JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·Vol. 103
·期 10
·103028
·
IF 3.4
Yan Xu,Youjia Wang,Dongyan Bao,Jie Zhang,Mingjun Song
A new double-perovskite structured phosphor, Sr 2 MgWO 6 : xCr 3+ , yYb 3+ , with device potential has been successfully synthesized. • The phosphor exhibits emission performance covering the NIR-I to NIR-II regions, with a wavelength range exceeding 400 nm. • This phosphor exhibits excellent thermal stability, and the optical temperature-sensing performance was investigated using FIR. • The phosphor exhibits a Cr 3+ -Yb 3+ energy transfer efficiency (η ET ) exceeding 50%. Near-infrared (NIR) phosphors have shown great potential for applications in temperature sensing, night vision surveillance, agricultural illumination, and so on. In this study, a series of Sr 2 MgWO 6 (SMW): xCr 3+ , yYb 3+ phosphors were synthesized via a conventional high-temperature solid-state reaction method. Firstly, the effects of Mg 2+ content variation on the luminescent properties of Cr 3+ singly doped phosphors were systematically investigated. It was found that the quantum efficiency of the samples reached a maximum when the Mg 2+ content was 120% of the stoichiometric ratio, attributed to the optimization of local crystal field environment around Cr 3+ ions. On this basis, Cr 3+ -Yb 3+ co-doped phosphors were further optimized by introducing Yb 3+ ions, and the optimal composition was determined to be SMW: 0.5% Cr 3+ , 1.5% Yb 3+ . Under 360 nm excitation, the optimized phosphor exhibited intense NIR emission covering the wavelength range of 713-1137 nm. Benefiting from an exceptionally efficient Cr 3+ →Yb 3+ energy transfer (η ET = 50.18%) achieved at a low Yb 3+ concentration of only 3.0%, the optimized phosphor exhibits a significantly broadened emission bandwidth and enhanced NIR output intensity. Furthermore, the thermal stability of the optimal sample was evaluated by temperature-dependent emission spectra. The results revealed excellent luminescence stability of the phosphor at elevated temperatures. Notably, based on the fluorescence intensity ratio (FIR) between Cr 3+ and Yb 3+ emissions extracted from the variable-temperature spectra, a self-referencing optical temperature sensor was constructed. The absolute and relative sensitivities were calculated, demonstrating the feasibility of the developed phosphor for non-contact temperature sensing applications. Additionally, performance tests on pc-LEDs confirmed their excellent spectral stability, indicating the material's potential for practical applications in NIR pc-LEDs. This work provides a promising strategy for designing broadband NIR-emitting phosphors with dual functionalities of lighting and temperature sensing. Download: Download high-res image (255KB) Download: Download full-size image
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JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Lin Lin,Zhipeng Yu,Zhezhe Wang,Zhuohong Feng,Feng Huang,Lili Huang,Qionghua Dai,Fengfen Zhang,Zhiqiang Zheng
Au@SiO 2 /NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nanocomposites are acquired by combining Au@SiO 2 nanorods with ligand-free NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nano-particles in water solution due to the electrostatic attraction. Plasmon-enhanced upconversion (UC) and quantum-cutting (QC) are both obtained and optimized in these nanocomposites by adjusting SiO 2 shell thickness and concentrations of Au@SiO 2 . While the thickness of SiO 2 shell is 35 nm, the enhancement factor of UC and QC reaches maximum as 1.91 and 3.47 times, respectively. The nanocomposites may be applied in biological fluorescence label, super-resolution imaging and solar cells, etc.
研究领域:
纳米技术
·
光学
·
材料科学
·
生物医学工程
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CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Juan Wang,Tianzhi Jiang,Danyang Shen,Renguang Ye,Youjie Hua,Hangqi Li,Caixia Song,Junhao Wu,Hongping Ma,Chenxia Li,Degang Deng,Shiqing Xu
The size of lanthanide upconversion nanocrystals has a considerable impact on their luminous characteristics, but the underlying mechanism is yet unknown. Six typical samples were chosen for systematic size effect experiments after we manufactured monodisperse Y 2 O 2 S: Er 3+ /Yb 3+ microspheres. Our results establish surface defects induced by specific surface area as the fundamental mechanism governing nanoscale structure-property correlations, showing that phosphor particle size can be directionally controlled to maximize both luminescent performance and temperature-sensing capabilities. We have identified the mechanism behind size-dependent optical properties: larger particles alter the emission color and significantly enhance the luminescence intensity. Temperature-sensing behavior also exhibits strong size dependence: absolute sensitivity (S a ) correlates negatively with size and positively with temperature at the thermally coupled level (TCL); at the non-thermally coupled level (NTCL), S a correlates negatively with both size and temperature. It's interesting to note that the S a value for the smallest sample is 17 times higher at TCLs, reaching 0.0866 K -1 . Our findings provide a clear fundamental understanding of size effects in nanoscale lanthanide upconversion luminescence and offer important insights for nanoscale temperature sensing.
