JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Boxu Xu,Chao Song,Jie Song,Rui Huang,Zhenxu Lin,Yi Zhang,Shaomin Lin,Jun Song
In this study, a series of well-crystallized Yb 3+ /Er 3+ /Tm 3+ -tridoped Y 2 O 3 –ZnO ceramic phosphors were prepared using sol–gel synthesis, and the phosphor structures were studied using X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis . The phosphors had excellent physical stability and porous structure. All phosphors generated blue, green, and red emission bands attributed to Tm: 1 G 4 → 3 H 6 , Er: 2 H 11/2 ( 4 S 3/2 )→ 4 I 15/2 , and Er: 4 F 9/2 → 4 I 15/2 radiative transitions , respectively. The emissions were intensified twice by tuning the Tm 3+ ratio in the host matrix Y 2 O 3 and ZnO parts. The color coordinates were adjusted by tuning both the Tm 3+ concentration and the excitation laser pump power to shift the color coordinates and only enhance the brightness, respectively. Meanwhile, heating phosphors can also linearly adjust the color coordinates of the luminescence. Therefore, it can also be used as a fluorescence thermometer in the field of temperature sensor . The study findings will broaden the phosphor practical application potential.
研究领域:
材料科学
·
光学
·
陶瓷
·
发光材料
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-9
·
IF 3.8
Liu Yongtao,Duan Bin,Zhou Lin,Wu Yuxiang,Wang Fengyi,Ding Changchun,Hu Junshan
Here, this study reports single-band red upconversion emission in β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ phosphor by doping Mn 2+ . The optimum concentration of Mn 2+ ions in β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ phosphor was 0.20. The intensity of red and green emissions is increased by 27.4 and 19.3 times, respectively. Compared with the samples without Mn 2+ ions, the red-green integral strength ratio of β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ /Mn 2+ sample was significantly increased by 28.4 times, reaching 110.9. The UCL mechanism was explored by analyzing the down-conversion luminescence spectra, absorption spectra, UCL spectra, and upconversion fluorescence lifetime decay curves of Yb 3+ /Er 3+ /Mn 2+ co-doped β-Ba 2 ScAlO 5 . The enhancement of upconversion red light is achieved through energy transfer between defect bands and Er 3+ ions, as well as energy transfer between Mn 2+ ions and Er 3+ ions. In addition, the Mn 2+ doped β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ red UCL phosphors have great potential for ambient temperature sensing in the 298–523 K temperature range. The maximum sensitivity of β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ /Mn 2+ phosphor as a temperature sensor at 523 K is 0.0247 K −1 .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2012
·
IF 2.307
Yanjie Liang,Kangning Sun,Weili Wang,Pengfei Chui,Xiaolin Sun
In this paper, YVO 4 :Yb 3+ ,Er 3+ microspheres have been successfully prepared through a facile hydrothermal method assisted with disodium ethylenediaminetetraacetic acid and citric acid. X-ray diffraction, field emission scanning electron microscopy , energy disperse X-ray spectroscopy, high resolution transmission electron microscopy , and photoluminescence spectra were used to characterize the samples. The results reveal that the as-prepared YVO 4 :Yb 3+ ,Er 3+ samples are well-crystallized and spherical in shape. Moreover, the microspheres with diameters of 6–8 μm are assembled by numerous submicron cuboids. Under the excitation of a 980 nm laser diode , the samples show the characteristic emissions of Er 3+ and the green emissions at 525 nm of 2 H 11/2 → 4 I 15/2 are dominantly strong.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Yurun Ma,Pingsun Qiu,Dongfang Xu,Jinrong Lin,Yanxue Tang,Feifei Wang,Xiyun He,Ziyao Zhou,Nianxiang Sun,Xinyang Zhang,Yi Zhou,Dazhi Sun
