HIGH TEMPERATURE MATERIALS AND PROCESSES
·
2021
·Vol. 40
·期 1
·389-396
·
IF 0.826
Yingwei Xu,Tingting Zhang,Li Zheng,Ailing Zou
KBaPO 4 :Eu 2+ /Sm 3+ phosphor was synthesized via the high-temperature solid-phase reaction method. The structural properties, surface morphology, and optical properties of the synthesized samples were obtained by the X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and fluorescence measurements. The XRD patterns indicate that the crystal structure of KBaPO 4 has not been changed by co-doped with two rare-earth ions. Under the excitation of 400 nm, the Eu 2+ and Sm 3+ co-doped KBaPO 4 phosphors showed typical emission peaks at 430 (blue), 562 (yellow), and 600 nm (red). Meanwhile, with the increase of the Sm 3+ content, the photoluminescent (PL) emission intensity of Sm 3+ increased until the content reaches 0.12. However, the PL intensity of Eu 2+ ions gradually decreased, which indicated that there was a possible energy transfer between the two ions. Therefore, the obtained results indicated that Eu 2+ /Sm 3+ co-doped KBaPO 4 is a promising phosphor for the use in white light-emitting diodes with near ultraviolet chips.
研究领域:
材料科学
·
光电技术
·
固体物理
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产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2021
·
IF 2.436
Yang Yu,Sai Xu,Muhan Jiang,Ruixin Song,Jie Li,Yuefeng Gao,Xizhen Zhang,Xiangping Li,Hongquan Yu,Baojiu Chen
Upconversion core-shell nanoparticles with dual-function of temperature sensing and photothermal conversion are preferable in diagnose and treatment of cancer. Herein, NaYF 4 :Tm 3+ /Yb 3+ @NaYF 4 :Sm 3+ /Yb 3+ upconversion nanoparticles have been synthesized by a high-temperature thermal decomposition method. XRD and TEM are used to characterize the crystal structure and morphology of the samples. Temperature dependent upconversion spectra are measured under excitation of 980 nm within the scope of 303–498 K. The investigation on temperature sensing properties are on the basis of the luminescence intensity ratio of Tm 3+ . The designed core shell nanoparticles and bare core nanoparticles both have good temperature sensing performances, and the sensing properties of both are similar. Furthermore, the photothermal conversion performances are investigated ground on the power dependent temperature measurement, ethanol evaporation experiment and visual infrared thermal images. It is found that the photothermal conversion ability of the core-shell UCNPs is greatly improved by coating of the NaYF 4 : Sm 3+ /Yb 3+ outer shell.
研究领域:
纳米技术
·
生物医学工程
·
材料科学
·
癌症研究
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Nan Zhou,Peixing Gao,Yimei Yang,Yuan Zhong,Mao Xia,Ye Zhang,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, a series of novel orange-red emission phosphors Sr 8 ZnY(PO 4 ) 7 :Sm 3+ (SZYP:Sm 3+ ) were synthesized by high-temperature solid-state reaction. The photoluminescence and concentration-dependent properties of this phosphor were investigated carefully through diffuse reflection spectra, excitation and emission spectra, Commission Internationale de l'Éclairage (CIE) chromaticity coordinate and decay times. SZYP:Sm 3+ could be efficiently excited by n-UV and blue lights which center at 318, 345, 363, 376, 401, 410, 440 and 475 nm, respectively. The characteristic orange-red emission peaking at 563, 601 and 647 nm had been detected, which should be attributed to the characteristic f – f forbidden transition of Sm 3+ . The internal quantum efficiency (IQE) of ideal phosphor of SZYP:0.09Sm 3+ reached as high as 47%. In addition, The concentration quenching mechanism and thermal stability of SZYP:Sm 3+ were further investigated. It was found SZYP:Sm 3+ can maintain 93% of initial emission intensity at 150 °C and the corresponding activation energy was calculated to be 0.26 eV based on Arrhenius formula. The emission intensity of 1.0Mg 2+ and 0.02Al 3+ incorporated SZYP:0.09Sm 3+ reached up to 134% and 117% of the initial value, respectively. Moreover, (light-emitting diodes) LED devices were fabricated by employing the optimized samples as orange-red component with 365 nm n-UV chips. The desired emission in plant absorption region and extremely high thermal stability imply that SZYP:Sm 3+ is suitable for the application in plant growth LED lighting.
