JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xin Chen,Linwen Jiang,Luhui Zhou,Mingyu He,Jiangtao Li,Anhua Wu,Hongbing Chen
The Er 3+ @Yb 3+ co-doped SrAl 2 B 2 O 7 phosphors were prepared by a sol-gel auto-combustion method. The components, microstructure and up-conversion (UC) properties of samples were investigated systematically. The phosphors emitted red light and green light under the excitation of 980 nm wavelength. The intensity of red emission and green emission nearly linearly decreased with increasing ambient temperatures. The red emission, green emission and their intensity ratio as a function of Er 3+ concentrations and Yb 3+ concentrations were studied in detail. The results show that 4.0% Er 3+ and 8.0% Yb 3+ doped samples can obtain the best luminescence intensity while the best light purity cannot be obtained simultaneously. The intensity of red and green emission was measured as a function of excitation power. It indicates that there was no photon avalanche mechanism for SrAl 2 B 2 O 7 : Er 3+ @Yb 3+ due to the absence of sharp change of n values. The UC luminescence corresponded to a two-photon absorption process which was illustrated by the energy transfer mechanism and the steady-state rate equations. Because of the controllable monochromatic luminescence and excellent temperature-dependent luminescence properties, the SrAl 2 B 2 O 7 : Er 3+ @Yb 3+ phosphors have potential application in the fields of non-contact temperature measurement and bio-polychromatic label.
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
·
2026
·
IF 3.8
Mingrui Li,Zhenchuan Hu,Fuyan Su,Ruo Wang,Ruihua Tan,Mei Ding,Piaoyang Wu,Wei Wang
Yb 3+ /Er 3+ -doped up-conversion materials have been widely used in many fields due to high up-conversion efficiency in the visible region. However, it is still challenging to achieve high thermal stability in Yb 3+ /Er 3+ system owing to the non-radiative relaxation. Herein, Er 3+ and Yb 3+ co-doped LuTaO 4 phosphor is synthesized via a high-temperature solid-state method, and we successfully apply the phosphor into ceramic. The integrated emission intensity of the green luminescence could maintain 87.1% of initial intensity at 418 K. Besides, the peaks located at 521 nm and 528 nm achieve anti-thermal-quenching performance, showing an enhancement of 2.28 times and 2.13 times at 418 K, respectively. Based on the optical characterization and fluorescence intensity ratio calculation, a relative sensitivity of 1.432% K −1 at 298 K and an absolute sensitivity of 0.4757% K −1 at 538 K are achieved. In addition, the prepared ceramics also exhibit excellent thermal stability and FIR sensitivity. This work initiates a feasible strategy to accelerate the development of up-conversion luminescent phosphors with excellent thermal stability.
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Xu Liu,Yongze Cao,Wangzhong Mu,Chen Tian,Huanhuan Zhang,Guangming Niu,Mengxue Cao,Changhao Yu,Yichao Wang,Jinsu Zhang,Xizhen Zhang,Xiangping Li,Baojiu Chen
Using K2Mo3O10 and B2O3 as the solvent and BiTa7O19:Er3+/Yb3+ powder as the precursor, BiTa7O19:Er3+/Yb3+ single crystals were synthesized by the molten salt method in a platinum crucible. Utilizing scanning transmission electron microscopy (STEM) images recorded with a high-angle annular dark field (HAADF) detector and an annular bright field (ABF) detector, it is demonstrated that Er3+/Yb3+ can replace the sites in the (Ta/Bi)O6 layer and can also exist in the interstices between the (Ta/Bi)O6 layer and the TaO7 layer. BiTa7O19:Er3+/Yb3+ in the (Ta/Bi)O6 layer has a disordered structure and belongs to the P63/mcm (193) space group, rather than the ordered P6̅c2 (188) space group. Since three-layer TaO7 stacking was observed, the growth mode of the single crystal was inferred to be a piece-by-piece stacking process of the precursor blocks. This is because using raw materials rather than precursors is not sufficient to grow large-sized single crystals with high-quality. Under 980 nm laser excitation, the sample emits pure green upconversion luminescence, which is caused by the 2D distribution of Er3+/Yb3+. The shift rate of the peak centroids reached 0.173 nm GPa–1 under high pressure. The absolute and relative temperature sensitivities reached 0.851% and 0.83% K–1, respectively. In phosphor-converted 980 nm LEDs fabricated based on the samples, the CIE color coordinate can reach (0.21, 0.75), which exceeds the NTSC standard. This indicates that this crystal can be used for pressure and temperature sensing, along with UCL display applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
