JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Linghui Shen,Tong Wei,Yongchao Shi,Hanyu Hao,Si Chen,Jiaguang Chen,Hao Guan,Qingjun Zhou,Zepeng Li
The various applications of luminescence materials were generally based on the effective modulation of luminescence spectra. However, the research on reversible spectral regulation of up-conversion (UC) luminescence materials was still in its infancy stage. In this work, a class of smart phosphor, Er 3+ and Yb 3+ -codoped SrBi 8 Ti 7 O 27 (SBYT: xEr 3+ ) intergrowth bismuth layer-structured ferroelectric , possessing fast sensitivity to visible light irradiation, was reported based on visible light driven photochromic effect. Through the alternate stimuli of light irradiation and heating treatment, the reversible regulation of UC luminescence was achieved accompanying with the switching of coloration and decoloration processes. The luminescence modulation degree tightly relied on the irradiation time and thermal treatment modes. The reversibility and stability properties were also revealed. Moreover, it is found that polarization treatment was an effective approach which can be adopted to improve the UC luminescence contrast. The maximum luminescence modulation ability of SBYT: xEr 3+ reached up to 81.3% which was 131% of that un-polarized sample. It is believed that SBYT: xEr 3+ ceramics can act as a promising candidate for optical data storage and anti-counterfeiting applications.
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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhenlong Cheng,Mingzhou Meng,Xin Qiao,Yuanli Liu,Ute Resch-Genger,Jun Ou
Optical Thermometry is popular among researchers because of its non-contact, high sensitivity, and fast measurement properties. In the present experiment, Er 3+ /Yb 3+ /K + co-doped NaYF 4 nanoparticles with different K + concentrations were synthesized by solvothermal method , and the samples showed bright upconversion green emission under the excitation of a 980 nm laser. The powder X-ray diffractometer and transmission electron microscope were used to characterize the crystal structure and its surface morphology , respectively. The spectral characteristics of nanoparticles with K + doping concentration from 10% to 30% (Molar ratio) were investigated by fluorescence spectroscopy , and it was observed that the fluorescence intensity reached the maximum at the K + concentration of 20%, after which the intensity weakened when the K + content continued to increase. According to the dependence between the luminescence intensity of the sample and the laser power density and fluorescence lifetime , the intrinsic mechanism was carefully investigated. Temperature-dependent spectra of the samples were recorded in the temperature range of 315–495 K， and the maximum values of absolute sensitivity (S a ) and relative sensitivity (S r ) were measured at 0.0041 K −1 (455 K) and 0.9220%K −1 (315 K). The experimental results show that K + /Er 3+ /Yb 3+ triple-doped NaYF 4 green fluorescent nanoparticles (GFNs) have good prospects for applications in display devices, temperature sensing, and other fields.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xutong Wang,Shuyang Chen,Shiqing Xu,Liang Chen
For the first time, a straightforward optical fiber temperature sensing system based on La 2 MoO 6 :Er 3+ , Yb 3+ phosphors is proposed. The La 2 MoO 6 : Er 3+ , Yb 3+ phosphors were synthesized successfully using the molten salt method. A dual-mode temperature measurement technique based on the fluorescence intensity ratio (FIR) is introduced. The thermally coupled energy levels ( 2 H 11/2 and 4 S 3/2 ) and non-thermally coupled levels ( 2 H 11/2 and 4 F 9/2 ) exhibit maximum relative sensitivities of 1.24 % K −1 and 0.79 % K −1 at 293 K, respectively. The temperature resolution achieved was below 0.5 K. By utilizing the phosphor and optical fiber temperature sensor , real-time and accurate temperature monitoring was achieved, with a temperature deviation of less than 0.5 K. The optical fiber temperature sensor system provides exceptional reversibility and stability, while also playing a crucial role in precise remote temperature measurements under challenging conditions.
