CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Na-Na Zhang,Yu-Guo Yang,Xue-Yuan Yan,Meng-Qi Wang,Yuan-Yuan Zhang,Hua-Di Zhang,Rui Zhang,Cheng-Cheng Qiu,Fu-Di Chen,Ji-Yang Wang
In the present work, orange-red Sm 3+ doped La 3 Ga 5 SiO 14 phosphors were successfully formed through high temperature solid state method at 1350 °C. The phase purity, size distribution, vibrations, absorption and series of luminescence characteristics were studied, respectively. The X-ray diffraction and Rietveld refinements results show the single phase and crystal lattice information. The results of scanning electron microscope and energy-dispersive spectroscopy demonstrate the basic particle shape and verify the constituent elements for the prepared samples. The infrared spectra clarify the phonon vibration properties of the La 3 Ga 5 SiO 14 :Sm 3+ phosphors. The UV–visible absorption spectra indicate that the absorption properties and the corresponding band gaps. The luminescence results show that the La 3 Ga 5 SiO 14 :Sm 3+ phosphors emit intense orange-red emission peaking at 600 nm as excited at 401 nm. The optimum doping concentration of Sm 3+ ion is x = 0.05 and the mechanism of concentration quenching is from dipole-quadrupole interaction. In addition, the prepared phosphors have good thermostability, and its thermal activation energy is 0.2161 ev. Finally, red and white light emitting diodes were successfully manufactured with 395 nm chip. All experimental results show that the La 3 Ga 5 SiO 14 :Sm 3+ phosphors have good application prospect in light emitting diodes .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Renping Cao,Minhong Wu,Bang Lan,Tengyu Huang,Jingheng Nie,Fangrui Cheng,Xiaohu Luo,Jing Wang
New single phase and adjustable emission phosphors have attracted a lot of attention because of the good luminous properties. In this work, Sm 3+ doped CaTbAl 3 O 7 phosphors are prepared in air by solid-state method. The crystal structure, concentration dependent spectra, lifetimes, and luminescence properties are investigated. Because of the 4 f 8 → 4 f 7 5 d 1 and 4 f → 4 f transitions of Tb 3+ ion, host (CaTbAl 3 O 7 ) shows an excitation spectrum in the range of 220–520 nm under monitored at 544 nm and emits yellow-green light under excitation 248, 284, and 368 nm due to the 5 D 4 → 7 F J ( J = 0, 1, 2, 3, 4, 5, and 6) transitions of Tb 3+ ion. CaTbAl 3 O 7 :Sm 3+ under monitored 598 nm contains the excitation spectral peaks of both CaTbAl 3 O 7 and Sm 3+ ion. With excitation at 368 nm, CaTbAl 3 O 7 :Sm 3+ glows orange-red light, its PL spectrum has both host (CaTbAl 3 O 7 ) and Sm 3+ ion contributing, and the chromaticity coordinates are about (0.5499, 0.4351). Under excitation 402 nm, the red-orange emission of CaTbAl 3 O 7 :Sm 3+ is only the contribution of Sm 3+ ion and the chromaticity coordinates are about (0.5823, 0.4168). The energy transfer process from Tb 3+ in host (CaTbAl 3 O 7 ) to Sm 3+ ions can be confirmed via the spectral properties. We explain the luminous mechanism of CaTbAl 3 O 7 :Sm 3+ by the energy level diagrams of Tb 3+ and Sm 3+ .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Renping Cao,Yuan Ren,Ting Chen,Wenhao Wang,Qingdong Guo,Qianglin Hu,Chenxing Liao,Ting Fan
