CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiangyue Liu,Bing Li,Bin Duan,Shiying Guo,Shengli Zhang,Nan Meng,Zhaoyang Lou,Tong Liu,Junshan Hu,Hong Ge
Bi 2 O 3 phosphors co-doped with Yb 3+ and Er 3+ ions were successfully synthesized using a high-temperature solid-state method. Under 980 nm near-infrared laser excitation, Bi 2 O 3 : Yb 3+ /Er 3+ phosphors emit strong red light at 658 nm and weak green light at 551 nm. The optimal doping concentrations of Yb 3+ and Er 3+ are 0.10 and 0.02, respectively. This composition results in a red-to-green intensity ratio of 157.6. The red emission is primarily driven by energy transfer, promoting Er 3+ from the 4 I 13/2 level to the 4 F 9/2 level [Yb 3+ ( 2 F 5/2 ) + Er 3+ ( 4 I 13/2 ) → Yb 3+ ( 2 F 7/2 ) + Er 3+ ( 4 F 9/2 )]. The cross-relaxation process lowers the photon population in the 4 F 7/2 level and raises the photon population in the 4 F 9/2 level, leading to the occurrence of a single-band red emission. This phosphor also demonstrates promising potential for optical temperature sensing. It exhibits a maximum relative sensitivity of 3.02 % K −1 at 298 K.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 40
·16530-16540
·
IF 3.5
Xuekai Wang,Yongze Cao,Xianglan Yan,Sai Xu,Jinsu Zhang,Tianshuo Liu,Baojiu Chen
Cubic and hexagonal structured SrTa4O11(STO):Er3+/Yb3+ phosphors were synthesized by a solid state reaction (SSR) and molten salt synthesis (MSS). The upconversion luminescence (UCL) intensity of these samples was investigated. Hexagonal STO:Er3+/Yb3+ with much or a little β-Ta2O5 can be synthesized by SSR in air or vacuum, respectively, and the UCL intensity of the sample synthesized by SSR in a vacuum is higher. Cubic STO:Er3+/Yb3+ can be synthesized by MSS with KCl flux, and hexagonal STO:Er3+/Yb3+ can be synthesized by MSS with B2O3 flux, which has the strongest UCL intensity among all the samples compared with samples prepared by SSR. The sample by MSS with B2O3 flux was acid pickled (AP) with HCl solution, and the green UCL intensity increased by 2.18 times, which reached 32.95% for β-NaYF4:Er3+/Yb3+. The UCL intensity of the hexagonal STO:Er3+/Yb3+ is much higher than that of the cubic structure, which is due to the layered structure and the non-central symmetry of the Er3+/Yb3+ doped sites in hexagonal STO:Er3+/Yb3+. The temperature sensitivity of samples is evaluated by luminescence intensity ratio (LIR) technology. The maximum relative sensitivity is 0.0099 K−1 at 303 K. All the results show that hexagonal STO:Er3+/Yb3+ has excellent pure green UCL intensity and high temperature sensitivity, which can be used in UCL display and temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Heliyon
·
2024
·
IF 3.4
Jintao Xu,Shanlin Zhu,Canyuan Liao,Weijun Zhao,Xingyuan Zhong,Zijun Wang,Jiuping Zhong
High-sensitivity optical temperature measurement has attracted extensive attention in both fundamental studies and practical applications. In this study, a series of upconversion (UC) luminescence phosphors composed of NaGd(PO 3 ) 4 (NGP) doped with 20 at% Yb 3+ and various concentrations of Er 3+ (0.5 at% as the optimal concentration) was synthesized by high-temperature solid-state method. And their crystal structure and the distribution of lanthanide dopants were analyzed using X-ray diffraction with Rietveld refinement verifies. Under 980 nm laser excitation, the obtained phosphors show the characteristic Er 3+ upconversion green and red emission bands through two-photon processes. The fluorescence intensity ratio (FIR) based on the thermal coupled states demonstrates the thermal sensing ability in a wide temperature range of 200–573 K. The thermal sensitivity is relatively high with the maximum absolute thermal sensitivity S a of 0.53 % K −1 (523 K) and the maximum relative thermal sensitivity S r of 2.60 % K −1 . The phosphor NGP:Yb/Er also exhibits high repeatability as the thermal sensors reach 97 %. These findings postulate the potential of NGP:Yb/Er as a promising candidate in optical thermal sensing applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2016
·
IF 1.86
Zhen Wei,Wei Zheng,Zhiyong Zhu,Xiongfei Guo
SrWO 4 :Er 3+ /Yb 3+ phosphors are synthesized by a solid state reaction . The XRD patterns indicate that the doping ions will not change the phase of SrWO 4 . Under the excitation at 980 nm, SrWO 4 :Er 3+ /Yb 3+ phosphors show emission bands in green and red regions. The temperature-dependence of upconversion efficiency and temperature-sensing properties of SrWO 4 :Er 3+ /Yb 3+ phosphors have been discussed according to the fluorescence intensity ratio of green emissions from 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transitions of Er 3+ in the range of 95–775 K under the excitation at 980 nm. The maximum sensitivity of SrWO 4 :1%Er 3+ /6%Yb 3+ phosphor is found to be 0.01282 K −1 at 489 K.