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Materials Today Chemistry
·
2024
·
IF 6.7
Guocheng Pan,Yiheng Yue,Jianfeng Wang,Zhenping Wu,Shiqing Xu,Gongxun Bai
Near-infrared (NIR) phosphors have garnered notable attention for their extensive applications in anti-counterfeiting, optical imaging , non-invasive medical diagnosis and detection. Nevertheless, the quest for NIR phosphors with outstanding detection and sensing capabilities remains a challenge. In this study, we have successfully prepared Ga 1.6 Mg 0.2 Ge 0.2 O 3 :Cr 3+ ,Yb 3+ NIR phosphors by codoping and substitutation strategies. When incorporated into polydimethylsiloxane films, these phosphors demonstrated a direct correlation between luminescence intensity ratio and applied stress under 450 nm excitation. Moreover, variations in luminescence spectra occurred with different compositions and concentrations of liquids coated on the film, facilitating both force measurement and composition analysis . Furthermore, a NIR phosphor-converted light-emitting diode (pc-LED) was fabricated by integrating phosphor with a blue LED chip, exhibiting excellent performance. Utilizing the prepared NIR pc-LED as a light source , we facilitated non-destructive imaging, night vision, and anti-counterfeiting applications with an infrared camera. These findings suggest that the synthesized NIR phosphors possess hold promise for diverse detection and sensing applications.
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RSC Advances
·
2017
·Vol. 7
·期 76
·48238-48244
·
IF 3.108
Jiangyun Dai,Chao Yang,Hong Zhang,Hua Zhang,Guoying Feng,Shouhuan Zhou
The successful synthesis of rare earth doped nano/microcrystals with the desired morphology, uniform monodispersity, and intense infrared emission is of fundamental significance, and would facilitate their application in infrared emission-related miniaturization and integration in optoelectronics. However, simultaneously controlling the morphology and enhancing the infrared emission through simple and effective methods has not been well explored. In this study, via Ca2+ doping with an optimized concentration of 25 mol% in the hydrothermal solution, irregular NaGdF4:Yb/Er submicrocrystals converted into highly uniform submicrorods. Meanwhile, an obvious enhancement of visible upconversion (UC) and near-infrared (NIR) downconversion (DC) emission were obtained, probably due to the improved morphology and lowering the local crystal field symmetry around the rare earth ions induced by Ca2+ doping. Furthermore, Ce3+ ions with an optimized concentration of 2 mol% were codoped to intentionally tailor the branching ratio through efficient energy transfer from Er3+ to Ce3+. As a result, the ∼1530 nm emission intensity of the NaGdF4: 25Ca/2Ce/20Yb/2Er submicrorods increased by about 6.4 times in comparison with the NaGdF4:20Yb/2Er counterpart.