A series of SrZrSi 2 O 7 :R (R = Sm 3+ , Bi 3+ , Bi 3+ /Sm 3+ ) phosphors are synthesized successfully in air via high temperature solid-state reaction method. The crystal structure, lifetime, energy transfer (ET) process, and luminescence properties of samples are investigated in detail. Host SrZrSi 2 O 7 with excitation at 300 nm ultraviolet (UV) light emits blue light due to the Zr 4+ - O 2− transition inside [ZrO 6 ] group. SrZrSi 2 O 7 :Bi 3+ phosphor with excitation at 315 nm UV light emits blue light owing to the 3 P 0,1 → 1 S 0 transitions of Bi 3+ ion. SrZrSi 2 O 7 :Sm 3+ and SrZrSi 2 O 7 :Sm 3+ , Bi 3+ phosphors with excitation at 300 nm UV light show a tunable emission due to ET process from [ZrO 6 ] to Sm 3+ and from Bi 3+ to Sm 3+ , respectively, and they only emit red-orange light under excitation 407 nm because of the 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 transitions of Sm 3+ ion. The optimal concentrations of Sm 3+ and Bi 3+ ions are ~6 and 4 mol%, respectively. The lifetime of SrZrSi 2 O 7 :Sm 3+ phosphor decreases from 1.127 ms to 0.897 ms with increasing Sm 3+ concentration in the range of 2–12 mol%, and that of SrZrSi 2 O 7 :6%Sm 3+ , Bi 3+ phosphor decreases from 1.005 ms to 0.948 ms with increasing Bi 3+ concentration in the range of 1–8 mol%. The luminous mechanisms of samples are explained by the energy level diagram. The experimental results are helpful for the luminescence improvement and emission adjustion of other Sm 3+ -doped phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Biao Zhou,Xiangtong Zhang,Ranran Hu,Ruixue Hou,William W. Yu
Metal halide perovskites exhibit promising prospect in light-emitting diodes, solar cells, photodetectors and bioimaging. However, the workhorse of metal halide perovskites relies on toxicity lead element, which severely damages human body and environment. Among lead-free perovskites, Cs 2 NaInCl 6 double perovskite is one of the most promising candidates because of its great stability and easy synthesis, but suffers inadequate optical performance. Here, we doped Sb 3+ and Sm 3+ into Cs 2 NaInCl 6 nanocrystals by a hot injection method. Cs 2 NaInCl 6 :Sb 3+ exhibits blue emission at 447 nm. Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ nanocrystals simultaneously generate the blue emission of Sb 3+ and the multiple emissions of Sm 3+ at 565, 602, 650 and 710 nm. With the increase of Sm 3+ feed ratio, the emission color of Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ gradually moves to cold white region at (0.27, 0.28) in CIE chromaticity diagram and correlated color temperature of 11,840 K. This work shows the potential application of Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ nanocrystals as a single-component cold white emitter.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jianming Liu,Shengnan Liu,Ya Chen,Qiliang Zhao,Yajuan Zhao,Weidong Xiang,Xiaojuan Liang,Baodong Ren
Since being synthesized, CsPbX 3 (X = Cl, Br or I) quantum dots (QDs) have gained increased interest due to their superior performances in photovoltaic applications. Herein, Sm 3+ -doped CsPbBr 3 nanocrystallines (NCs) were successfully prepared in zinc borosilicate sodium (ZnO–B 2 O 3 –SiO 2 –Na 2 CO 3 , ZBSN) glass, and the as-prepared glass exhibited a strong red emission, which was attributed to the effects of the energy level transitions in Sm 3+ . Importantly, white light-emitting diodes (W-LEDs) were prepared by combining the glass with a blue InGaN chip, eliminating the need for a red phosphor to provide the red light, and white light was generated with a high colour rendering index (CRI: 82.6), a low correlated colour temperature (CCT: 4455 K) and colour coordinates in the white light region (0.3547, 0.3234). The glasses show excellent stability at 85 °C and 85% RH. Therefore, the Sm 3+ -doped CsPbBr 3 NCs glass can be used as a colour converter for application in lighting engineering.