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 Materials Chemistry C
·
2016
·Vol. 4
·期 8
·1675-1684
·
IF 5.066
M. Wu,E. H. Song,Z. T. Chen,S. Ding,S. Ye,J. J. Zhou,S. Q. Xu,Q. Y. Zhang
Single-band red upconversion (UC) emission of Er3+ has been successfully achieved in Yb3+/Er3+ codoped KMgF3 nanocrystals via a nonequivalent substitution strategy, in which lanthanide ions probably aggregate, as evidenced by density functional theory calculations and upconversion dynamic processes. The aggregation of Yb3+/Er3+ would cause large cross-relaxation probabilities among the lanthanide ions when photo-excited, resulting in the disappearance of the green emission and the population of the red emitting level of Er3+. Interestingly, the single-band feature is independent of the dopant concentration and pump power. The possible UC mechanism is discussed in detail according to nanocrystal morphology, ion radii, lattice parameters and decay lifetime studies of the Yb3+–Er3+ doped analogous compounds (KMgF3, KZnF3 and KCdF3). It could be concluded that Yb3+/Er3+ ions tend to aggregate in KMgF3, resulting in the largest ratio of red to green UC emission. This research may give a perspective toward tuning the UC emission of lanthanide ions.
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 THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2024
·Vol. 41
·期 3
·798-808
·
IF 1.8
Shengyi Liu,Duan Gao,Li Wang,Wenbin Song,Zhiliang Zhang,Shitao Wang,Ying Zhu,Qi Zhang
${{\rm Er}^{3 +}}/{{\rm Yb}^{3 +}}$ co-doped ${{\rm SrBi}_4}{{\rm Ti}_4}{{\rm O}_{15}}$ crystalline powders were synthesized using the high-temperature solid-phase method. The crystal structure of the obtained phosphors was analyzed through x-ray diffraction (XRD), confirming the purity of all products such as ${{\rm SrBi}_4}{{\rm Ti}_4}{{\rm O}_{15}}$. Employing experimental design optimization theory, regression equations were established to correlate the ${{\rm Er}^{3 +}}/{{\rm Yb}^{3 +}}$ doping concentrations with the luminescent intensities. The genetic algorithm was utilized to compute the optimal solutions of the equations, resulting in ${{\rm Er}^{3 +}}$ and ${{\rm Yb}^{3 +}}$ doping concentrations of 3 mol% (molar fraction) and 20 mol% under 980 nm laser excitation and 3 mol% and 29.79 mol% under 1550 nm laser excitation. The up-conversion fluorescence emission spectra of the samples were measured under 980 nm excitation, revealing intense green emissions at 525 nm, 550 nm, and 662 nm, corresponding to the $^2{{\rm H}_{11/2}}{\to}{^4}{{\rm I}_{15/2}}$, ${^4}{{\rm S}_{3/2}}{\to}{^4}{{\rm I}_{15/2}}$, and $^4{{\rm F}_{9/2}}{\to}{^4}{{\rm I}_{15/2}}$ energy levels, respectively. Under 1550 nm excitation, peaks corresponding to the same energy levels were observed at 523 nm, 548 nm, and 661 nm. The relationship between the up-conversion fluorescence and the laser operating current for the optimal samples under 980 nm and 1550 nm excitations was explored, indicating two-photon and three-photon processes, respectively. Detailed analysis and discussion of the up-conversion fluorescence mechanisms were conducted. Additionally, the relationship between the up-conversion fluorescence and the temperature for the optimal samples was investigated, revealing excellent temperature sensing characteristics under 980 and 1550 nm laser excitations. The CIE coordinates for the optimal samples were calculated as (0.3111, 0.6747) and (0.5254, 0.4671) under 980 nm and 1550 nm excitations, respectively.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 40
·9598-9607
·
IF 5.066
M. Wu,X. F. Jiang,E. H. Song,J. Su,Z. T. Chen,W. B. Dai,S. Ye,Q. Y. Zhang
