JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Baochen Wang,Shifeng Sun,Zeqi Li,Zongwang Li,Weiwei Lin,Chao Zeng,Yan-gai Liu,Ruiyu Mi
Rare earth co-doped phosphor for fluorescence intensity ratio (FIR) thermometer has gained increasing attention in recent years. Herein, the novel Tb 3+ and Eu 3+ co-doped K 3 SrBi(P 2 O 7 ) 2 (KSBP) phosphate phosphors were reported. The crystal structure of the title phosphor was determined using Rietveld refinement and proved to have a three-dimensional structure. The time-resolved spectroscopy reveals that there is almost no energy transfer between Tb 3+ and Eu 3+ . More importantly, Tb 3+ and Eu 3+ emissions show different thermal quenching behaviors, which claims the potential of this material for application in optical thermometer. The FIR of the typical KSBP:0.02Tb3+,0.04Eu3+ sample demonstrates a polynomial relationship as a function of temperature and the absolute and relative sensitivity are 0.025 K –1 and 0.59%/K, respectively. In general, our study reports a novel and potential KSBP:Tb 3+ ,Eu 3+ phosphate phosphor that is promising for use in high-sensitive FIR thermometers.
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
·
2025
·
IF 5.6
Yixi Lu,Bin Cao,Bin Li,Tingting Zhang,Hai Wu,Chaoyong Deng,Weichao Huang
To fulfill bifunctional applications of the optical thermometry and fingerprint detection, Sm 3+ -doped La 3 SnGa 5 O 14 phosphors were synthesized. Under 403 nm excitation, the phosphor showed strong orange-red emission with the peaks at 562, 599, 644, and 707 nm, originating from the 4 G 5/2 → 6 H n/2 (n = 5, 7, 9, and 11) transition of Sm 3+ . Interestingly, La 3 SnGa 5 O 14 : Sm 3+ had excellent thermal stability of the PL peak at 599 nm and anti-thermal quenching property of the PL peak at 562 nm. Leveraging this unique behavior, an optical thermometer based on the fluorescence intensity ratio (FIR) was designed and had a maximum relative sensitivity (S r ) of 0.2348 % K −1 at 423 K. Furthermore, the fluorescent latent fingerprints images prepared with La 3 SnGa 5 O 14 : Sm 3+ phosphor were well visualized, and the level 1–3 features could be identified under ultraviolet irradiation. These findings suggest that the La 3 SnGa 5 O 14 : Sm 3+ phosphor has potential applications in optical thermometry and fingerprint detection.
研究领域:
材料科学
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光学物理
·
分析化学
·
法庭科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Han Xia,Lei Lei,Jienan Xia,Youjie Hua,Degang Deng,Shiqing Xu
Non-contact optical thermometry based on fluorescence intensity ratio (FIR) technique has been widely researched over the past few decades. However, the reported systems exhibit two important shortcomings including the existence of a few interferential signals in addition to the required spectral bands for FIR and the absence of internal standard for reference signal. Herein, only two emission bands of Er 3+ : 4 F 9/2 → 4 I 15/2 (~673 nm) and Tm 3+ : 3 H 4 → 3 H 6 (~800 nm) are achieved in Yb/Er/Tm tri-doped Na 3 ZrF 7 nano-system. Moreover, the upconversion (UC) emission intensity of Er 3+ keeps unchanged with the rising of temperature, which is applied as reference signal; while that of Tm 3+ enhances evidently, which is applied as temperature signal. The calculated maximum absolute temperature sensitivity (S a ) and relative temperature sensitivity (S r ) are 0.17 K −1 at 393 K and 1.76% K −1 at 313 K, respectively.
研究领域:
材料科学
·
纳米技术
·
光学
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 34
·6001-6008
·
IF 3.756
Heyan Wu,Yunhao Liang,Yue Ma,Jun Yang,Shanshan Hu
This work begins with a study of the synthesis of multi-color luminescence phosphors, which is followed by a discussion of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+. Uniform and approximately spherical particles of AgBi(MoO4)2-based phosphors were prepared by a simple one-step hydrothermal method without adding any surfactant. We obtained a series of rich green, yellow, blue, and white luminescence phosphors by doping Ln3+ (Ln3+ = Yb3+, Er3+, Ho3+, Tm3+) into the AgBi(MoO4)2 matrix, and an analysis of various correlative factors was made, especially for the amounts of doping ions. Furthermore, the investigation of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+ revealed that the fluorescence intensity becomes lower with increasing temperature from 323 to 573 K. The fluorescence intensity ratio (FIR) of the two thermal coupling energy levels (2H11/2, 4S3/2) of Er3+ was calculated, and the absolute sensitivity of the obtained phosphor reached a maximum value of 1.32% K−1 at 463 K, as obtained by fitting the FIR as a function of temperature, which is a relatively high level compared with other related materials. This material is expected to be used as a highly sensitive FIR thermometer.
研究领域:
材料科学
·
光学
·
发光材料
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 49
·2305359
·
IF 19
Ke Su,Lefu Mei,Qingfeng Guo,Pengfei Shuai,Yujia Wang,Yukun Liu,Yang Jin,Zhijian Peng,Bo Zou,Libing Liao
Optical manometry is a highly promising method for measuring pressure. However, its wider application is limited by the lower sensitivity and influenced by environmental factors. Herein, multi-mode optical pressure sensors based on Eu 2+ -doped Li 4 SrCa(SiO 4 ) 2 phosphors suitable for a variety of complex pressure-measuring environments are designed. The phosphors contain two separate luminescence centers at 443 nm (Eu Sr ) and 584 nm (Eu Ca ), respectively. In the lower pressure range, the emission peak undergoes a massive redshift of 5.19 nm GPa −1 of Eu Ca , which is 14× better than commercially available ruby sensors. In order to improve the pressure response range and the accuracy of pressure measurement, for the first time, a new approach in the pressure readout method in which single Eu 2+ ions doping based on fluorescence intensity ratio (FIR) pressure measurement is realized in designed materials. Meanwhile, the measured full width at half maximum (FWHM) as an indicator of pressure sensor performance also reveals that the sensing performance is d FWHM /d P ≈ 1.23 nm GPa −1 and d FWHM /d P ≈ 0.84 nm GPa −1 for Eu Sr and Eu Ca positions, respectively. Additionally, the structural stability of the phosphor is confirmed by in situ Raman spectrum. The above results indicate that the Li 4 SrCa(SiO 4 ) 2 :0.04Eu 2+ phosphor is a good candidate for multi-mode optical pressure sensors.