De-Yin Wang,Peng-Cheng Ma,Jia-Chi Zhang,Yu-Hua Wang
Samples of Er3+–Yb3+ co-doped Y7O6F9 are synthesized by solid state reaction method, and their down- and up-conversion luminescence are studied. Upon excitation into the 4F7/2 level of Er3+ at 490 nm, effective energy transfer from Er3+ to Yb3+ via cross-relaxation Er3+ (4S3/2) + Yb3+ (2F7/2) → Er3+ (4I13/2) + Yb3+ (2F5/2) occurs, splitting an absorbed high-energy photon (λ = 490 nm) into two photons (λ = 1000 and 1540 nm). Based on the changing of the lifetime of Er3+4S3/2 → 4I15/2 emission without and with Yb3+, the efficiency of Er3+ → Yb3+ energy transfer in Y7O6F9:1%Er3+,9%Yb3+ has been evaluated to 58%. Upon excitation at 980 nm, as the Yb3+ doping concentration increases, not only an overall increase in intensity but also an enhancement of the red (4F9/2 → 4I15/2) emission with respect to the green (4S3/2 → 4I15/2) emission were observed. Under 980 nm laser excitation with power of 20 mW, the overall integrated emission intensity in the 500–700 nm of Y7O6F9:1%Er3+,5%Yb3+ is 1.8 times higher than that of β-NaYF4:2%Er3+,18%Yb3+ that is to date the most efficient up-conversion phosphor. In view of the efficient down-/up-conversion in Er3+-Yb3+ co-doped Y7O6F9, this material is expected to be used to enhance the efficiency of solar cells.
研究领域:
材料科学
·
光子学
·
可再生能源
·
发光材料
·
太阳能电池
✓ 已验证
DOI
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Xingyue Chen,Yichun Zhang,Yunkang Bu,Yu Chen,Yanling Chen,Jie Fu,Jie Li,Degang Deng
In order to develop a new up-conversion luminescent temperature measurement material with a garnet structure, Ca 3 Y 2 Ge 3 O 12 : Er 3+ , Yb 3+ phosphors were prepared by a simple high temperature solid phase method. The structural phase and luminescence characteristics of the samples were characterized by X-ray powder diffraction, field emission scanning electron microscopy and photoluminescence spectra. It can be observed that the characteristic emission of Er 3+ ion appears in the sample under 980 nm excitation, and it's up-conversion emission intensity increases with the increase of Yb 3+ ion concentration . The maximum relative sensitivity is 1.29 %K −1 , 1.09 %K −1 and 1.03 %K −1 based on the different temperature dependence of the thermal coupled energy levels (TCELs), non-thermal coupled energy levels (NTCELs) and the fluorescence lifetime (FL) of 4 S 3/2 state, respectively. The results show that Ca 3 Y 2 Ge 3 O 12 : Er 3+ , Yb 3+ phosphor is excellent a material for optical temperature measurement.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Jinmeng Guo,Yang Shen,Liang Chen,Degang Deng,Shiqing Xu
The up-conversion (UC) La 2 MgGeO 6 : Er 3+ , Yb 3+ phosphors were prepared by a high-temperature solid-phase method. The structural phase and luminescence characteristics of the samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and photoluminescence spectra . The research systematically investigated a multi-mode optical thermometry based on fluorescence intensity ratios (FIR) of the thermal-coupled energy levels 2 H 11/2 / 4 S 3/2 , non-thermal-coupled energy levels 4 S 3/2 / 4 F 9/2 , and the fluorescence lifetime of the 4 S 3/2 state. Based on these methods, the maximum relative sensitivity reached 1.130%K −1 , 0.623%K −1 , and 2.914%K −1 , respectively. According to the results, the manufactured samples have remarkable temperature measuring performance, which is characterized by a broad temperature measurement range, high sensitivity, and superior stability.