研究领域:
材料科学
·
光学工程
·
生物医学传感
·
纳米医学
·
分子影像
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xingzhen Huang,Kan Huang,Liken Chen,Nan Chen,Ruoshan Lei,Shilong Zhao,Shiqing Xu
The Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ phosphors co-doped with Li + and Li + /Mg 2+ ions were prepared via solid state reaction method. The effects of Li + and Mg 2+ co-doping on the structure and morphology of Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ phosphors were investigated by X-ray diffraction (XRD), electron paramagnetic resonance (EPR) spectra and field emission scanning electron microscopy (FESEM) observations. The 980 nm excitation assisted UC luminescence intensity for green and red band was enhanced by 8.7 and 14.3 times respectively after co-doping with Li + /Mg 2+ ions in Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ , which could be explained based on the variations in crystal structure and particle size. Using the fluorescence intensity ratio (FIR) technique, the impact of 980 nm pump power on the thermometric behaviors was studied based on the thermally coupled levels of 2 H 11/2 and 4 S 3/2 of Er 3+ ions. Due to the unique thermal properties of the Y 2 Ti 2 O 7 host, the temperature increment caused by laser thermal effect was minimized, benefiting the consistency of FIR data over a wide range of pump power density. Besides, a high relative sensor sensitivity of 1.17%K −1 was obtained for Y 2 Ti 2 O 7 : Er 3+ /Yb 3+ /Li + /Mg 2+ phosphors. These characteristics may make the studied system applicable for optical temperature sensor with high 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 OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2022
·Vol. 39
·期 10
·2625-2636
·
IF 2.058
Hang Liu,Xingke Zheng,Pengcheng Wang,Haiyan Wang,Yuhong Zhang
In this work, a comparative study of the upconversion (UC) luminescence properties of ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, and Ca) scheelite phosphors and ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}} $-co-doped ${{\rm MgWO}_4}$ wolframite phosphors is reported. Under 980 nm excitation, all the samples emit green and red emissions. The ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-doped ${{\rm MgWO}_4}$ phosphor has a higher UC emission intensity. Furthermore, the optical temperature sensing properties in ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, Ca, and Mg) phosphor samples are investigated. The relative sensitivity (${{\rm S}_r}$) based on thermally coupled levels (TCLs) increases gradually with an increase in matrix phonon energy. The absolute sensitivity (${{\rm S}_a}$) values of the samples are accurately predicted by the chemical bonding parameter (${{\rm f}_c}$). The results of the correlation between the UC luminescence properties and the microscopic crystal structure, and the relationship of the temperature sensitivity and the host parameters, provide us with a guiding insight for the selection of a host material with ideal temperature measurement capability.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Wenlan Wang,Qingkun Shang,Wei Zheng,Hui Yu,Xuejiao Feng,Zhidan Wang,Yabin Zhang,Guoqiang Li
A novel near-infrared antibacterial material, Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder, was synthesized and applied to kill Aeromonas hydrophia with a maximal bactericidal rate of 65% in 90 min under 980 nm laser irradiation. However, Fe3+-TiO2 or Er3+-Yb3+-TiO2 nanopowders obtained under the same conditions barely could kill Aeromonas hydrophia. The initial energy applied in the photocatalysis antibacterial process is supplied by the upconversion emission of Er3+ and Yb3+ and the codoping of Fe3+, which has intensified the light absorption intensity and enlarged the absorption range. The analyses of phase structure and the optical properties including XRD, UV−vis diffuse reflectance spectra, and upconversion photoluminescence spectra of Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder have been performed in detail to reveal the complex energy transfer and change mechanism. According to our experimental results, the mechanism has been demonstrated involving the upconversion emission, multistep excitation by means of intermediate energy level, capture and transfer electrons of Fe3+, and so on. The photocatalystic antibacterial function of Er3+-Yb3+-Fe3+-TiO2 under near-infrared instead of ultraviolet light is also reported. Because of the strong penetrability of near-infrared, this kind of material may be used in photodynamic therapy (PDT) to kill bacteria or tumors directly.
研究领域:
材料科学
·
生物学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Xinyue Li,Xiaoke Wang,Yongwang Cao,Lizhi Xu,Long Han,Yi Ma,Wei Lv,Zhipeng Li
The Lu 2 O 2 S exhibits exceptional properties in terms of its high density, chemical stability, and optical inertia as a luminescent matrix material , however, the preparation process poses significant challenges. Herein, solid phase synthesis was improved to prepare Lu 2 O 2 S: Er 3+ /Yb 3+ phosphors with high crystallinity and homogenous particle size without agglomeration. The phosphor continuously emits bright green light under the excitation of a near-infrared 980 nm laser, which is not affected by the laser power, doping concentration and temperature. The optical thermal sensing performance of the phosphor using LIR (Luminescence intensity ratio) method was carried out, the Sr (relative sensitivity of temperature) is rather high with reaching a maximal value of 0.99 % K −1 at 363 K, indicating Lu 2 O 2 S:Er 3+ /Yb 3+ up-conversion phosphor has good temperature sensing behavior. Furthermore, through spectral overlap and luminescence decay lifetime, the energy transfer mechanism was inferred to be a quadrupole-quadrupole interaction. This work suggests that Lu 2 O 2 S:Er 3+ /Yb 3+ phosphor could be a candidate for non-contact nanothermometers, anti-counterfeit and biological imaging.
