JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Wenlu Pan,Qun Zeng,Kai Li,Wei Lü
Tuning the luminescence properties of efficient near-infrared (NIR) phosphors is critical to expanding their applications in NIR spectroscopy. In this paper, a series of novel Cr 3+ -doped LaZnAl 11 O 19 (LZAO: Cr 3+ ) phosphors are synthesized via a high-temperature solid-phase method. These phosphors exhibit NIR emission in the range of 650–900 nm, with the LZAO: 0.10Cr 3+ achieves an excellent internal quantum efficiency (IQE) of 89.9 %. Notably, it demonstrates excellent thermal stability, maintaining 97.2 % of the initial photoluminescence intensity at 513 K. Through co-doping with Nd 3+ , the NIR emission broadens across the 650–1100 nm range, and leads to a substantial enhancement in Nd 3+ emission intensity due to efficient Cr 3+ →Nd 3+ energy transfer. Remarkably, the optimum LZAO: Cr 3+ , Nd 3+ phosphor exhibits a high IQE (82 %) and an outstanding anti-thermal quenching behavior (118.0 % @ 513 K), with the underlying mechanism of its thermal stability further elucidated through defect level model. In addition, the synthesized phosphors show great promise for multifunctional applications in NIR phosphor-converted light emitting diodes, plant growth lighting, non-destructive testing, luminescence thermometry and solar cells.
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高影响因子
Journal of Materials Chemistry C
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2019
·Vol. 7
·期 21
·6301-6307
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IF 6.641
Puxian Xiong,Mingying Peng
Mechanoluminescence (ML) from most state-of-the-art phosphors primarily appears within the spectral range of ultraviolet to visible and does not lie in the biological transparency windows, therefore limiting its application in biological fields. In this study, we report a novel Nd3+ doped LiNbO3 phosphor, which demonstrates intense and elastic near infrared (NIR) ML under compressive forces. The ML intensity increases with force from 500 to 2500 N, and it remains stable under larger forces due to the failure of the resin. Both the starting and stopping of force loading are found to trigger ML, but the intensity is weakened over time. Meanwhile, this ML emission, peaking at 895 nm, is located within the first biological transparency window range (650–950 nm), and it has been proved to penetrate tissue thicker than 20 mm. This, therefore, extends ML into the NIR range and makes it possible to detect biomechanical behavior in situ inside living bodies.
研究领域:
材料科学
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光学
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生物医学工程
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高影响因子
JOURNAL OF RARE EARTHS
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2025
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IF 7.2
Yafen Wu,Sheng Wu,Puxian Xiong,Shouping Wang
Mechanoluminescence (ML) materials have made significant progress in flexible sensing and human–computer interaction due to their unique “force-to-light” conversion properties. However, most ML materials are limited to the visible light spectral band and single triggering mechanisms, limiting their practical applications in bioimaging and medical non-destructive detection. Here, a near-infrared (NIR) ML material Sr 3 Sn 2 O 7 :0.01Nd 3+ with multi-mode physical stimuli response is reported. Under friction and compression mechanical stimuli, the ML intensity of Sr 3 Sn 2 O 7 :0.01Nd 3+ is linearly positively correlated with the applied load, showing excellent stress-sensing performance. At the same time, the Sr 3 Sn 2 O 7 :0.01Nd 3+ ML material can penetrate different biological tissues up to 10 mm thick and realize the non-destructive detection of components in various transparent liquids. In addition, non-invasive blood lipid detection can be potentially obtained for patients through the absorption characteristics of oils and fats for NIR light signals. These research results indicate the broad application prospects of Sr 3 Sn 2 O 7 :0.01Nd 3+ in bioimaging, health monitoring, and non-destructive detection, and it provides a basis for developing new medical non-invasive detection technologies.
研究领域:
生物医学工程
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分子影像学
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材料科学
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生物光子学
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医学诊断技术
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高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Xinlong Shang,Yang Li,Liang Chen,Quan Zhang,Leidang Zhou,Naizhe Zhao,Fangbao Wang,Jinlu Ruan,Shiyi He,Yapeng Zhang,Xue Du,Silong Zhang,Zhongfu An,Xiaoping Ouyang
Fast-response scintillators play a crucial role in rapid radiation detection, wherein two-dimensional (2D) perovskites have exhibited substantial potential. Enhancing the carrier confinement within 2D perovskites has been demonstrated to be effective in accelerating their luminescence decay. Despite extensive research employing carrier confinement in the interlayer direction, confinement from the inorganic layers remains relatively unexplored. In this study, intralayer carrier confinement in 2D perovskites is achieved through neodymium (Nd) doping. Centimeter-scale phenethylammonium lead bromide (PEA 2 PbBr 4 , PPB) single crystals doped with Nd 3+ are fabricated via a solution-based method. Compared to the undoped counterparts, their photoluminescence (PL) decay is markedly accelerated. Notably, the reduction in decay time is more pronounced for α rays than for γ rays , enabling the doped PPB to exhibit distinct luminescent decay characteristics for α and γ rays . This property is verified through the waveforms of single α particles and γ photons, highlighting the potential for enhanced pulse shape discrimination (PSD) between different radiation types. First-principles calculations reveal that Nd 3+ doped PPB exhibits a higher effective mass and enhanced carrier localization, signifying stronger carrier confinement. This study elucidates the impact of Nd 3+ doping on reducing the luminescent lifetime of 2D perovskite single crystals, and offers an approach to differentially regulating their scintillating decay response for high-energy particle discrimination.