研究领域:
光学传感
·
材料科学
·
压力测量
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发光材料
·
固态物理
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Youfa Tai,Ruirui Cui,Jun Zhang,Chunkai Wang,Tingyu Zhao,Beiqiao Zhang,Chaoyong Deng
Novel orange-red Sr 2 GdSbO 6 : x Eu 3+ ( x = 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6) phosphors were successfully prepared by the traditional high-temperature solid-state method. The results of Rietveld refinement, energy dispersive spectroscopy (EDS) spectrum and elemental mapping demonstrate that Eu 3+ successfully replaces the Gd 3+ sites and distributes uniformly in the particles of phosphors. The luminescence properties of Sr 2 GdSbO 6 :Eu 3+ phosphors were investigated in detail. The emission spectra of the strongest emission peak is the 5 D 0 → 7 F 1 (593 nm) transition, which can emit orange-red light under 393 nm excitation. When the doping concentration of Eu 3+ ions is x = 0.2, the luminescence intensity of the phosphors reaches the highest. The detailed mechanism of concentration quenching is attributed to dipole-dipole interaction. The thermal stability values of Sr 2 GdSbO 6 :0.2Eu 3+ phosphors are 87%, 82% and 114% under 393, 467 and 527 nm excitations, respectively. The causes of the abnormal thermal quenching under 527 nm excitation were analyzed. Based on the abnormal thermal quenching under 527 nm excitation, the optical thermometry properties of Sr 2 GdSbO 6 :0.2Eu 3+ phosphors were investigated by fluorescence intensity ratio (FIR) technique, and appreciable relative sensitivity was obtained. The results suggest that Sr 2 GdSbO 6 :0.2Eu 3+ phosphors can be potentially applied to w-LEDs and optical thermometers.
研究领域:
材料科学
·
光学
·
磷光材料
·
发光材料
·
光学传感
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianzhi Jiang,Xuejiao Wang,Renguang Ye,Youjie Hua,Xinfeng Jin,Weigang Guo,Guoqing Liu,Zhiqiang Long,Buqing Zhang,Gongxun Bai,Junjie Zhang,Shiqing Xu
The quenching of luminescence in Er 3+ /Yb 3+ co-doped with Tm 3+ presents a dilemma as it substantially diminishes thermometric performance. In this study, Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ phosphors were synthesized using a homogeneous precipitation method combined with a sulfurization process. In addition, three sets of fluorescence intensity ratio (FIR) models were designed, which have self-calibration function. The effects of incorporation of Li + or Li + /Ba 2+ on the up-conversion luminescence (UCL) intensity and thermometric performance of the phosphors were systematically studied. The results show that the introduction of Li + or Li + /Ba 2+ co-doping leads to lattice distortion and the formation of oxygen ion vacancies in the lattice, which further accelerates the energy transfer process and mixes the charge transfer states , and ultimately dramatically improves the UCL and thermometric performance. The introduction of Li + and Li + /Ba 2+ co-doping enhanced the UCL of the materials by about 3.7 times and 5.6 times compared to Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ . When based on nonthermally coupled levels (NTCLs), the S r-max of Li + /Ba 2+ co-doped sample is 0.080 K −1 at 573 K, which is 87 % higher than that based on TCLs. These findings not only provide a new avenue for improving the UCL and thermometric performance but also provide an accurate self-calibration FIR model over a wide temperature range.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1263-1274
·
IF 8.8
Guo Yue,Qin Lin-Jun,Xu Jing,Jiang Xiao-Ping,Yue Xiao-Yu,Hou Yi,Shi Hao,Wang Li-Xi,Zhang Qi-Tu
Optical temperature sensing based on the fluorescence intensity ratio (FIR) of red emission for lanthanide ions holds significant relevance in non-contact temperature measurement for biological application. In this study, the perovskite-structured KZnF 3 is utilized as a host material for Er 3+ to achieve a high-purity upconversion (UC) red emission. The observed Stark splitting of the red emission peak provides evidence of the energy level splitting of Er 3+ . Group theory is employed to decompose the spectral branching of Er 3+ under the point group symmetry of KZnF 3 , allowing for the derivation of Stark splitting energy levels induced by the crystal field effect. The optical temperature-sensing behavior of the red UC luminescence was investigated, specifically examining the FIR of the splitting sub-peaks, which exhibited an exponential relationship with temperature. The KZnF 3 : Yb 3+ , Er 3+ demonstrated a relative sensitivity ( S r ) of 0.00182%·K −1 at 298 K, highlighting its excellent response to temperature. Ex vivo bio-thermometry experiments conducted on chicken breast validated the material's ability to penetrate biological tissues and showed its significant sensitivity of the FIR to temperature. These results establish KZnF 3 :Yb 3+ , Er 3+ as a promising material for optical thermometry in various biological applications. Graphic abstract
研究领域:
光学传感
·
材料科学
·
发光测温学
·
生物光子学
·
固态物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）