NaYF 4 nanorods , and nanoparticles co-doping with Yb 3+ and Er 3+ were synthesized by hydrothermal method . The effects of doped ion concentration, the ratio of NaF to Ln (NO 3 ) 3 and the reactant content on the luminescence properties of the nanocrystals were investigated in detail in this paper. The materials were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and photoluminescence (PL) spectra. The results indicate that a doping level of 20 mol% Yb 3+ and 2 mol% Er 3+ gives the strongest luminescence, and concentration quenching occurs, when Er 3+ concentration exceeds 5 mol%. Besides, the reaction of temperature and time were also investigated and the results showed that they have an effect on the shape, size, and crystal phase purity of the nanoparticles . The luminescence mechanism for the NaYF 4 :Yb 3+ , Er 3+ was discussed. Under 980 nm excitation, the Er 3+ ions doped into NaYF 4 samples emitted green fluorescence 520 nm ( 4 H 11/2 → 4 H 15/2 ), 550 nm ( 4 S 3/2 → 4 H 15/2 ) and red fluorescence 650 nm( 4 F 9/2 → 4 I 15/2 ), which were modified and enhanced by Yb 3+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Jingxin Ding,Huazhen Liao,Libin Pang,Deping Wang,Song Ye
Rare earth ions doped core-shell thermometers exhibit improved up-conversion emission behaviors, while the thermal sensitivity is not higher than the corresponding core-only structured luminescent thermometers via the thermal coupled levels based luminescence intensity ratio (LIR) technique. In this work, the core-only β-NaYF 4 : 16Yb 3+ , 4Er 3+ (C–4Er) up-conversion nanoparticles (UCNPs) and the sub 25 nm core-shell β-NaYF 4 : 16Yb 3+ , 4Er 3+ @0.5NaGdF 4 (CS–4Er@0.5Gd) and β-NaYF 4 : 16Yb 3+ , 4Er 3+ @1NaGdF 4 (CS–4Er@1Gd) UCNPs have been successfully synthesized by seed-mediated growth methods for temperature detection. The spectral study indicated that the up-conversion luminescence intensity of CS-4Er@0.5Gd and CS-4Er@1Gd was obviously enhanced compared withC-4Er. Luminescence intensity ratio originated from thermally coupled Stark sublevels (Stark-LIR) of Er 3+ ( 2 H 11/2 (1)(2), 4 S 3/2 (1)(2)(3)) of CS-4Er@0.5Gd and CS-4Er@1Gd has been firstly applied to calculated the relative thermal sensitivity (S R ) of core-shell UCNPs. As a result, S R of CS-4Er@1Gd is the largest among the considered UCNPs, and is increased from 10.95 × 10 −3 /K (LIR) to 17.80 × 10 −3 /K (Stark-LIR), indicating that with Stark-LIR techniques, the nano core-shell sensors behave a larger S R than core-only structured thermometers. This work may lead to an appropriate approach to improve the temperature sensitivity of core-shell thermometers for temperature sensing.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Zhou Zhiping,Yu Yingsen,Sun Quanmin,Liu Xiaotang,Lei Bingfu,Yan Yun
In this work, up-conversion phosphor CaF2:Yb3
+, Er3+ was synthesized by the co-precipitation method. X-ray Diffraction (XRD) and Photoluminescence Spectra (PL) were used to characterize the samples. The effects of annealing temperature and
Yb3+ and Er3+ concentrations on the luminescence properties were discussed. Strong green and red light were obtained under 980 nm laser excitation, the optimal annealing temperature was 600 °C, while the optimal doping concentration was 8 mol% Yb3+ and
0.6 mol% Er3+. The green (540 nm and 552 nm) and red (652 nm and 669 nm) up-conversion luminescence peaks can be ascribed to the transitions of 4S3/2-4I15/2 and 4F9/2-4I15/2, respectively. The
up-conversion luminescence intensities of the green and red emitting peaks can be changed by adjusting the concentration ratio of Yb3+ and Er3+. Hence, it can potentially be used as the red light conversion agent. The dependence of up-conversion intensities (CaF2:Yb3+,
Er3+) on excitation power indicated that two-photon absorption processes were responsible for green and red luminescence.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
EPL
·
2011
·Vol. 96
·期 1
·18001
·
IF 2.753
A. H. Li,Q. Lü
The knowledge of the power density for which luminescence intensity reversal begins with power increase is of valuable importance for practical applications. Under 980 nm CW diode laser excitation, the maximum upconversion luminescence intensities were obtained at 4800, 5700, and 7100 W/cm2 for 2H9/2→4I15/2, 2H11/2&4S3/2→4I15/2, and 4F9/2→4I15/2 transition luminescences, respectively, in compact powder composed by cubic-phase NaYF4:
Yb3+,Er3+ nanoparticles with a most probable diameter of ∼46 nm. It was revealed experimentally that the reversal power density decreases as luminescent level rises. Excitation increase combined with radiative quantum efficiency decrease as power increase can reproduce this "n"-shape power dependence relationship.
