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Europium Ions Self-Reduction Benefiting from AlO4/Si(Al)O4 Network Structure for Multimode Optical Thermometry Manometry
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-06-14 , DOI: 10.1002/lpor.202400409 Ruiying Lu 1 , Xinyao Zhang 1 , Yuanyuan Fang 2 , Xue Wu 1 , Mochen Jia 3 , Kai Wang 2 , Jinfei Wu 2 , Qian Li 2 , Zhen Sun 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-06-14 , DOI: 10.1002/lpor.202400409 Ruiying Lu 1 , Xinyao Zhang 1 , Yuanyuan Fang 2 , Xue Wu 1 , Mochen Jia 3 , Kai Wang 2 , Jinfei Wu 2 , Qian Li 2 , Zhen Sun 1
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Mixed-valence europium ions-activated phosphors have distinct advantages in color modulation, dynamic anti-counterfeiting, and optical sensors. Nevertheless, it is still a challenge to obtain mixed-valence europium ions in single compounds by facile self-reduction. Herein, the crystal structure of a 3D hexagonal network formed by SiO4/AlO4 tetrahedra is demonstrated to play a significant role in the spontaneous reduction of Eu3+ to Eu2+ based on SrAl2Si2O8, Sr2SiO4, SrAl2O4 hosts. The crystal field theory and Judd-Ofelt theory provide a deeper understanding of Eu2+ and Eu3+ luminescence behavior, namely, the low energy spectra of Eu2+ are more easily observed in crystal structure with high polarizability and octahedral coordination, whereas the spectra properties of Eu3+ are affected by the symmetry of local environment and crystal rigidity. For SrAl2Si2O8: 0.02Eu2+/Eu3+, multi-mode thermometry is explored in terms of the luminescence intensity ratio (LIR) of Eu2+/Eu3+, luminescence intensity (LI) and full-width at half maximum (FWHM) of Eu2+ with maximal relative sensitivity reaching 3.83% K−1. This study presents the first exploration of optical manometry based on the LIR mode of Eu2+/Eu3+ with excellent sensitivity (Sr = 18.13% GPa−1). This work not only provides a novel strategy for the design of mixed-valence ions-activated materials but also constructs promising optical thermometry, and manometry candidates.
中文翻译：
铕离子自还原受益于多模光学测温测压的 AlO4/Si(Al)O4 网络结构
混合价铕离子激活荧光粉在色彩调制、动态防伪、光学传感器等方面具有明显的优势。然而，通过简单的自还原获得单一化合物中的混合价铕离子仍然是一个挑战。本文证明，由 SiO 4 /Al2O 4 四面体形成的 3D 六方网络晶体结构在 Eu 3+ 的自发还原中发挥着重要作用。以SrAl 2 Si 2 O 8 、Sr 2 SiO 4 b8> 、SrAl 2 O 4 宿主。晶体场理论和Judd-Ofelt理论为Eu 2+ 和Eu 3+ 发光行为提供了更深入的理解，即Eu 2+ 的低能谱为在具有高极化率和八面体配位的晶体结构中更容易观察到Eu 3+ 的光谱特性，而Eu 3+ 的光谱特性受局域环境的对称性和晶体刚性的影响。对于 SrAl 2 Si 2 O 8 : 0.02Eu 2+ /Eu 3+ ，多模测温为从Eu 2+ /Eu 3+ 的发光强度比（LIR）、Eu 2+ 最大相对灵敏度达到3.83% K −1 。本研究首次探索了基于Eu 2+ /Eu 3+ LIR模式的光学测压，具有出色的灵敏度（S r = 18.13% GPa −1 ）。这项工作不仅为混合价离子激活材料的设计提供了一种新颖的策略，而且还构建了有前途的光学测温和测压候选材料。
更新日期：2024-06-15
中文翻译：
铕离子自还原受益于多模光学测温测压的 AlO4/Si(Al)O4 网络结构
混合价铕离子激活荧光粉在色彩调制、动态防伪、光学传感器等方面具有明显的优势。然而，通过简单的自还原获得单一化合物中的混合价铕离子仍然是一个挑战。本文证明，由 SiO 4 /Al2O 4 四面体形成的 3D 六方网络晶体结构在 Eu 3+ 的自发还原中发挥着重要作用。以SrAl 2 Si 2 O 8 、Sr 2 SiO 4 b8> 、SrAl 2 O 4 宿主。晶体场理论和Judd-Ofelt理论为Eu 2+ 和Eu 3+ 发光行为提供了更深入的理解，即Eu 2+ 的低能谱为在具有高极化率和八面体配位的晶体结构中更容易观察到Eu 3+ 的光谱特性，而Eu 3+ 的光谱特性受局域环境的对称性和晶体刚性的影响。对于 SrAl 2 Si 2 O 8 : 0.02Eu 2+ /Eu 3+ ，多模测温为从Eu 2+ /Eu 3+ 的发光强度比（LIR）、Eu 2+ 最大相对灵敏度达到3.83% K −1 。本研究首次探索了基于Eu 2+ /Eu 3+ LIR模式的光学测压，具有出色的灵敏度（S r = 18.13% GPa −1 ）。这项工作不仅为混合价离子激活材料的设计提供了一种新颖的策略，而且还构建了有前途的光学测温和测压候选材料。
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