CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 18
·32662-32669
·
IF 5.1
Li Li,Haoliang Yang,Yongjie Wang,Xianju Zhou,Faling Ling,Huajing Gao,Zhiyu Yang,Xiantong Tang,Yongbin Hua
The development of medical, military, and other fields has greatly increased the demand for broadband near-infrared light sources . This article reports that Sr 3 Sc 2 Ge 3 O 12 : Cr 3+ (SSGO: Cr 3+ ), a broadband near-infrared phosphor with 850 nm as the luminescence center, has an emission spectrum covering 700–1200 nm and a full width at half maximum (FWHM) of 125 nm under 490 nm excitation. To further increase the FWHM value, Yb 3+ is introduced into the phosphor of SSGO: Cr 3+ to enable energy transfer from Cr 3+ to Yb 3+ . After doping 1 % of Yb 3+ onto the Sr 2+ site, the near-infrared emission generated by the 4 A 2 → 4 T 1 (4P) transition of Cr 3+ and the near-infrared emission generated by the 2 F 5/2 → 2 F 7/2 transition of Yb 3+ work so that the FWHM increases to 220 nm. In addition, the thermal stability of the phosphor after co-doping with Yb 3+ is also greatly enhanced from 61.6 % to 75.1 % by comparing it to the Cr 3+ single-doped sample. In addition, SSGO:0.08Cr 3+ , 0.01 Yb 3+ was combined with a commercial 490 nm chip to prepare a broadband near-infrared light-emitting diode (pc-LED).
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
能量传递
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 89
·56229-56238
·
IF 3.108
Wei Wang,Yunxi Li,Shanshan Hu,Xuemei Zhang,Jianfeng Tang,Jun Yang
Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals with various morphologies have been synthesized via a one step hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), and up conversion photoluminescence (UCPL) spectra were used to characterize the samples. The influences of surfactants, pH values, and molar ratio of F−/Sc3+ on the crystal phase, size and shape of final products have been studied in detail. The aspect ratio of products increased gradually with the increase of F−/Sc3+ molar ratio. Additionally, the luminescence properties of Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals were systematically studied. The blue emission is attributed to the 1G4 → 3H6 transition of Tm3+; the green emission can be obtained due to the 2H11/2/4S3/2 → 4I15/2 transitions of Er3+ and the 5S2/5F4 → 5I8 transition of Ho3+; the red emission comes from the 4F9/2 → 4I15/2 transition of Er3+ and the 1G4 → 3F4 transition of Tm3+. Based on the generation of red, green, and blue emissions in the different Ln ion-doped Ba3Sc2F12, the white light emission can be obtained by appropriately doping Yb3+, Er3+, and Tm3+ in the present Ba3Sc2F12 crystals due to the color superposition principle. Here, the sample Ba3Sc1.5856F12:0.4Yb3+, 0.01Er3+, 0.0044Tm3+ crystals showed suitable intensity ratio of blue, green and red (RGB) emissions resulting in bright white light with CIE-x = 0.274 and CIE-y = 0.287, which was illustrated by a photograph under excitation of 980 nm. The prepared Ba3Sc2F12:Ln3+ phosphor has potential applications in the fields of three dimensional displays, back lighting and white light sources.
研究领域:
材料科学
·
光学材料
·
发光学
·
光子学
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2017
·Vol. 100
·期 7
·3061-3069
·
IF 2.841
Shaohua Fan,Shikai Wang,Hongtao Sun,Shiyu Sun,Guojun Gao,Lili Hu
We report efficient dual-mode up-conversion (UC) and down-shifting (DS) emission in a single Yb 3+ /Er 3+ -co-doped β-NaYF 4 microcrystals with controlled morphology and size via a simple Na + ion-exchange modification (IEM) method. IEM well preserves the crystal structure and monodispersed morphology of hydrothermal-synthesized β-NaYF 4 . Meanwhile, IEM gives rise to the significant enhancement of UC emission intensity up to 3800 times and strongly enhanced DS emission intensity of Er 3+ and Yb 3+ by several times in β-NaYF 4 :Yb 3+ ,Er 3+ microcrystals. IEM also strongly prolongs the DS emission lifetimes of Er 3+ and Yb 3+ in visible and near-infrared region. The enhanced UC and DS emission intensities and prolonged lifetimes in β-NaYF 4 :Yb 3+ ,Er 3+ are mainly ascribed to the dispersing of localized Yb 3+ and Er 3+ clusters during IEM.