研究领域:
材料科学
·
光学
·
测温学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Zhurong Mo,Shaoshan Su,Yanping Huo,Hongli Wen,Andrzej Suchocki,Deshmukh Abdul Hakeem
Fundamental understanding of the Stokes and anti-Stokes emissions in luminescence materials and their mechanism is very important for different technological applications. In this article, we report the dual mode, down/upconversion (DC/UC), luminescence in a LiAlSi 2 O 6 (β-spodumene) single host along with its mechanistic investigations. A series of emission tunable Li 1- x AlSi 2 O 6 : x Er 3+ (LAS: x Er 3+ ; 0 ≤ x ≤ 0.07) and Li 0.99- y AlSi 2 O 6 :0.01Er 3+ , y Yb 3+ (LAS:0.01Er 3+ ,yYb 3+ ; 0.001 ≤ y ≤ 0.007) phosphor powders were prepared by solid state reaction method at 1300 °C. The formation of single-phase phosphors is verified by XRD technique and other structural properties are investigated by FT-IR, UV-Vis-NIR spectra. The phosphors produced NIR DC emission at 1535 nm (under 380 and 980 nm excitation) and an intense red UC emission at 655 nm (under both 980 and 808 nm excitations). The dual mode emission intensity of the LAS:0.01Er 3+ is further improved by co-doping Yb 3+ ions via energy transfer from Yb 3+ to Er 3+ . The red UC emission intensity of LAS:0.01Er 3+ ,0.005Yb 3+ phosphor under 980 nm excitation is ~10 times stronger than the singly doped LAS:0.01Er 3+ phosphor. In addition, the phosphors can also be efficiently excited by 808 nm laser and hence can be used for biological application since 808 nm NIR irradiation exhibits higher light penetration depth without inducing overheating. The mechanism of energy transfer from Yb 3+ to Er 3+ by considering different emission pathways viz: ground state absorption (GSA), excited state absorption (ESA), energy transfer upconversion (ETU), back energy transfer (BET) and cross relaxation (CR) are discussed in detail. Based on the dual mode emissions, the LAS: x Er 3+ and LAS: x Er 3+ , y Yb 3+ ( x = 0.1 and 0.001 ≤ y ≤ 0.007) phosphors could be a potential candidate not only for the biological application as bio-probe but also as energy convertors for solid-state lighting, displays, and solar cell applications.
研究领域:
材料科学
·
光学
·
光子学
·
生物技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Caixia Song,Renguang Ye,Youjie Hua,Xuejiao Wang,Tianzhi Jiang,Juan Wang,Luping Lyu,Junhao Wu,Hongping Ma,Chenxia Li,Degang Deng,Shiqing Xu
In this study, three types of Er 3+ /Yb 3+ ion co-doped La 2 O 3 (LO), La 2 O 2 S (LOS), and La 2 O 2 SO 4 (LOSO) up-conversion phosphors with identical morphology and size were successfully synthesized using a homogeneous precipitation method combined with a sulfurization process. The research compares the up-conversion luminescence (UCL) properties of these three phosphors under 980 nm near-infrared excitation. It evaluates their optical temperature sensing performance based on the fluorescence intensity ratio (FIR), while also proposing their luminescence mechanisms. In addition, the phonon energy of the three matrices was determined using FT-IR and Raman spectroscopy, and the influence of the phonon energy on the sensitivity of the up-conversion (UC) non-contact thermometer was discussed. The results indicate that the UCL of the LOS system is the strongest among the three different matrix systems. Notably, when examining the thermosensitive behavior based on the thermally coupled levels (TCLs) ( 2 H 11/2 / 4 S 3/2 ), it was found that the maximum absolute sensitivity (S a-max ) of the three samples followed the trend: LOSO (0.00811 K -1 ) > LOS (0.00627 K -1 ) > LO (0.00607 K -1 ); this trend is consistent with the degree of matching (MD) between their phonon energies and energy gaps (ΔE). These findings provide valuable insights for selecting appropriate host materials with the desired thermometric capabilities and offer guidance for enhancing the thermometric performance of non-contact thermometers.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Mei-Hong Liu,Teng-Teng Li,Xiao Wang,Da-Yu Liu,Ning Yuan,De-Long Zhang,Yue Tian
Er 3+ /Yb 3+ -codoped CaIn 2 O 4 nano-fibers with good morphology were synthesized by electrospinning technique. X-ray diffraction was performed on the synthesized phosphor of nano-fibers to confirm that the CaIn 2 O 4 crystalline phase is dominant in it. The morphology of the nano-fibers was characterized by scanning electron microscopy. Optimal power supply voltage and thickener concentration for the synthesis were obtained. Er 3+ 980-nm-upconverted emission characteristics of the nano-fibers were investigated. The results show that two-photon process is the dominant mechanism for the upconversion emissions. The nano-fibers doped with 5 mol% Er 3+ display the strongest upconversion fluorescence. Temperature characteristics of the green 530 and 550 nm upconversion fluorescence of the nano-fibers were also studied for thermometry purposes. The results reveal that the nano-fibers show thermally stable spectral structure and the ones doped with 5 mol% Er 3+ display the highest thermal sensitivity of green fluorescence intensity ratio. We conclude that there exists an optimal Er 3+ concentration of 5 mol%, and the CaIn 2 O 4 nano-fibers doped with this optimal Er 3+ concentration display some spectroscopic properties favorable for ratiometric thermometry in the high-temperature regime.
