步辐射X射线衍射，拉曼光谱和光致发光来研究紫立岩CDS和Cds的高压行为：Eu3 +纳米粒子（8-10nm）。 Eu离子的掺杂增加了来自紫立岩结构的相变压力，以摇滚抗体结构（Cds = 4.76GPa和Cds：Eu = 5.22GPa），并且初始和高压相的体积模量（B-0）也是如此。这种现象可以归因于沿CDS纳米颗粒的C轴的抗拉应变产生的重大影响，其通过晶格收缩和从拉曼110获得的压力的关系来鉴定。所有样品的相变部分是可逆的。 CDS中的D-5（0） - > F-7（J）（J = 1,2）转变的EU3 +离子发光：EU纳米粒子明显出现并在相变期间变化，表明局部对称的变化Eu3 +离子。 D-5（0） - > F-7（3）的新峰出现在7.26GPa，持续直到整个实验结束。所获得的Cds纳米颗粒将在高压下制造有效生物传感器和光电探测器的承担有希望的潜力。

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  • 来源
    《RSC Advances》 |2017年第50期|共8页
  • 作者

    Zhao Rui; Yang Tianye; Luo Yang; Chuai Mingyan; Wu Xiaoxin; Zhang Yanyan; Ma Yanzhang; Zhang Mingzhe;

  • 作者单位

    Jilin Univ State Key Lab Superhard Mat Changchun 130012 Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Changchun 130012 Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Changchun 130012 Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Changchun 130012 Peoples R China;

    Ctr Hight Pressure Sci &

    Technol Adv Res Changchun 130012 Peoples R China;

    Ctr Hight Pressure Sci &

    Technol Adv Res Changchun 130012 Peoples R China;

    Ctr Hight Pressure Sci &

    Technol Adv Res Changchun 130012 Peoples R China;

    Jilin Univ State Key Lab Superhard Mat Changchun 130012 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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