研究领域:
材料科学
·
光子学
·
纳米技术
·
光学材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qibing Li,Yingying Zhang,Zhijie Wu,Tianhui Wang,Jianbei Qiu,Zhiguo Song,Yongjin Li
In this work, a series of Yb 3+ /Tb 3+ co-doped BiOBr nanosheets were synthesized by a simple solvothermal method, and the effect of Tb 3+ and Yb 3+ doping on the up-conversion (UC) luminescence was investigated. Under the excitation of 980 nm, BiOBr: Yb 3+ /Tb 3+ nanosheets displayed emission bands at 494, 544, 584 and 622 nm arise from transitions 5 D 4 → 7 F J ( J = 6, 5, 4, 3) of Tb 3+ ions, respectively. Furthermore, the concentration dependence of UC luminescence was comprehensively explored, and the BiOBr:15%Yb 3+ /3%Tb 3+ nanosheets exhibited the most outstanding luminescent properties by the cooperative energy transfer. Moreover, the degradation rate of RhB by Yb 3+ /Tb 3+ co-doped BiOBr reaches 98.9% for 30 min under full spectral irradiation, and 51.7% for 5 h under 980 nm irradiation, respectively. This work proves that Yb 3+ /Tb 3+ co-doped BiOBr nanosheets have excellent green UC emission and have potential application in the field of near infrared activated photocatalysts .
研究领域:
材料科学
·
光催化
·
发光材料
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纳米材料
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稀土掺杂
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 48
·17128-17135
·
IF 6.4
Shuofeng Sun,Yuming Yang,Renfei Zhang,Qinan Mao,Lang Pei,Junhua Xi,Yang Ding,Yiwen Zhu,Hua Yu,Jiasong Zhong
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) offer distinct advantages over traditional NIR light sources in the miniaturization of spectrometers. Nevertheless, the lack of highly efficient NIR phosphors with a large bandwidth hinders their practical applications. Herein, a novel Cr3+-doped (Ca1−xLix)(Mg1−xScx)Si2O6 phosphor with a broadened emission has been successfully developed by controlling the lattice disorder via [Li+–Sc3+] chemical unit substitution in CaMgSi2O6:Cr3+. Upon exciting the phosphor with 455 nm blue light, (Ca0.5Li0.5)(Mg0.5Sc0.5)Si2O6:4%Cr3+ exhibits notable NIR emission centered at approximately 847 nm, featuring a full width at half-maximum (FWHM) of 172 nm. The disordered occupation of Ca2+/Li+ and Mg2+/Sc3+ enhances the electron–phonon coupling effect, resulting in a broader emission of (Ca0.5Li0.5)(Mg0.5Sc0.5)Si2O6:Cr3+ compared with that of CaMgSi2O6:Cr3+. In order to further broaden the emission band, an energy transfer (ET) strategy is explored. By leveraging the ET process from Cr3+ to Yb3+, the FWHM of (Ca0.5Li0.5)(Mg0.5Sc0.5)Si2O6:4%Cr3+,0.4%Yb3+ is significantly increased up to 264 nm. The phosphor possesses a quantum yield of 46% and a thermal stability of 69% at 423 K. The NIR pc-LED utilizing the (Ca0.5Li0.5)(Mg0.5Sc0.5)Si2O6:Cr3+,Yb3+ phosphor yields an NIR optical power of 57.31 mW at a driving current of 300 mA, and achieves 10.01% photoelectric conversion efficiency at 25 mA, exhibiting promising potential for application in bio-imaging and food analysis.
