Near-infrared luminescence from Li2ZnGeO4:Ln3+ (Ln = Er, Tm, Ho)

IF 4.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

RSC Advances Pub Date : 2025-03-21 DOI:10.1039/D4RA07999J

Nikola Bednarska-Adam, Marta Kuwik, Tomasz Goryczka, Vitalii Ivanov, Józef Dresner, Wojciech A. Pisarski and Joanna Pisarska

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Abstract

In this work, ceramic compounds Li₂ZnGeO₄:Ln³⁺ (Ln = Er, Tm, Ho), belonging to the family of germanate olivines, were studied. The structural properties were examined using X-ray diffraction, scanning electron microscopy, IR and Raman spectroscopy. Near-infrared luminescence spectra showed that the bands located in the spectral range of 1400–2100 nm were due to the electronic transitions of lanthanide ions: ⁴I_13/2 → ⁴I_15/2 (Er³⁺), ³H₄ → ³F₄ and ³F₄ → ³H₆ (Tm³⁺), and ⁵I₇ → ⁵I₈ (Ho³⁺). Decay curve analysis indicated that the near-infrared luminescence from the excited states of lanthanide ions in Li₂ZnGeO₄ was relatively long-lived. The results suggest that germanate olivines Li₂ZnGeO₄:Ln³⁺ (Ln = Er, Tm, Ho) are promising inorganic phosphors and can be successfully used as ceramic sources emitting near-infrared radiation.

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Li2ZnGeO4:Ln3+ （Ln = Er、Tm、Ho）的近红外发光特性

本文研究了锗酸橄榄石家族的陶瓷化合物Li2ZnGeO4:Ln3+ (Ln = Er, Tm, Ho)。利用x射线衍射、扫描电镜、红外光谱和拉曼光谱对其结构性质进行了表征。近红外发光光谱显示，在1400 ~ 2100 nm的光谱范围内，镧系离子发生了电子跃迁：4I13/2→4I15/2 （Er3+）、3H4→3F4、3F4→3H6 （Tm3+）、5I7→5I8 （Ho3+）。衰减曲线分析表明，Li2ZnGeO4中镧系离子激发态的近红外发光寿命较长。结果表明，锗酸橄榄石Li2ZnGeO4:Ln3+ (Ln = Er, Tm, Ho)是一种很有前途的无机荧光粉，可以成功地用作近红外辐射的陶瓷源。

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来源期刊

RSC Advances chemical sciences-

CiteScore

7.50

自引率

2.60%

发文量

3116

审稿时长

1.6 months

期刊介绍： An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.