Successful upconversion (UC) tuning from multi-bands to one single red band from Er3+ ions was realized in cubic perovskite ABF3:Yb3+/Er3+ (A = K, Cs; B = Zn, Cd) through Mn2+ doping. Based on UC emission spectra and decay kinetics of KZnF3:Yb3+/Er3+ with different Mn2+ contents, a bidirectional energy transfer process between Mn2+ and Er3+ ions was confirmed to explain the UC tuning mechanism. More importantly, we studied the influence of the Mn2+ energy level position on the UC properties for Er3+ in ABF3 hosts. Interestingly, great enhancement of green UC emissions was observed for Er3+ ions in KCdF3 and CsCdF3 hosts upon Mn2+ doping. Comparison of UC emissions and lifetimes of Er3+ ions in the three materials was carried out to probe the different UC processes in ABF3 (A = K, Cs; B = Zn, Cd) hosts. The different energy transfer mechanism between Mn2+ and Er3+, which is affected by the Mn2+ energy level position, was proposed to explain the UC difference in the three matrices. This research convincingly confirmed the occurrence of energy transfer between Er3+ and Mn2+ ions and provided deep insights into the importance of the Mn2+ energy level position in tuning the UC properties of Er3+ in diverse hosts, while allowing us to better control the UC properties through Mn2+ doping.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 34
·1-8
·
IF 2.8
Zhang Gang,Yuwen Juntao,Lü Ruoxi,Wang Qing,Tang Zhipeng,Wu Kaiming
Precipitation of functional nanocrystals into glasses can endow many interesting properties to glasses and widen their application fields. In this work, optically active rare-earth ions doped Lu 4 Zr 3 O 12 nanocrystals were precipitated in silicate glasses through conventional melt-quenching and subsequent thermal treatment method. X-ray diffraction and transmission electron microscopy analysis confirmed the precipitation of Lu 4 Zr 3 O 12 nanocrystals upon thermal treatment. Absorption, emission and excitation-wavelength dependent emission spectra confirmed that Er 3+ ions were incorporated into Lu 4 Zr 3 O 12 nanocrystals. Green up-conversion emission was observed from these Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses, and the temperature-dependent up-conversion emission showed that the Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses had potential for low-temperature optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 67
·54769-54776
·
IF 3.84
Chunxiao Lu,Yang Chen,Yun Li,Chunhong Ma,Hongbo Zhang,Yuwei Guo,Jun Wang
A highly effective and stable up-conversion luminescence agent, Er3+:Y3Al5O12, was synthesized by sol–gel and calcination methods. Then, as a novel visible-light photocatalyst, Er3+:Y3Al5O12, Pt and PdS (as dual co-catalysts) decorated ZnS nano-sized composites, Er3+:Y3Al5O12/Pt–PdS/ZnS, were fabricated by deposition–precipitation and ultrasonic dispersion methods. All prepared samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). UV-vis absorption and PL spectra of Er3+:Y3Al5O12 were also determined. The visible-light photocatalytic H2 production activity of the prepared Er3+:Y3Al5O12/Pt–PdS/ZnS was evaluated by using Na2S and Na2SO3 as sacrificial reagents in an aqueous solution under 300 W irradiation from a xenon lamp. In addition, some influential factors such as Er3+:Y3Al5O12 and ZnS mass ratio, catalyst amount, irradiation time and irradiation intensity on visible-light photocatalytic H2 production of Er3+:Y3Al5O12/Pt–PdS/ZnS were investigated in detail. It was found that Er3+:Y3Al5O12 can effectively improve the visible-light photocatalytic activity of ZnS. Particularly, Er3+:Y3Al5O12/Pt–PdS/ZnS with 0.13 wt% PdS and 0.3 wt% Pt and a 0.30 : 1.00 mass ratio shows the highest photocatalytic H2 production activity in the sulfide/sulfite (0.2 mol L−1 Na2S and 0.3 mol L−1 Na2SO3) aqueous solution as sacrificial reagents.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Daobin Zhu,Junshan Hu,Yuxiang Wu,Keyu Guo,Changchun Ding,Rangrang Fan,Chunfeng Dong,Wei Jin,Yongtao Liu