研究领域:
材料科学
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光学工程
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固体化学
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光电子学
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农业照明技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Peifeng Wang,Yao Niu,Kai Zhang,Wenqiang Hou,Xianghua Yao,Youlong Xu
Solid-state sodium batteries represent a highly promising option for future electrochemical energy storage applications. The ionic conductivity of solid-state electrolytes is one of the significant factors limiting the development of solid-state batteries. In this study, we establish that Sm3+ doping effectively boosts the ionic conductivity of Na3Zr2Si2PO12 (NZSP). The optimal composition, Na3.2Zr1.8Sm0.2Si2–PO12 (NZSP-S20), exhibits a total conductivity of 1.87 mS cm–1 at 23 °C. Structural and microscopic morphology analyses reveal that Sm3+ doping enhances the ionic conductivity of NZSP through structural modulation, phase fraction adjustment, and grain size reduction. High-frequency impedance spectroscopy (40 Hz to 110 MHz) demonstrates that bulk and grain boundaries contribute 49.4 and 50.6%, respectively, to the total conductivity. The structural and microscopic morphology analyses reveal that Sm3+ doping enhances the ionic conductivity of NZSP. Furthermore, the critical current density (CCD) attained in the symmetric cell, assembled by using NZSP-S20 as the solid-state electrolyte and NaSn alloy as the electrode, reaches 2.2 mA cm–1. These results furnish a theoretical foundation for comprehending the modification of solid-state electrolytes.
研究领域:
材料科学
·
电化学
·
能量存储
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Tongxuan Mi,Yuhong Zhang,Luo Su,Jingyi Zhang,Jingliang Zhang,AoTian Zhang,Hang Liu
In this paper, a series of Sm 3+ single-doped and Sm 3+ /Er 3+ co-doped lead-free double perovskite cesium sodium bismuthate hexachloride(Cs 2 NaBiCl 6 ) fluorescent materials are successfully synthesized by solvothermal method, and their multimode luminescence properties and temperature sensing properties are systematically studied. The yellow, orange and green tunable luminescence of Cs 2 NaBiCl 6 :Sm 3+ /Er 3+ phosphor are achieved by adjusting the excitation wavelength(380, 410, 980 nm). The material exhibits multi-color luminescence characteristics under different excitation. Moreover, the anti-counterfeit design exhibits robust security and resistance to duplication. Based on the luminescence intensity ratio(LIR) technology, the relative sensitivity(S R ) of Cs 2 NaBiCl 6 :15 %Sm 3+ /20 %Er 3+ reaches 3.06 %K −1 (313 K) under 410 nm excitation. The study provides a new idea for the development of multi-functional lead-free perovskite materials in the field of optical anti-counterfeiting and precision temperature measurement.
研究领域:
材料科学
·
光学安全
·
温度传感
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固体物理
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haoran Su,Xinyi Li,Dongze Li,Di Gao,Mengxue Zhang,Yufan Shang,Yanping Liu,Huiling Geng,Xiang Liu,Ruijin Yu
Thermal stability holds particular significance for phosphors intended for LEDs . Abnormal thermal quenching was successfully reached by strategic point defect engineering by inserting Frenkel defects and nonequivalent substitution defects in novel Sm 3+ ions doped Na-rich distorted double perovskite Na 1.5 La 1.5 TeO 6 phosphors. Its integral intensity at 420 K (115.03 %) was far higher than that of room temperature . Besides, the phosphors exhibited a pronounced orange-red emission peak at 644 nm when excited at 404 nm, which was ascribed to the 4 G 5/2 - 6 H 9/2 transition of Sm 3+ ions. The concentration quenching phenomenon resulting from dipole-dipole interactions was observed in the phosphors, and the optimal concentration of dopant Sm 3+ was determined to be 1 mol%. After calculation, it was surprising that the color purity values of all phosphors were not less than 99.9 %. Additionally, the internal quantum efficiency (IQE) reached 65.30 %, and the activation energy ( E a ) of Na 1.5 La 1.5 TeO 6 :1 mol%Sm 3+ was 0.570 eV. Meanwhile, the emission spectrum of the produced orange-red light emitting diodes (LEDs) exhibited a close correspondence with the absorption curves of various plant pigments (chlorophyll b , allophycocyanin, phycocyanin, phytochrome red and far red (P R and P FR )). The prepared white light emitting diodes (WLEDs) possessed low correlated color temperature (CCT) of 4769 K and as high general color rendering index (CRI, R a ) value as 91. In summary, the phosphors presented promising options for plant-cultivating LEDs and high CRI WLEDs based on their superior optical and thermal properties .
