JOURNAL OF LUMINESCENCE
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2024
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IF 3.3
Xiaoyu Wu,Yang Yu,Kejie Li,Mingqin Huang,Zuoling Fu
The near-infrared-II (NIR-II) fluorescence thermometer based on rare earth-doped double perovskite is rarely. Herein, Er 3+ -Ho 3+ and Yb 3+ co-doped lead-free double perovskite La 2 MgTiO 6 (LMTO) phosphors were synthesized by a conventional high temperature solid phase method. The phase purity and morphology of the samples were analyzed using XRD and FE-SEM. The NIR-II luminescence properties of LMTO: Er 3+ -Ho 3+ -Yb 3+ phosphors were systematically investigated under laser irradiation at 980 nm. A NIR-II fluorescence thermometer was also designed based on non-thermal coupled energy levels originated from the 4 I 13/2 energy level of Er 3+ and the 5 I 6 energy level of Ho 3+ . The maximum value of relative sensitivity (S r ) was 0.54 % at 513 K. Compared to visible thermometers (LMTO: Er 3+ -Yb 3+ and LMTO: Ho 3+ -Yb 3+ ), the NIR-II thermometers offer better temperature measurement capability and penetration depth. All the experimental results show that the NIR-II thermometer with a wider range and higher sensitivity has been realized, which puts forward a new idea for the design and optimization of NIR-II thermometers.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 15
·4711-4720
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IF 6.1
Zhexuan Gao,Yi Zhang,Yinyan Li,Shilong Zhao,Peng Zhang,Xiaolong Dong,Degang Deng,Shiqing Xu
The second near-infrared window (NIR-II, 1000–1700 nm) emitting phosphor is a key component for the phosphor-converted light-emitting diode (pc-LED), which has garnered significant attention. However, it remains a major challenge to discover efficient NIR-II broadband phosphors that can be excited by blue LEDs. Herein, Cr3+ and Ni2+ ions were co-doped into the Li2ZnSn3O8 (LZSO) host. LZSO:Cr3+,Ni2+ phosphor achieves a broadband NIR-II emission peak at 1465 nm with a large full width at half maximum (FWHM) of 300 nm and internal quantum efficiency (IQE) of 43.31% under excitation at 426 nm because of the efficient energy transfer (ET) from Cr3+ to Ni2+. In addition, a dual-emissive doped phosphor across the NIR-I (700–1000 nm) and NIR-II regions with a higher sensitivity at physiological temperatures was obtained. The relative sensitivity value (Sr) reaches 1.44% K−1 at 293 K, indicating that the LZSO:Cr3+,Ni2+ phosphor is a potential candidate for NIR optical thermometers in biotechnological applications. The manufactured NIR-II pc LED provides a radiative flux of 8.26 mW with a photoelectric conversion efficiency of 2.71% at a drive current of 100 mA and has promising potential in night vision, medical imaging, and spectral analysis applications.
研究领域:
材料科学
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生物医学工程
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光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 17
·10564-10569
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IF 3.108
Xiaowen Zhang,Yang Li,Zhongliang Hu,Zhi Chen,Jianrong Qiu
The second near-infrared window (NIR-II, 1000–1400 nm) is ideal for fluorescence imaging owing to negligible tissue scattering and minimal autofluorescence. NIR-II luminescence nanophosphors are promising materials for fluorescence imaging. Mn5+ is emerging as a new luminescent indicator owing to its typical NIR-I (800 nm) to NIR-II (1190 nm) downconversion luminescence. Herein, we report a facile synthesis approach to prepare Mn5+ doped Ba3(MO4)2 (M = V, P) nanoparticles with a remarkably sharp emission peak around 1190 nm in the NIR-II region for the first time to our knowledge. The developed two-step approach based on efficient anion exchange reaction is able to not only stabilize the valence but also keep the controlled morphology and uniform size. It is highly possible that the general approach will provide a new perspective on synthesizing special valence ion doped nanosized materials.
研究领域:
材料科学
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生物医学工程
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光学成像
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Jianhao Zheng,Pengye Du,Ran An,Yuan Liang,Yi Wei,Shuyu Liu,Xinyu Wang,Pengpeng Lei,Shuyan Song,Hongjie Zhang
Fluorescence thermometry based on metal halide perovskites is increasingly becoming a hotspot due to its advantages of high detection sensitivity, noninvasiveness, and fast response time. However, it still presents certain technical challenges in practical applications, such as complex synthesis methods, the use of toxic solvents, and being currently mainly based on the visible/first near-infrared light with poor penetration and severe autofluorescence. In this study, we synthesize the second near-infrared (NIR-II) luminescent crystals based on Yb3+/Nd3+-doped zero-dimensional Cs2ScCl5·H2O by a simple “dissolve–dry” method. The whole synthesized process does not involve high temperatures or high pressures. Cs2ScCl5·H2O/Yb3+,Nd3+ has an optimum fluorescence performance when the Yb3+/Nd3+ doping amount is 15%/20%. The emission intensity ratio attributed to Yb3+ and Nd3+ varies with temperature, and this variation is exacerbated due to the fact that the 2F5/2 energy level of Yb3+ can be effectively aligned with the O–H bond stretching vibration energy of coordinating water molecules to facilitate energy transfer. Ultimately, the crystals can act as self-referenced ratiometric NIR-II luminescent thermometers with a maximum relative sensitivity of 1.66% K–1 at 323 K. This work highlights the advantages of NIR-II luminescent materials for temperature sensing, which is significant for advancement in the field of noncontact thermometers.
研究领域:
材料科学
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光学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Kejie Li,Haikuo Liu,Zhiying Wang,Mengmeng Dai,Jiaqi Zhao,Zuoling Fu
Near-infrared II (NIR-II, 1000–1700 nm) luminescence has emerged as a powerful tool for biomedical applications, including sensing, imaging, and drug delivery, owing to its superior tissue penetration depth and high spatial resolution. Lanthanide-based NIR-II nanoprobes are particularly promising due to their outstanding photostability and minimal cytotoxicity. However, two critical challenges impede their widespread implementation: severe thermal quenching at elevated temperatures and inefficient downshifting processes. Herein, a novel strategy is reported to address these limitations by precisely modulating energy transfer dynamics between Ho 3+ and Pr 3+ ions in NaYF 4 core–shell engineering. By carefully optimizing the concentration ratio and spatial distribution of these lanthanide ions in NaYF 4 core–shell nanocrystals, the population of 1 G 4 (Pr 3+ ) is significantly increased, effectively suppressing thermal quenching while boosting downshifting efficiency. The optimized system leverages dual NIR-II emission channels ( 1 G 4 and 5 I 6 ) in NaYF 4 :Yb 3+ /Ho 3+ @NaYF 4 :Yb 3+ /Pr 3+ nanocrystals, enabling ultrasensitive temperature sensing with a maximum relative sensitivity ( S r ) of 2.03% K −1 . Furthermore, the synergistic up/down-conversion properties of Ho 3+ and Pr 3+ facilitate multimodal anti-counterfeiting, offering a robust platform for advanced information encryption and storage. This work not only establishes a new paradigm for engineering NIR-II luminescence but also underscores their vast potential in advanced applications, from precision biosensing to high-security encoding technologies.
研究领域:
纳米技术
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材料科学
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生物医学工程
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光学
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传感器
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发光
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）