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
Inorganics
·
2024
·Vol. 12
·期 12
·327
·
IF 3.1
Ronghua Jian,Tao Pang
This work reports the light-to-heat conversion (LHC) behavior of NaNdF4doped with Sm3+. Due to the cross-relaxation between Nd3+and Sm3+, the improved LHC is obtainable by introducing 5% Sm3+. When the laser power density is only 1.72 W/cm2, the spot temperature of NaNdF4:5%Sm3+powder reaches as high as 138.7 ± 4.04 °C. More importantly, the photoheating response to the pump laser has favorable linear characteristics within a specific power range. A simple physical model is applied to analyze the relationship between photothermal heating and pump power. Finally, the temperature-responsive luminescence anti-counterfeiting is designed by combining the LHC material with the NaYF4:Yb3+/Ho3+/Ce3+microcrystals. This novel strategy only requires two laser beams, and thus is more convenient to apply.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Xinyu He,Tao Wang,Xudong Li,Sujit Das,Xingjun Liu,Zuhuang Chen
Piezoelectric ceramics with combined high piezoelectric performance and excellent thermal stability are important and urgently needed for actuation and sensor applications in harsh environments, such as aerospace, automotive, oil, and gas exploration industries. However, the development of such piezoceramics is still a highly challenging task because an enhanced piezoelectric response is generally accompanied by a decrease in thermal stability. Here, we report that 0.55Bi1–xSmxFeO3–0.45PbTiO3 piezoceramics exhibit a balanced trade-off between piezoelectric response and thermal stability near the morphotropic phase boundary (MPB), where piezoelectric coefficient d33 (275 pC N–1) barely changes even at a temperature as high as 320 °C and the well-squared shape P–E hysteresis loop persists even at a high temperature of 220 °C. Compared with La3+, Sm3+ has a smaller ionic radius than Bi3+ or Pb2+ and thus could be more effectively to induce MPB at a relatively low substitution level (x = 0.16–0.21). In turn, the thermal stability of the piezoceramics does not degrade significantly. Our results further demonstrate that Sm substitution induces a strong relaxor behavior in the ceramics. These results suggest that the Sm3+-doped BiFeO3-PbTiO3 ceramics hold great promise for high temperature piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Rong Zhuang,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
A series of [(Ba (1-0.3y) Ca 0.3y ) 1-x Sm x ][Ti (0.8+0.2y) Hf (0.2-0.2y) ]O 3 (Sm 3+ -doped (1-y)Ba(Ti 0.8 Hf 0.2 )O 3 -y(Ba 0.7 Ca 0.3 )TiO 3 , abbreviated as Sm 3+ -doped BCTH, or (1-y)BHT-yBCT:xSm 3+ , x = 0.0005–0.03, y = 0.2–0.7, y representing the mole fraction of (Ba 0.7 Ca 0.3 )TiO 3 ) nano phosphors were prepared by a hydrothermal method . The Sm 3+ ions doping amount and triple-point morphotropic phase boundary (TMPB) composition dependent photoluminescence properties were systematically investigated. The hydrothermal synthesized powders present rather pure pseudo-cubic perovskite phase structure at room temperature and locate on the rhombohedral side of MPB. Under the excitation of 409 nm light, the powders exhibit dominant orange-red emission peaks with characteristic emission of the Sm 3+ ions at around 564 nm, 596 nm, 644 nm, and 703 nm, relating to the transitions of 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 and 6 H 11/2 , respectively. The BHT-0.5BCT:0.005Sm 3+ powder exhibits optimal emission in these Sm 3+ -doped BCTH powders. Furthermore, the phase transition temperature can be characterized by the multi-feature changes of the temperature dependent fluorescence intensity.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yiwei Wang,Yue Li,Yongbo Ma,Yachong Liu,Haolin Lu,Huanxin Yang,Wenda Sun,Xiangxiang Chen,Wei Xiong,Libing Zhang,Xiyan Li
Lead-free halide perovskites are highly appealing for optoelectronic applications due to their non-toxic nature and exceptional optical properties. In this study, we report the co-doping of Sb 3+ and Sm 3+ in the rare-earth-based double perovskite Cs 2 NaGdCl 6 . The incorporation of Sb 3+ ions effectively tunes the electronic structure, achieving a photoluminescence quantum yield (PLQY) of up to 87.9 %. The Sb 3+ /Sm 3+ -co-doped Cs 2 NaGdCl 6 exhibits excitation wavelength-dependent emission characteristics, transitioning from blue emission under 260 nm excitation to white emission under 365 nm excitation. Furthermore, the Sb 3+ /Sm 3+ -co-doped Cs 2 NaGdCl 6 material demonstrates advanced multifunctional applications in light-emitting diode (LED) lighting and fluorescence anti-counterfeiting technologies. These findings hold significant implications for the utilization of rare-earth-based double perovskites in optoelectronic devices.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Yuxia Li,Qi Luo,Xin Huang,Hao Lu,Yazhou Yuan,Xieming Xu,Shuaihua Wang,Shaofan Wu