研究领域:
材料科学
·
光学工程
·
纳米技术
·
稀土化学
·
光电子学
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高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Li Zhaozhi,Li Yuebin,Zhang Xianghui,Wang Lin,Hu Bo,Zhang Yi,Gu Haoshuang,Chen Wei
Near infrared (NIR)-to-visible upconversion nanoparticles of pure hexagonal phase β-NaYF4: Yb3+, Er3+ nanocrystals were successfully synthesized by a high boiling temperature organic phase synthesis strategy in oleic acid (OA), which acted
as a ligand. The upconversion photoluminescence intensity of the nanocrystals was modulated by varying the reaction temperature and the concentration of sensitizer Yb3+ ions and activator Er3+ ions. The prepared nanocrystals were investigated by transmission electron
microscopy (TEM), X-ray powder diffraction (XRD), and photoluminescence spectroscopy. All the results show that the as-prepared monodispersed upconversion nanocrystals emit high photoluminescence when excited by a 980 nm laser. It was found that the up-conversion emission spectra of β-NaYF4:
Yb3+, Er3+ presented three peaks at about 655, 540, and 521 nm. The optimized concentrations of the sensitizer Yb3+ and the activator Er3+ are 20% and 2% mmol, respectively. These highly efficient nanocrystals have exhibited great potential in bioimaging
and photoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
光子学
·
发光光谱学
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高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Lipeng Huang,Ruiqi Shi,Kaihui Zhang,Xulong Lv,Xihui Shan,Shihai Miao,Tao Wang,Yanjie Liang
Broadband short-wave infrared (SWIR) light sources are essential for advanced applications such as spectroscopy, optical communication, anti-counterfeiting, and biological imaging. However, the advancement of SWIR emitters still faces significant challenges, including limited emission bandwidths, insufficient luminescence efficiency, and unsatisfactory device compatibility. Here, we report an efficient broadband SWIR-emitting phosphor, Yb 3 Ga 5 O 12 :Cr 3+ , Ni 2+ , enabled by the Cr 3+– Yb 3+ energy shuttle design. The cooperative energy transfer from Cr 3+ to Yb 3+ and subsequently to Ni 2+ produces a broad emission spanning 900–1600 nm, with an intense Ni 2+ SWIR luminescence peaking at ∼1400 nm and high internal/external quantum efficiency of 43.1%/23.1%. Heavy doping of Cr 3+ (35%) yields optimum SWIR emission, suppressed non-radiative losses, and a prolonged Ni 2+ lifetime (∼1.064 ms), confirming the efficient multi-ion energy transfer pathway. The phosphor-converted broadband SWIR LED prototype device by a combination of 450 nm blue LED and the optimized Yb 3 Ga 5 O 12 :35%Cr 3+ , 0.1%Ni 2+ phosphor is fabricated, delivering a maximum SWIR output power of ∼2.38 mW at 140 mA input current. Besides, the fabricated Yb 3 Ga 5 O 12 :Cr 3+ , Ni 2+ crystal fiber shows broadband SWIR luminescence upon 450 or 980 nm laser excitation, highlighting its potential for multi-response fiber amplifiers in optical communication. This work provides a promising material platform for high-performance SWIR emitters and photonic devices.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 8
·e71162
·
IF 4.2
Taiyu Duan,Su Yin,Xinyu Liu,Yuhang Deng,Yao Ji,Qinyuan Zhang
The rational design of multicomponent laser glasses in high-dimensional compositional spaces remains a significant challenge due to the limitations of traditional trial-and-error methods. This study proposes and validates a systematic predictive framework which integrates thermodynamic glass-forming region (GFR) calculation and a phase diagram approach for the Zn(PO 3 ) 2 –Ba(PO 3 ) 2 –Al(PO 3 ) 3 –BaF 2 quaternary system. Thermodynamic modeling effectively delineated the quaternary GFR with a high experimental overlap ratio of 83.7%, demonstrating its capability to navigate complex compositional boundaries. Furthermore, macroscopic physical properties including density, glass transition temperature and crystallization resistance, and local structural-dependent spectroscopic characteristics were accurately predicted (average deviation below 6.49%) based on congruently melting compound motifs. Based on high-throughput screening of the spectroscopic figure of merit, an optimized composition (20Zn(PO 3 ) 2 –34Ba(PO 3 ) 2 –30Al(PO 3 ) 3 –16BaF 2 ) was selected for fiber fabrication. The resulting Yb 3+ -doped fiber exhibited a competitive net gain of 5.47 dB/cm at 1064 nm. Under 976 nm pumping, efficient laser oscillation was achieved with a high signal-to-noise ratio of 50 dB and a low threshold of 11.8 mW. These results confirm that the phase-diagram-based methodology significantly accelerates the material development cycle, offering a robust framework for designing high-performance gain media for narrow-linewidth and ultrafast laser applications.
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Advanced Optical Materials
·
2019
·Vol. 7
·期 15
·1900213
·
IF 7.125
Youtao Ren,Zhengwen Yang,Mingjun Li,Jiufeng Ruan,Jingyuan Zhao,Jianbei Qiu,Zhiguo Song,Dacheng Zhou
Reversible upconversion luminescence modification based on photochromism has received considerable interest due to its potential applications in optical storage and high-sensitivity optical switches. However, stimulation-induced bleaching by an external thermal field is generally used for photochromism-induced reversible upconversion luminescence modification, which limits its practical application. In this work, a gray BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic is prepared, exhibiting the photochromism from gray to pink color when stimulated by 254 nm light. Interestingly, the pink BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic can be bleached by either a 473 nm laser or thermal stimulation. The reversible change between gray and pink color exhibits excellent reproducibility over several cycles by alternating between 254 and 473 nm (or thermal) light stimulation. The influence of the reversible photochromism of the BaMgSiO 4 :Yb 3+ ,Tb 3+ ceramic on its upconversion luminescence is investigated. Reversible modification of the upconversion luminescence is demonstrated by alternating between 254 and 473 nm (or thermal) light stimulation. For reversible modulation of the upconversion luminescence, excellent reproducibility is realized after several cycles. As an example, the application of the BaMgSiO 4 :Yb 3+ ,Tb 3+ photochromic ceramic as an anti-counterfeiting agent is described.