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
·
2019
·
IF 2.961
Wei Xu,Yuwei Hu,Longjiang Zheng,Zhiguo Zhang,Wenwu Cao
Optical temperature sensors based on rare earth ions activated luminescent materials have presented their capabilities in thermal reading with good stability and high spatial resolution. The ongoing challenge is to improve the luminescence for further enhancing temperature measurement sensitivity and accuracy. Here, several Er 3+ -Yb 3+ codoped CaWO 4 phosphors are prepared and Cr 3+ ions are introduced, trying to modify the upconverion (UC) emissions from Er 3+ ions. Under the excitation of 980 nm laser, green UC luminescence from 2 H 11/2 and 4 S 3/2 states of Er 3+ is successfully strengthened with Cr 3+ codoping. Through the analysis of characterization by scanning electron microscopy, X-ray diffraction, Raman spectroscopy , and time-resolved spectroscopy, it is found that the dopant of Cr 3+ ions could affect the crystallinity and distort the crystal structure of the as-prepared samples. The thermometry behavior based on green emissions of Er 3+ is studied via fluorescence intensity ratio method. It is interesting to observe that the temperature sensing performance has also been influenced by the incorporation of Cr 3+ . When introducing 9 mol% Cr 3+ ions into Er 3+ -Yb 3+ codoped CaWO 4 phosphors, a maximum sensitivity of about 1.91% K −1 has been achieved. Combined with the intense green luminescence, CaWO 4 : Er 3+ -Yb 3+ -Cr 3+ would be a promising candidate for optical thermometry with excellent measurement sensitivity and accuracy.
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 AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Haoqiang Zhang,Hao Chen,Liang Xu,Yongjin Li,Zhiguo Song,Dacheng Zhou,Qi Wang,Zhangwen Long,Yong Yang,Yugeng Wen,Jin Han,Yuan Gao,Jianbei Qiu
Inorganic chiral materials have attracted increasing attention due to their application prospects. In this work, we synthesized the chiral nanostructured bismuth oxychloride co-doped with Er 3+ /Yb 3+ phosphor (D-BYEP) by hydrothermal growth with a subsequent air-annealing strategy using chiral sugar alcohols as the chiral inducer. The D-BYEP emitted bright red light under the excitation of 980 nm near-infrared laser. The temperature sensing behavior was evaluated by employing the thermally coupled (TCLs) or non-thermally coupled (NTCLs) levels of Er 3+ . The maximum relative sensitivities ( S R ) obtained are 0.84% K −1 and 1.30% K −1 (298 K), respectively. The results show that the D-BYEP may be ideal candidates for optical temperature sensors. We anticipate that this new type of inorganic chiral phosphor may have a range of applications in temperature measurement of light sources.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 12
·8191-8205
·
IF 3.5
Haozhang Liang,Xiangtao Lin,Nanshan Ma,Longqing He,Juxia Tong,Zhiwei Luo,Lingying Ye,Anxian Lu
The Er 3+ /Yb 3+ co-doped tellurite glasses and glass-ceramics (GCs) containing the Gd 2 Te 6 O 15 phase were successfully fabricated via the conventional melting-quenching technique followed by a crystallization regime. The Er 3+ /Yb 3+ co-doped tellurite glasses generated intense up-conversion green (524 and 546 nm) and red (658 nm) emissions when stimulated by a 980 nm laser. The up-conversion green emission intensity increased by 68 and 46 times with the increase of the Yb 3+ /Er 3+ ratio, and the optimal Yb 3+ /Er 3+ ratio was found to be 8:1. The surface crystallization process of the Gd 2 Te 6 O 15 GCs was confirmed through analysis of crystallization kinetics and microscopic morphology. The up-conversion luminescence and lifetime of Er 3+ ions were enhanced by the precipitation of low-phonon-energy Gd 2 Te 6 O 15 crystals. The GC sample crystallized at 480°C for 4 h showed the highest luminescence intensity. The optical thermometry properties of Er 3+ ions at thermally coupled energy levels ( 2 H 11/2 / 4 S 3/2 → 4 I 15/2 ) were explored. The Gd 2 Te 6 O 15 GCs co-doped with 0.25 mol% Er 2 O 3 and 2.0 mol% Yb 2 O 3 exhibited an excellent temperature relative sensitivity ( S r ) of 1.22% K −1 at 293 K and a great repeatability of 98.07%. These results suggest that the Er 3+ /Yb 3+ co-doped Gd 2 Te 6 O 15 GCs show promise for optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）