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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/vibronic transition and thermal quenching behavior
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Narrow-band red-emitting KZnF3:Mn4+ fluoroperovskites: insights into electronic/vibronic transition and thermal quenching behavior

机译：窄带红发KZNF3：MN4 +萤石夫人：电子/振动过渡和热淬火行为的见解

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摘要

Mn ~(4+) activated fluoride is known for its unique spectral features and low lost, meeting the urgent requirements for w-LED applications, especially in the field of wide-color-gamut backlights. Despite the ever-growing family, insightful investigations on the host-dependent electronic/vibronic transition and thermal quenching behavior of Mn ~(4+) are insufficient. In this work, a new red-emitting KZnF _(3) :Mn ~(4+) fluoroperovskite is synthesized via a facile co-precipitation method. Systematical studies are performed on its microstructure, electronic structure, and spectroscopic properties. By virtue of high-resolution spectroscopy down to 10 K, both the electronic/vibronic transitions for Mn ~(4+) and [F _(2) ~(?) ] defect centers are identified, the slight distortion of the [MnF _(6) ] ~(2?) octahedron deviating from O _(h) symmetry is disclosed, and multiple crystallographic site occupation of Mn ~(4+) is demonstrated. Moreover, a comparative study on the thermal quenching behavior of different fluoride hosts with nominal O _(h) symmetry reveals its close dependence on the ~(4) T _(2g) energy position in a configurational coordinate model and provides a rule of thumb to select an appropriate host with good thermal stability.
机译：Mn〜（4+）可激活的氟化物是其独特的光谱特性和低损失，符合W-LED应用的迫切要求，尤其是在宽色域背光领域。尽管家庭不断增长，但对宿主依赖的电子/振动过渡和Mn〜（4+）的热猝灭行为的富有识别性研究不足。在这项工作中，通过容易共沉淀法合成了一种新的红发KZNF _（3）：Mn〜（4+）氟代渣。对其微观结构，电子结构和光谱性能进行系统研究。凭借高分辨率光谱到10 k，鉴定了Mn〜（4+）和[F _（2）〜（Δ）]缺陷中心的电子/振动转变，缺陷中心，[MNF _ （6）]〜（2？）偏离O _（h）对称性的八面体，并证明了Mn〜（4+）的多个晶体位点占用。此外，对具有标称O _（H）对称的不同氟化物宿主的热猝灭行为的比较研究揭示了它在配置坐标模型中的〜（4）T_（2G）能量位置的密切依赖性，并提供了一个拇指的规则选择具有良好热稳定性的适当主机。

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    Tao Hu; Hang Lin; Fulin Lin; Yan Gao; Yao Cheng; Ju Xu; Yuansheng Wang;

  • 作者单位

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

    CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian P. R. China;

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  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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