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xingyang Peng,Rongmao Li,Hao Guo,Weihai Chen,Kang Wang,Can Yuan,Xiang Guo,Chaoyong Deng,Ruirui Cui
Existing phosphor materials can hardly meet the demands of multi-scenario applications. The importance of developing novel Sm 3+ doped phosphors with both excellent thermal stability and multifunctional properties is thus emphasised. This paper presents a systematic study of the multifunctional red phosphor Ba 6 La 2 Ga 4 O 15 :Sm 3+ . Under 406 nm excitation, the material exhibits a characteristic red-light emission of 601 nm. Thermal stability tests showed that its luminescence intensity at 423 K maintained 81.84 % of room temperature. The thermometry performance based on the FIR method showed a maximum relative sensitivity of 1.89 %/K and an absolute sensitivity of 0.63 %/K in the range of 298 – 473 K. Application studies show that the encapsulated WLED device has a color temperature of 4878 K and a color rendering index of 91.4, making it suitable for high-rendering white light illumination; In addition, the phosphor enables high-contrast imaging of fingerprint features at levels 1 – 3, which significantly improves latent fingerprint recognition rates. In conclusion, BLGO:Sm 3+ phosphors have shown significant application value in the fields of non-contact optical temperature measurement, high-quality solid-state lighting and fingerprint monitoring.
研究领域:
材料科学
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光学工程
·
固态照明
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法庭科学
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传感器与仪器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Jinlei Li,Chengcheng Wang,Junpeng Shi,Penghui Li,Zhenfeng Yu,Hongwu Zhang
Here, a kind of porous nanoparticles GdAlO 3 :Cr 3+ , Sm 3+ (GAO:Cr,Sm) which own magnetic resonance and long persistent luminescent properties have been synthesized. The spherical morphology and narrow size distribution would allow the GAO:Cr,Sm nanoparticles to be utilised as a drug carrier and the drug release results indicate that the GAO:Cr,Sm drug carriers have an excellent drug sustained properties. Applying the Cr 3+ and Sm 3+ coped with gadolinium aluminate as the NIR persistent luminescence center and the energy transfer resonance from Gd 3+ to Cr 3+ , these nanoparticles exhibit excellent NIR persistent luminescence at 732 nm under the UV irradiation of 254 nm and it can persist for about half an hour. In addition, they possess a longitudinal relaxivity (r 1 ) value of 4.75 mM −1 s −1 , which means that these nanoparticles could be applied for MR imaging as contrast agents. Carboxymethyl Chitosan was modified on the surface of GAO:Cr,Sm nanoparticles to make them owning excellent biocompatibility and low toxicity and these nanoparticles were successful to realize in vivo imaging. Hence, the well-defined nanoprobes of GAO:Cr,Sm exhibit great potential in biomedicine as trackable drug carriers and in vivo imaging agent due to the dual-model imaging property.
研究领域:
材料科学
·
生物医学工程
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纳米技术
·
成像科学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 9
·1012
·
IF 2.8
Shijian Sun,Mengquan Liu,Zheng Li,Junqiang Cheng,Dechuan Li
Hollow dendritic Na4La2(CO3)5crystals doped with Sm3+ions were synthesized with sodium carbonate using a hydrothermal method. The unique lifetime of Sm3+enables the optical measurement of luminescent ion content. The X-ray diffraction spectrum indicates that the nanocrystals maintain structural stability with a hexagonal arrangement, even when the concentration of Sm3+reaches 50 at.%. As the concentration of Sm3+increases, the emission intensity of Na4(La1−xSmx)2(CO3)5first rises and then falls. The maximum emission intensity of the fluorescent powder occurs at a Sm3+concentration of 0.04. Beyond this concentration, concentration quenching takes place, primarily due to electric dipole–dipole interactions. Using an excitation wavelength of 404 nm and monitoring at 596 nm, the fluorescence lifetime of Na4(La1−xSmx)2(CO3)5shows a strong dependence on Sm3+concentration, which can be described by a precise equation. Over the range of Sm3+concentrations from 0.005 to 1, the lifetime decreases from 3.126 ms to 0.023 ms. Therefore, optical monitoring of fluorescent powders is crucial for confirming the composition of coatings used in applications such as solid-state lighting and anti-counterfeiting, by utilizing the relationship between lifetime and doping concentration.