研究领域:
材料科学
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光电子学
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辐射探测
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钙钛矿物理
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固态化学
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2025
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IF 3.5
Y.T. Liu,Y. Ji,W.J. Zhu,Q. Qian,Q.Y. Zhang
0.9 μm fiber lasers enable efficient generation of blue laser via second-harmonic conversion, which are essential light sources for applications such as undersea communications, laser displays, and biophotonic imaging. Glass fibers doped with Nd 3+ ions serve as the gain medium for these lasers; however, the competition from the four-energy-level transition 4 F 3/2 → 4 I 11/2 remains a significant challenge. Fluorophosphate (FP) glass combines the high rare-earth solubility of phosphate glasses with the low phonon energy of fluoride, particularly benefiting from large crystal field strength that enhances the 4 F 3/2 → 4 I 9/2 transition. Nonetheless, crystallization and phase separation in FP glass pose substantial challenges for this multi-component glass system. Herein, a novel Nd 3+ -doped Sr(PO 3 ) 2 −Ba(PO 3 ) 2 −AlF 3 −MgF 2 glass is reported. A thermodynamic approach was employed to predict the glass-forming region of the Sr(PO 3 ) 2 −AlF 3 −MgF 2 system, providing a robust design framework for FP compositions with superior glass-forming ability. Further investigations into the gradual substitution of Ba(PO 3 ) 2 to Sr(PO 3 ) 2 elucidate the structure-property relationship between the local network environment and Nd 3+ emission at 0.9 µm. The optimized FP glass demonstrates remarkable stability against crystallization (Δ T >100 °C), a high branching ratio (47.2 %), a large emission cross-section (2.36 × 10 −20 cm 2 ), an extended lifetime (334 μs), a high spectral quality factor (7.88 × 10 −24 cm 2 ·s), and a broad gain bandwidth (10.71 × 10 −26 cm 3 ) at 0.9 μm, surpassing previously reported glass hosts and establishing it as a highly promising host material for 0.9 μm fiber laser applications.
研究领域:
光子学
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材料科学
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光学材料
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激光技术
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玻璃科学
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yuxiang Xin,Xiachu Xiao,Jianru Wang,Nadeem Abbas,Shuo Zhang,Yibo Han,Jiang Tang,Artiom Skripka,Zhuolei Zhang
The development of multifunctional luminescent materials with tunable upconversion (UC), downshifting (DS), and thermally responsive emissions in a single host is essential for next-generation photonic and optoelectronic technologies. Here, we report a Nd 3+ -based low-phonon-energy lead-free halide double perovskite, Cs 2 NaNdCl 6 , which overcomes key limitations of conventional halide double perovskites, including doping inflexibility, concentration quenching, and lack of integration of diverse optical functionalities. Leveraging the large unit cell and the dual role of Nd 3+ as both emitter and sensitizer, we achieve efficient high-concentration doping of Tm 3+ , Er 3+ , and Yb 3+ without compromising emission intensity. Tm 3+ doping induces energy back transfer to Nd 3+ , leading to an 8.2-fold enhancement in the orange emission of Nd 3+ ions. Co-doping with Er 3+ /Yb 3+ enables excitation-dependent, color-tunable UC (green, orange, red) under 980 nm excitation, stable green UC emission under 808 nm excitation, and red DS emission under 365 nm excitation, useful for advanced anti-counterfeiting applications. Furthermore, the synergistic incorporation of multiple lanthanides facilitates multi-level fluorescence intensity ratio (FIR) thermometry via thermally coupled levels (TCLs), non-thermally coupled levels (non-TCLs), and Stark-split transitions, achieving a record relative sensitivity (S r ) of 11.4% K −1 in the 80–340 K temperature range. These findings establish Cs 2 NaNdCl 6 as a versatile platform for multifunctional lattice-engineered photonics.
研究领域:
光子学
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光电子材料
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发光材料
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光学传感
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防伪技术
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稀土掺杂
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固态化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xiangling Tian,Zhijun Ma,Jianrong Qiu,Rongfei Wei
Optical fibers have been formed by replacing precursor glass core with precursor ceramic core, in which drawing process, the precursor ceramic melted to fill the space of the core region while the clad glass was softened. Nd 3+ doped LaNbO 4 nanocrystals were precipitated in the core after heat treatment. X-ray diffraction, Raman spectra, high-resolution transmission electron microscopy, electron paramagnetic resonance, optical microscope, and photoluminescence were used to characterize the obtained fiber. No crystallization, cracking, bubble, or undissolved substance is observed in the core region of precursor fiber. Nd 3+ doped LaNbO 4 nanocrystals are precipitated in the core region after thermal treatment. Under the pumping source of 808 nm, three emission bands located at ∼887 nm, ∼1064 nm, and ∼1337 nm are observed, which makes this GC fiber a promising material for the NIR fiber amplifier.
研究领域:
材料科学
·
光学
·
光子学
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DOI
高影响因子
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