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
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Yanjie Liang,Pengfei Chui,Xiaoning Sun,Yan Zhao,Fuming Cheng,Kangning Sun
In this paper, YVO 4 :Yb 3+ ,Er 3+ nanoparticles have been successfully prepared via a facile hydrothermal technique in the presence of citric acid as a complexing agent followed by a subsequent heat treatment process. The nanostructures, morphologies and upconversion luminescent properties of the as-prepared YVO 4 :Yb 3+ ,Er 3+ upconverting nanoparticles were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescent (PL) spectra. XRD results indicate that all the diffraction peaks of samples can be well indexed to the tetragonal phase of YVO 4 . TEM images demonstrate that the samples synthesized hydrothermally consist of granular-like nanoparticles ranging in size from about 30 to 50 nm. After being calcined at 500–800 °C for 2 h, the grain sizes of nanoparticles increase slightly. Additionally, the as-prepared nanoparticles show bright green luminescence corresponding to the 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions of Er 3+ ions under the excitation of a 980 nm diode laser, which might find potential applications in fields such as phosphor powders, infrared detection and display devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
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
JOURNAL OF RARE EARTHS
·
2018
·
IF 2.524
Tao Pang,Wenbo Peng,Ming Yang,Jianping Xie,Wenhui Lu
An optical heater based on hexagonal NaGdF 4 :Yb 3+ /Er 3+ is reported. XRD , SEM and EDS characterization results show that F − /Ln 3+ can not only control the phase composition , particle size and morphology, but also affect the effective doping concentration of Yb 3+ and Er 3+ . When F − /Ln 3+ is 12/1, the strongest upconversion luminescence is obtained. Based on the luminescent temperature sensing behavior of Er 3+ , the photo-thermal conversion performance was investigated. The results indicate that the temperature of irradiation spot is linearly dependent on the power density, and the photo-thermal responsivity is determined to be 3.3 K·cm 2 /W. Also, it is found that the photo-thermal conversion efficiency can be regulated by changing the Yb 3+ doping concentration. Compared with the nano-gold, copper sulfide and carbon nanotubes , the NaGdF 4 :Yb 3+ /Er 3+ has the triple functions of upconversion luminescence, temperature sensing, and photo-thermal conversion, and may therefore be a promising optical heater for photo-thermal therapy of tumors.
研究领域:
材料科学
·
纳米技术
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Ronghui Cai,Jianhong Wu,Chunli Guo,Bining Tian
All inorganic double perovskites have been adopted as photo-luminescent hosts due to their high stability, absorption coefficient and carrier mobility. Various photo-luminescent properties are being investigated in double perovskites including infrared emitting, upconverting, afterglowing, temperature sensing and so on. Taking advantage of the Boltzmann distributed energy levels, erbium ions are gifted as spectral temperature sensing centers. Here, we synthesized Er 3+ doped monoclinic Ba 2 SrWO 6 (BSWO) double perovskites and carried out a series of examinations for their upconverting as well as temperature sensing characteristics. Upon 980 and 1550 nm excitation, the upconversion processes are determined by the relationship between emission intensities against excitation powers. The optical temperature sensitivities are evaluated by exploiting fluorescence intensity ratio (FIR) and lifetime, where the maximum values for FIR and lifetime sensitivities are 14.3 × 10 −3 and 2.2 × 10 −3 K −1 respectively, suggesting that Er 3+ doped double perovskites hold great potential for the development of novel optical temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 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）