研究领域:
材料科学
·
光学材料
·
发光光谱学
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jiajun Feng,Yongxin Yu,Hongji Song,Zibo Chen,Yingxiang Zhu,Jiahui Liu,Jingtian Xie,Lianfen Chen,Junhao Li
A structural design strategy was employed to develop NaGd2Ga2InGe2O12:Sm3+ (NGGIG:Sm3+) garnet phosphors, optimizing the local coordination environment to enhance luminescence performance. By tailoring site occupation, Sm3+ ions were incorporated into an asymmetric crystal field, where a statistical probability model confirmed that ∼97% of Sm3+ ions reside in distorted coordination environments, promoting electric dipole(ED) transitions. The phosphors exhibit a high red-to-orange (R/O) intensity ratio of 2.97, contributing to enhanced red emission. CIE chromaticity coordinates of (0.61, 0.39) indicate a significant shift toward the red region, and the phosphors retain over 70% of their luminescence intensity at 400 K, demonstrating good thermal stability. These characteristics make NGGIG:Sm3+ a promising candidate for high-performance red phosphors in solid-state lighting applications, highlighting the effectiveness of site engineering in garnet structures for optimizing luminescence efficiency and stability.
研究领域:
材料科学
·
光学材料
·
固态照明
·
无机化学
·
发光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Zhiyu Qin,Langping Dong,Ganghua Zhang,Yufeng Liu,Guoying Zhao,Yongzheng Fang,Jingshan Hou
In this paper, a novel violet excited reddish-orange emitting Sr 3 Ga 2 Sn 1 · 5 Si 2 · 5 O 14 :Sm 3+ (SGSSO:Sm 3+ ) phosphor with high thermal stability was designed and synthesized by the high temperature solid state reaction method for the first time. The photoluminescence (PL) properties of the SGSSO:Sm 3+ phosphors were investigated systematically. Under 402 nm violet light excitation , SGSSO:Sm 3+ phosphor shows reddish-orange emission at 598 nm that is attributed to the 4 G 5/2 → 6 H 7/2 transition of the Sm 3+ ions. Importantly, the PL intensity of SGSSO:Sm 3+ at 423 K can maintain 87% of the initial value at room temperature . The high thermal stability of Sm 3+ in SGSSO was speculated to be attributed to the energy transfer mechanism of trap formed by the hetero-valent substitution of Sm 3+ at Sr 2+ sites. Finally, a WLED has been fabricated by combing the violet LED chip with the as-prepared reddish-orange emitting phosphor , commercial blue BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ) and green (Ba,Sr) 2 SiO 4 :Eu 2+ ((Ba,Sr)S:Eu 2+ ) phosphors. The results indicated that the as-prepared SGSSO:Sm 3+ phosphor can be a potential candidate of the reddish-orange component for violet chip pumped white-light-emitting-diodes.
研究领域:
材料科学
·
光电子学
·
固态照明
·
无机化学
·
应用物理学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-9
·
IF 4.011
Liu Ning,Mei Lefu,Liao Libing,Fu Jie,Yang Dan
What ideal w-LED phosphors always aim to do is to achieve a single phase near-sunlight emission phosphor simultaneously with both high luminescence efficiency and high thermal stability at operation temperature. And It is well known that apatite compound phosphors are one of the most promising optical materials to realize those above because of their unique structure enhanced luminescence properties and thermal stability. Here, we synthesized a co-doped single phase apatite phosphors Ca 2 La 8 (SiO 4 ) 6 O 2 :Dy 3+ /Sm 3+ (CLSO:Dy 3+ /Sm 3+ ) for white light emission, which was provided with excellent thermal stability and of which luminescence intensity at 150 °C still was 92 percentage of that at room temperature. Moreover, X-ray diffraction technique, Fourier transform infrared spectroscopy, scanning electron microscope were employed to characterization of phase structure and morphology, and consequently pure apatite structure and gravel-like morphology of phosphors were proved. Analysis of photoluminescence spectra indicated that concentration quenching effect exist in single-doped CLSO:Dy 3+ phosphors owing to dipole-dipole interaction between Dy 3+ ions. It is revealed that maybe exist Dy 3+ ↔ Sm 3+ bilateral non-radiative energy transfer processes in Dy 3+ /Sm 3+ co-doped CLSO system by PL spectra and decay curves. And variation of Sm 3+ ion concentration can control color emission, namely CIE chromaticity coordinates and correlated color temperature, finally to achieve white light emission (0.309,0.309) with CCT 6848 K, able to be a potential candidate for commercial lighting applications.
研究领域:
材料科学
·
光电
·
固体物理
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）