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
✓ 已验证
DOI
高影响因子
NANO
·
2024
·
IF 1
Zhenqian Zhang,Yixing Li,Xinyue Yu,Bijun Fang
The rare-earth ion doping in nanocrystals has the advantage on improving the interested properties. As one of rare-earths, the trivalent samarium ion (Sm 3 + ) was used as a dopant. The precursor of Sm 3 + -doped cadmium ferrite (CdFe 2 O 4 ) nanocrystals was reacted in water-soluble polymeric nanoreactors as a dispersed phase in miniemulsion, and then calcinated to form doped nanocrystals. The 1% Sm 3 + -doped nanocrystal in small size exhibited the smaller narrow gap energy and weak photoluminescent emission intensity; which attributed to the positive influences on the photocatalytic degradation. The selected Sm 3 + -doped spinel ferrite nanocrystals provide a unique catalyzer for organic compound photodegradation.
研究领域:
材料科学
·
纳米技术
·
无机化学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 108
·89290-89298
·
IF 3.84
Lili Wang,Byung Kee Moon,Sung Heum Park,Jung Hwan Kim,Jinsheng Shi,Kwang Ho Kim,Jung Hyun Jeong
A novel Sm3+-doped Sr2CaWO6 (SCWO) red phosphor, synthesized though a solid-state reaction, was reported. Its crystal structure was analyzed and refined via the Rietveld full-pattern fitting method based on XRD patterns. The CASTEP module of Materials Studio was used to investigate the band structure and density of states of the SCWO. The optical band gap was calculated through the UV-vis diffuse reflectance spectrum and compared with the value predicted by the DFT method. Raman spectra were recorded to confirm the substitution of cations by Sm3+ ions. The broad W–O charge transfer band and narrow excitation band at 406 nm from Sm3+ ions have comparable intensities in SCWO:Sm3+. After the introduction of charge compensators Li+, Na+ or K+, the intensity of the near-UV excitation band at 406 nm was almost twice as much as before. The profiles of the emission spectra under excitation into the charge transfer absorption and f–f transition of Sm3+ are different, and low-symmetry Sm3+ centres are preferentially excited via f–f absorption transitions. The intensity ratios of electronic, magnetic dipole-allowed transitions under different radiations show that the charge compensators can influence the chemical environment around Sm3+.
研究领域:
材料科学
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固体化学
·
发光材料
·
晶体学
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电子结构理论
·
无机功能材料
✓ 已验证
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
·
2023
·
IF 6.2
Weijia Guo,Peiyao Zhao,Zhenxing Yue
Passive electronic components made from dielectric ceramics can hardly operate at extremely high temperatures, which is attributed to the sharply increasing dielectric loss and leakage conductance. In this work, the widely applicated CaTiO 3 ceramics are used as the matrix, and the high-temperature electrical properties are modified by doping Sm 3+ and Al 3+ . The Sm-doping in CaTiO 3 ceramics can significantly suppress the dielectric relaxation at low frequencies and reduce the high-temperature leakage conductance. Continued doping of Al in Ca 0.6 Sm 0.27 TiO 3 ceramics can further reduce the high-temperature dielectric loss and conductivity. These changes are associated with tighter crystal structures and fewer defects in the ceramics. With Sm and Al doping, the high-temperature dc conductivity of the ceramics is reduced by about 4 orders of magnitude, and a dielectric loss of less than 0.02 and a low temperature cofficient of capacitance (TCC) of − 25 ppm/℃ are obtained over a wide temperature range of room temperature to 530 ℃. Outstanding temperature stabilities are exhibited over a temperature range of 25 ∼ 200 ℃ in energy storage performance and charge-discharge property. Extremely fast discharge speed ( t 0.9 = 16 ns) makes it suitable for pulsed power electronic systems. Such linear dielectric materials are expected to be used in harsh environment of high temperatures.
研究领域:
材料科学
·
电气工程
·
陶瓷
✓ 已验证
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
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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
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
·
光学工程
·
固态照明
·
法庭科学
·
传感器与仪器
✓ 已验证
产品关联
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
·
固体物理
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Kun Zhu,Haitao Lv,Yanmin Wang,Zhidong Pan
Sm 3+ doped calcium stannate (CaSnO 3 :Sm 3+ ) and (Sm 3+ , Zr 4+ )-co-doped calcium stannate (CaSnO 3 :Sm 3+ , Zr 4+ ) photoluminescent phosphors were synthesized via co-precipitation and subsequent sintering in oxidizing atmosphere at 1400 °C for 60 min with SnCl 4 ·5H 2 O, CaCl 2 ·2H 2 O, ZrO(NO 3 ) 2 · x H 2 O and Sm 2 O 3 as main raw materials. The synthesized samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, photoluminescent spectroscopy, luminescent decay curves, afterglow spectroscopy and thermo-luminescent glow curves. The results show that CaSnO 3 pure phase is synthesized in co-precipitation reaction at an optimum molar ratio of CaCl 2 ·2H 2 O:SnCl 4 ·5H 2 O of 1.4:1.0 and subsequent sintering at 1400 °C for 60 min. Calcium stannate as a host matrix can be doped with Sm 3+ ions or co-doped with Sm 3+ /Zr 4+ ions for the formation of white photoluminescent phosphors. CaSnO 3 :0.03Sm 3+ phosphor has an optimum photoluminescent intensity. Also, the fluorescent emission intensity of CaSnO 3 :0.03Sm 3+ ，0.04Zr 4+ phosphor under excitation of 365 nm wavelength can be enhanced due to Zr 4+ ions doping at an optimum doping amount y of 0.04. The CIE 1931 chromaticity coordinates change from (0.3600, 0.3535) for CaSnO 3 :0.03Sm 3+ phosphor to (0.3622, 0.3574) for CaSnO 3 :0.03Sm 3+ , 0.04Zr 4+ phosphor as the average crystalline size decreases from 71.5 to 68.3 nm and the unit cell volume increases from 0.2686 to 0.2775 nm 3 . In addition, the electron transition mechanism for the photoluminescent and long afterglow properties was also discussed.
研究领域:
材料科学
·
光学
·
化学
✓ 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）