研究领域:
材料科学
·
光学
·
光子学
·
防伪技术
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 8
·4275-4285
·
IF 3.502
Mengting Guo,Chongyun Shao,Yang Zhang,Jingbo Yu,Yan Jiao,Malgorzata Guzik,Georges Boulon,Jinjun Ren,Lili Hu
The homogeneous Yb 3+ /Al 3+ /B 3+ -co-doped silica glasses were prepared via a sol-gel method. The impact of B 2 O 3 addition on the physical and optical properties and network structure was systematically studied. The network structure was investigated by the Fourier Transform Infrared (FT-IR), Raman spectra, and Solid State Nuclear Magnetic Resonance (SSNMR). Herein, B 2 O 3 addition can continuously decrease the refractive index and density. When B 2 O 3 is lower than 2 mol%, B 2 O 3 addition can obviously decrease the scalar crystal field parameters, Yb 3+ asymmetry degree, Yb 3+ cross-sections, due to the generation of Yb–O–B bonds at the cost of partial Yb–O–Al/Si ones. When B 2 O 3 is more than 2 mol%, FT-IR, Raman spectra, and SSNMR results indicate that further increased B atoms prefer to connect with Si and Al rather than Yb. Consequently, the above parameters are basically unchanged. Based on the results, an intuitive model of structure and properties evolution during the substitution of SiO 2 by B 2 O 3 has been established.
研究领域:
材料科学
·
光学材料
·
玻璃科学
·
光谱学
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高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2023
·Vol. 54
·期 6
·651-661
·
IF 2.5
Pengfei Shuai,Qingfeng Guo,Libing Liao,Zhaoliang Yan,Ke Su,Yujia Wang,Lefu Mei
In this work, a method for controllable regulation of crystal form was proposed for the first time and the effects of different crystal forms on the up-conversion luminescence properties of Ho 3+ , Yb 3+ co-doped K 3 Sc 0.5 Lu 0.5 F 6 (KSLF) phosphors was explored. KSLF:Ho 3+ , Yb 3+ phosphors were synthesized by the high temperature solid-state reaction method, and X-ray diffraction (XRD) results illustrate that the compounds can obtain monoclinic phase and cubic phase at different synthesis temperatures. In addition, according to the power-dependent up-conversion luminescence (UCL) intensity, the UCL mechanism and the electronic transition process are discussed. Simultaneously, the temperature sensing behavior of the best samples with different crystal forms at different temperatures was studied by fluorescence intensity ratio technique. All the results show that KSLF:Ho 3+ , Yb 3+ phosphors show great application potential in the field of temperature sensing, and the preparation of KSLF:Ho 3+ , Yb 3+ in different crystal forms can provide a reference value for crystal design and growth.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Pengsen Zhao,Haizhong Zheng,Guifa Li,Yongxiang Geng,Yixin Xiao,Hongbo Guo,Ping Peng
The CaO–MgO–Al 2 O 3 –SiO 2 (CMAS) corrosion resistance of La 3+ -Yb 3+ -Ce 4+ co-doped ZrO 2 (LYZC) ceramic was systematically discussed via experiment and first-principles calculation. Results demonstrate that at the CMAS/RE-ZrO 2 interface, RE is dissolved in molten CMAS to form some RE-apatite particles, which effectively inhibits CMAS penetration. Compared with La 3+ doped ZrO 2 (LZ), LYZC owns a better ability to maintain the coating microstructure under CMAS corroded, which is conducive to alleviating CMAS penetration. This conclusion is also confirmed by the low diffusion coefficients ( D ) of RE and Zr in CMAS/LYZC(111), which are only 2.305–5.556 × 10 −8 m/s and 2.694–3.421 × 10 −8 m/s, respectively. Furthermore, the small electrostatic potential difference (Δ V = 1.578–1.654 eV) of the CMAS/LYZC(111) terminal layer suggests that molten CMAS does not easily adhere to the LYZC surface.
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