研究领域:
材料科学
·
光学材料
·
固态照明
·
光子学
·
无机化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 4
·6246-6253
·
IF 5.532
Jingxin Li,WenYan Zhang,XueFang Wang,RunQiu Peng,BingKai Gao,Qian Wu,Zicai Zhang,Zhijun Wang
In recent years, the broadband near-infrared (NIR) spectroscopy technology has been widely used in the field of nondestructive testing . However, these existing NIR phosphors showed relatively short emission wavelengths , narrower half-maximum full-width (FWHM), and narrower half-peak widths, importantly, few phosphors presented the emission from 950 nm to 1100 nm. In order to solve these problems, the Yb 3+ /Cr 3+ ions codoped La(Mg 0.5 Sn 0.5 In 0.5 Sc 0.5 ) 0.5 O 3 (LMSIS) was synthesized by the solid-state method, and the emission spectrum of LMSIS:Cr 3+ can be extended to the NIR long-wave region due to the energy transfer of Yb 3+ and Cr 3+ , and the thermal stability of the phosphor can be improved due to the inherent temperature stability of the Yb 3+ f-f transition. The NIR phosphor converted light emitting diodes (pc-LEDs) were fabricated by combining the LMSIS:0.003Cr 3+ , 0.0015Yb 3+ with blue LED chip, which can be expected to be used in the field of broadband near-infrared non-destructive detection.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
发光材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Lijun Chen,Zhengce An,Liping Lu,Yangyang Zhang,Yuee Chen,Haiying Sun
The most effective approach to regulating the color of upconversion luminescence is through doping with lanthanide ions that possess the ability to regulate energy processes, which holds significant importance for the application of upconversion luminescent materials in the domains of optical data storage and anti-counterfeiting technology. In this work, a multi-component upconversion luminescent material NaYF 4 : Er 3+ , Yb 3+ , Ce 3+ with near-infrared response and Er 3+ doping ranging was prepared by low-temperature combustion synthesis. Due to the unique 4f 13 electronic configuration of Yb 3+ , the probability of Er 3+ falling into the trap energy level increases, thereby reducing the emission of Yb 3+ . The emission color of Er 3+ can be altered by doping with Ce 3+ , which is different from the enhancement of red emission by Ce 3+ in other studies. In addition, the different luminescent properties of the samples under different wavelengths of excitation were studied, and a fluorescence security mode was designed to demonstrate its potential application value in anti-counterfeiting and hiding important information. This research offers new insights into the mechanisms underlying the upconversion phenomenon in Er 3+ through multi-ion doping, and provides new approaches for the design of photochromic upconversion phosphors.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yuzhen Wang,Chuandong Zuo,Chaoyang Ma,Wanggui Ye,Chong Zhao,Zhe Feng,Yanbin Li,Zicheng Wen,Chong Wang,Xiaofei Shen,Xuanyi Yuan,Yongge Cao
This work focused on influences of Sc 3+ dopants on local site symmetry and ligand field of Er 3+ activators as well as its up-conversion luminescence performances sensitized by Yb 3+ ions in NYTiO 4 (NYT). The structure analysis and Judd-Ofelt calculation confirmed that doping Sc 3+ ions could lower site symmetry as well changed the ligand field around Er 3+ ions. The introduction of Sc 3+ ions induced variations of crystal lattices , regulated distances between Er 3+ ions and Er 3+ or Yb 3+ ions, and thus influenced the up-conversion luminescence properties . Besides, time-resolved decay curves figured out the great enhancement of lifetime and luminescence quantum efficiency for both green and red emissions due to Sc 3+ dopants. For optical temperature sensitivity, thermally coupled levels (TCLs) for blue emission 4 F 5/2 / 4 F 7/2 → 4 I 15/2 was studied for the first time. Besides, TCLs for violet emission 4 G 11/2 / 2 H 9/2 → 4 I 15/2 as well as green emission 2 H 11/2 / 4 S 3/2 → 4 I 15/2 were also recorded. By tri-doping Sc 3+ ions into NYT: Yb/Er, both absolute sensitivity and relative sensitivity of above three TCLs were improved with temperature uncertainty decreasing.