In recent years, the development of new scintillation materials with red and near-infrared light emission has had significant advantages based on the development of an avalanche photodiode with high quantum yield. This study used a hydrothermal method to synthesize rare-earth-doped Cs2NaScCl6 crystals, in which a red emission of Cs2NaScCl6:Sm was investigated with high X-ray sensitivity and low detection limit. In addition, a tunable wavelength range of radioluminescence can be achieved, in which a near-white light emission can be generated by precisely controlling the proportion of Sm3+ and Tb3+ doping concentrations. Meanwhile, a Cs2NaScCl6:7%Sm scintillation film has been successfully prepared by direct coating with a thickness of 150 μm, which achieves a spatial resolution of 11.9 lp mm−1 based on X-ray imaging experiments. Therefore, this perovskite material has shown potential application as an eco-friendly multifunctional imaging material.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-12
·
IF 2.8
Xie Le-Tian,Zhou Xiao-Xiao,Tang Yu-Cheng,Yin Yang,Hao Yijin,Pei Jun,Zhang Bo-Ping
With the increasing demand for portable electronics, power electronics and other devices, energy storage materials with high power density and large energy storage density are becoming more and more important. BiFeO 3 -BaTiO 3 lead-free ferroelectric ceramics are deemed as a potential lead-free energy storage material due to their high spontaneous polarization and high Curie temperature. However, high remanent polarization has become a serious obstacle to its practical application. In this work, 0.67Bi (1- x ) Sm x FeO 3 -0.33BaTiO 3 (BS x F-BT, 0 ≤ x ≤ 0.10) was prepared by the conventional solid phase sintering method. The phase transforms from rhombohedral to pseudocubic, and the dielectric and electrical data reveal that relaxor ferroelectrics are favorable for achieving the small size polar nanoregions and enhanced relaxation behavior. Due to enhanced relaxation behavior by doping Sm 3+ , the recoverable energy storage density ( W rec ) reaches 1.99 J/cm 3 , and the energy storage efficiency ( η ) is 57% at a low electric field (190 kV/cm), which is higher than the undoped ceramic ( W rec = 0.272 J/cm 3 and η = 26%). This work also puts forward the concept of Ergodic relaxor ferroelectrics and Non-ergodic relaxor ferroelectrics to explain the improvement of energy storage performance.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Changyan Ji,Zhi Huang,Xiuying Tian,Hengping He,Jin Wen,Yangxi Peng
A series of red emitting phosphors Mg 3 Y 2-x Ge 3 O 12 :xSm 3+ (0≤x ≤ 0.06) were successfully synthesized. Samples Mg 3 Y 2-x Ge 3 O 12 :Sm 3+ exhibited a cubic structure pertaining to the I a-3d (230) space group and the particle sizes range from 1 μm to 5 μm. The optical properties displayed that the optimum doping concentration of Sm 3+ is 4%. The phosphor Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ not only exhibited a broad band gap of 5.54 eV but also showed a high color purity of 97.6%. In addition, the strongest emission intensity located at 566 nm belonged to the 4 G 5/2 → 6 H 5/2 transition when excited at 405 nm. Thermal quenching test revealed that the sample Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ are excellent powders with splendid thermal stability, in which only 3.6% of the PL intensity is quenched at 473 K in comparison with that of 298 K. As a result, the W-LEDs based on Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ yielded a high R a of 91.1, a low CCT of 4881 K, and CIE coordinates of (0.3476, 0.3466) in a 20 mA driven current. This research work provided important guidance for the synthesis of Sm 3+ doped red component with excellent luminesce properties and high thermal stability characteristics used in W-LEDs.
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
危险品化学品经营许可证（带存储）