Er 3+ ions and Yb 3+ ions co-doped indium oxide (In 2 O 3 ) phosphors were successfully synthesized by high temperature solid phase method. At 980 nm laser excitation, the phosphor has weak 552 nm green and strong 661 nm red emission bands. And the upconversion luminescence (UCL) intensity of red light is significantly stronger than that of green light. They are attributed to the 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. And the optimal sample is In 2 O 3 : 4 % Er 3+ , 10 % Yb 3+ . The appearance of phosphor was observed by field emission scanning electron microscopy. The UCL of phosphor is a two-photon process based on power dependence. In addition, photoluminescence excitation spectra and down-conversion luminescence spectra are used to explain the luminescence mechanism. The temperature sensing property of the phosphor in the temperature range of 348 K–598 K were tested. The sensitivity were obtained by fluorescence intensity ratio ( FIR ). The fit degree of FIR is 0.9936. It achieves a maximum relative sensitivity of 0.73 % K −1 at 348 K and a maximum absolute sensitivity of 0.039 K −1 at 373 K. In 2 O 3 : Er 3+ , Yb 3+ phosphors with high quality luminescence and excellent sensitivity have important application value in non-contact temperature measurement.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
T. Wei,Y.Q. Wang,C.Z. Zhao,X.X. Dong,J.H. Wang
Filled tetragonal tungsten bronze (TTB) structure Sr 4 La 2 Ti 4 Nb 6 O 30 co-doped by Er 3+ and Yb 3+ (SLTN: x Er 3+ – y Yb 3+ ) ceramics with different x and y were synthesized, and their crystal structure, upconversion photoluminescence (UC-PL), and dielectric permittivity were investigated for the first time. Under 980 nm infrared (IR) excitation, bright single-band UC green (515–570 nm) emission was observed for SLTN: x Er 3+ – y Yb 3+ ( x =0.05, y =0), however, featured two-bands UC emission (515–570 nm and 640–690 nm) was confirmed for all SLTN: x Er 3+ – y Yb 3+ ( x =0.05, y ≠0) samples. Two-photon energy transfer process was proved through pumping laser power dependence of emission intensity measurement. It is believed that energy back transfer (EBT) process should be mainly responsible for the two-bands UC emission. In addition, the dielectric properties were also discussed for SLTN: x Er 3+ – y Yb 3+ system.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2494-2504
·
IF 6.4
Xinxu Li,Bingting Bao,Xinyu He,Guoqiang Wang,Yantang Huang,Lingyun Li,Yan Yu
Optical temperature sensing technology, especially the fluorescence intensity ratio (FIR) type sensor based on Er3+, Yb3+ co-doped up-conversion (UC) luminescent materials, presents numerous opportunities in the field of temperature detection. Various Er3+, Yb3+ co-doped fluorides and oxides have been explored for the application of temperature sensing. Most of these Er3+, Yb3+ co-doped sensing materials are phosphors, for which the high temperature phase and chemical stability is still challenging. The Er3+, Yb3+ co-doped oxide single crystal is a promising solution to explore temperature sensing materials with practical application ability. In this work, an Er3+, Yb3+ co-doped LaBMoO6 single crystal (LBMO-SC: Er3+, Yb3+) is grown through flux assisted spontaneous crystal growth technology. Compared with the Er3+, Yb3+ co-doped LaBMoO6 polycrystalline samples (LBMO-PC: Er3+, Yb3+), the LBMO-SC: Er3+, Yb3+ shows improved UC performance with enhanced light emission and prolonged luminescence lifetime. The UC performance improvement results from the more efficient energy transfer between Yb3+ and Er3+. The energy transfer efficiency from Yb3+ to Er3+ in the LBMO-PC: Er3+, Yb3+ powders sintered at 1000 °C for 15 h is 7.3%, while it is 29.7% in the LBMO-SC: Er3+, Yb3+. The strong UC luminescence of LBMO-SC: Er3+, Yb3+ extends the temperature detection range; the luminescence of 4S3/2 → 4I15/2 in LBMO-SC: Er3+, Yb3+ is still measurable even when the temperature reaches 570 K. The LBMO-SC: Er3+, Yb3+ has a maximum value of relative temperature sensitivity of 1.16% K−1 at 300 K. Finally, an optical fiber type temperature sensor with practical application capability is successfully fabricated by using LBMO-SC: Er3+, Yb3+ as the luminescence sensing medium.
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）