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在 Cs₂ScCl₅·H₂O:Cr³⁺中通过 Te⁴⁺敏感化增强 NIR 排放

Lingkang Yu^1,2, Yining Wang^1,2, Xiaole Xing^1,2

¹. Shenzhen Research Institute of Shandong University, Shenzhen 518063, P. R. China.

Inorganic chemistry

|July 7, 2025

概括

研究人员增强了近红外 (NIR) 辐射在无的Cs₂ScCl₅·H₂O:Cr³⁺通过 Te⁴⁺离子进行配合. 这种方法提高了NIR发光效率,对夜视等应用具有前景.

科学领域:

材料科学材料科学材料科学
无机化学无机化学
固态物理固态物理

背景情况:

无金属化物矿被用于近红外 (NIR) 辐射应用.
在这些材料中实现高效的NIR发射仍然是一个重大挑战.
在合适的矩阵中使用Cr3+注是NIR发光的常见策略.

研究的目的:

为了增强Cr3+化Cs2的近红外 (NIR) 发光,ScCl5·H2O.
为了研究 Te⁴⁺ 离子的配合对 NIR 发射特性的影响.
探索开发材料的潜在应用.

主要方法:

合成Cs₂ScCl₅·H₂O与Cr³⁺进行合,并与Te⁴⁺进行合.
描述光发光的特性,包括NIR发射和光发光量子收益率 (PLQY).
评估涉及自我被困刺激子 (STEs) 的能量传递机制.

主要成果:

与Te⁴⁺离子配合显著增强了来自Cr³⁺的⁴T₂ → ⁴A₂过渡的NIR发射.
光发光量子收益率 (PLQY) 达到11.02%.
与单独使用Cr3+的样本相比,观察到NIR发射强度增加了3倍,以及新的黄色发射.

结论:

使用Te⁴⁺的Codoping是一种有效的策略,可以促进无Cs₂ScCl₅·H₂O:Cr³⁺中的NIR发射.
Cs₂ScCl₅·H₂O矩阵的弱对称性对宽带NIR发射有好处.
该材料显示了在非破坏性测试和夜视领域的应用潜力.

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