研究领域:
材料科学
·
发光材料
·
固态化学
·
光学物理
·
稀土掺杂
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jinyuan Zhang,Tong Liu,Tian Shi,Zhiyuan Cheng,Fuhua Gao,Da Cai,Shenghong Yang,Yueli zhang
Constructing comprehensive performance-enhanced heterostructured composite using the synergistic effect of complementary advantages between heterogeneous materials has always been challenging. In this work, highly stable β-NaYF 4 :Yb 3+ , Tm 3+ @BiOCl (NYF@BiOCl) heterostructured upconversion composites were successfully prepared using a two-step hydrothermal method. Compared to NYF/BiOCl mechanical mixtures, NYF@BiOCl with intimate interface show a higher photocatalytic degradation rate of rhodamine B (RhB) aqueous solutions, achieving 99.9% in 18 min and 98% in 2 h under simulated sunlight and near-infrared (NIR) light, respectively. The construction of heterostructures has a broad-spectrum response, which improves the utilization of sunlight and achieves efficient photocatalytic degradation of organic contaminants. Upconversion luminescence mechanism, spectral overlap, and Förster resonance energy transfer (FRET) explain the high photocatalytic activity of NYF@BiOCl. Meanwhile, NYF@BiOCl exhibits good universality to efficiently degrade other organic contaminants (methyl orange (MO), methylene blue (MB), bisphenol A (BPA), p-chlorophenol (4-CP)). This study demonstrates the potential of synergistic effects between heterogeneous materials. It Enhanced the photocatalytic activity of the NYF@BiOCl heterostructured composites driven by NIR light, providing a new strategy for energy-efficient and degradation of hazardous organic contaminants to alleviate environmental pollution.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 27
·10612-10622
·
IF 4.569
Yuhong Zhang,Pengcheng Wang,Haiyan Wang,Xingke Zheng,Yibin Guo,Nan Zhang,Hang Liu
Phosphors with rare earth (RE) ions are widely applied to optical temperature measurements. Moreover, the near-infrared (NIR) emission of phosphors has potential applications in the biological field. Herein, Gd2O3:x%Nd3+/Yb3+(0.2 ≤ x ≤ 0.8) samples are successfully synthesized by the sol–gel method, and their phase and morphology are characterized. The XRD data are refined by Rietveld. Under 980 nm continuous wave (CW) laser excitation, the upconversion (UC) and downshift (DS) emissions are studied. The temperature sensing performances of thermally coupled levels (TCLs) and non-thermally coupled levels (non-TCLs) of Gd2O3: Nd3+/Yb3+ phosphors are investigated through the fluorescence intensity ratio (FIR) technology. In the temperature range of 303–523 K, the maximum relative sensitivity of I761 nm/I550 nm reaches 6.54% K−1, which is based on non-TCLs. At the same time, the maximum relative sensitivity of I761 nm/I1000 nm–1500 nm reaches 3.13%. In addition, the influence of the laser induced heating (LIH) effect is studied. Compared with square wave (SW) pumping, the relative sensitivity would decrease at CW excitation. Finally, the durability and temperature uncertainty are also discussed. The results prove that the Gd2O3:Nd3+/Yb3+ samples present higher relative sensitivity and durability and lower temperature uncertainty in the biological window. Therefore, the phosphors can be used as optical thermometers in the biological field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7385-7394
·
IF 3.925
Xia Xu,Meirong Fu,Min Yang,Bing Hu,Jitao Yang,Wenjun Gui,Jinxiu Guo
4-Nitrophenol (4-NP) is one of the main toxic water pollution substances. Most 4-NP fluorescence detection methods are based on the change in the fluorescence intensity of a single emission peak, which has low sensitivity, accuracy, and narrow analytical ranges. Herein, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au were designed and synthesized for the quantitative detection of 4-NP due to the fluorescence intensity ratio of two upconversion emission peaks, the analytical range is 0.01–100 μg mL−1 and the detection limit is 0.01 μg mL−1. In addition, 1.66 nm Au nanoparticles randomly distributed on the surface of composite nanomaterials can effectively cause the catalytic reduction of 4-NP. Therefore, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au is a type of composite nanomaterial with great development potential and application prospects in the detection and catalysis of 4-NP.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Linxuan Wang,Xu Yang,Maohui Yuan,Zining Yang,Kai Han,Hongyan Wang,Xiaojun Xu
In this work, a series of Nd 3+ and Yb 3+ codoped SrF 2 nanocrystals (NCs) were synthesized by the hydrothermal method . The TEM results show that the average size of these NCs is approximately ∼50 nm. The structure of SrF 2 NCs and its optical properties of near-infrared (NIR) downconversion luminescence (DCL) are systematically characterized. Under the excitation of 808 nm laser, intense NIR DCL centered at 976 nm from Yb 3+ ions is experimentally determined. The mechanism of the DCL is further interpreted based on the efficient energy-transfer (ET) processes from Nd 3+ to Yb 3+ . In addition, utilizing the fluorescence intensity ratio (FIR) technique, the temperature sensing behaviors of SrF 2 :Nd 3+ /Yb 3+ (15/4 mol%) are also investigated through the heterogeneously coupled states between Nd 3+ ( 4 F 3/2 → 4 I 11/2 ) and Yb 3+ ( 2 F 5/2 → 2 I 7/2 ) in a temperature range of 298–573 K. The results confirm that the maximum thermal sensitivity is up to 0.00346 K −1 at 473K. The excellent thermal sensitivity of these NCs, particularly the DCL located at the NIR region, have the potential for biological applications and temperature measurement at the nanoscale .
✓ 已验证
产品关联
DOI
高影响因子
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