研究领域:
材料科学
·
光学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 14
·2402225
·
IF 10
Qian Zhu,Yongsheng Sun,Yuzhen Wang,Zhiguo Xia
Flexible temperature sensors are crucial for monitoring physiological parameters in smart human wearable devices, however, there is a challenge to realize reproducible, sensitive, real-time, and in-situ temperature sensing simultaneously. Herein, Er 3+ /Yb 3+ co-doped Li 2 HfO 3 phosphor thermometries have been designed and prepared, which demonstrate bright upconversion luminescence and precise temperature sensing capabilities. The temperature sensing characteristics of thermally coupled energy states in Li 2 HfO 3 :Er 3+ , Yb 3+ are explored based on the fluorescence intensity ratio technique, with a maximum relative sensitivity of 0.875% K −1 and a temperature uncertainty of 0.017 K at 300 K. In addition, flexible composite fluorescent optical fiber temperature sensors have been fabricated, and the fiber with a double-cladding structure is employed to monitor human body temperature and airflow heat with satisfying performances. This work not only provides a promising rare earth phosphor thermometry but also opens a new avenue for the development of flexible optical fiber temperature sensors for health management.
研究领域:
生物医学工程
·
光学传感
·
体温调节
·
可穿戴设备
·
分子诊断
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Tianzhi Jiang,Renguang Ye,Xinfeng Jin,Weigang Guo,Xiaoqing Liu,Shilong Zhao,Junjie Zhang,Shiqing Xu
Realization and optimization of enhanced/tunable optical luminescence properties is highly demanded for reliable and accurate temperature sensing. In this work, uniform monodisperse spherical Er 3+ /Yb 3+ co-doped Y 2 O 3 microcrystals of four different sizes have been synthesized via homogeneous precipitation by changing the reaction time, and the tuning of luminescence intensity/color was achieved by the controllable particles size. On this basis, by studying the particle size dependence of temperature sensing performance, we found that the behavior of absolute sensitivity ( S a ) and relative sensitivity ( S r ) have highly size dependence. Interestingly, when different FIR strategies were used (thermally coupled levels (TCLs) and nonthermally coupled levels (non-TCLs)), the sensitivity exhibits the opposite behavior. Importantly, when using the non-TCLs strategy, the maximum S a value for the smallest phosphors was 1.084 K -1 , leading to ∼246 times improvement compared to TCLs-based S a . The ultrahigh S a indicated that the Er 3+ /Yb 3+ co-doped Y 2 O 3 phosphors have potential in temperature detection, and the results are of guiding significance to studying the sensitivity of Y 2 O 3 particle size-dependent temperature measurement.
研究领域:
材料科学
·
光学
·
纳米技术
·
温度传感
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-12
·
IF 4.259
Zhang Yanqiu,Chen Baojiu,Xu Sai,Li Xiangping,Zhang Jinsu,Sun Jiashi,Zheng Hui,Tong Lili,Sui Guozhu,Zhong Hua,Xia Haiping,Hua Ruinian
To realize photothermal therapy (PTT) of cancer/tumor both the photothermal conversion and temperature detection are required. Usually, the temperature detection in PTT needs complicated instruments, and the therapy process is out of temperature control in the present investigations. In this work, we attempt to develop a novel material for achieving both the photothermal conversion and temperature sensing and control at the same time. To this end, a core-shell structure with NaYF 4 :Er 3+ /Yb 3+ core for temperature detection and NaYF 4 :Tm 3+ /Yb 3+ shell for photothermal conversion was designed and prepared. The crystal structure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Furthermore, the temperature sensing properties for the NaYF 4 :Er 3+ /Yb 3+ and core-shell NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ nanoparticles were studied. It was found that the temperature sensing performance of the core-shell nanoparticles did not become worse due to coating of NaYF 4 :Tm 3+ /Yb 3+ shell. The photothermal conversion behaviors were examined in cyclohexane solution based on the temperature response, the NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ core-shell nanoparticles exhibited more effective photothermal conversion than that of NaYF 4 :Er 3+ /Yb 3+ nanoparticles, and a net temperature increment of about 7 °C was achieved by using the core-shell nanoparticles.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
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
OPTICAL MATERIALS
·
2011
·
IF 1.679
Hui Hu,Yan Bai,Minwen Huang,Biyin Qin,Jie Liu,Wenjie Zheng
Different crystal structure of TeO 2 nanoparticles were used as the host materials to prepare the Er 3+ /Yb 3+ ions co-doped upconversion luminescent materials. The TeO 2 nanoparticles mainly kept the original morphology and phase after having been co-doped the Er 3+ /Yb 3+ ions. All the as-prepared TeO 2 :Er 3+ /Yb 3+ nanoparticles showed the green emissions (525 nm, 545 nm) and red emission (667 nm) under 980 nm excitation. The green emissions at 525 nm, 545 nm and red emission at 667 nm were attributed to the 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of the Er 3+ ions, respectively. For the α-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles, three-photon process involved in the green ( 2 H 11/2 → 4 I 15/2 ) emission, while two-photon process involved in the green ( 4 S 3/2 → 4 I 15/2 ) and red ( 4 F 9/2 → 4 I 15/2 ) emissions. For the β-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles, two-photon process involved in the green ( 2 H 11/2 → 4 I 15/2 ), green ( 4 S 3/2 → 4 I 15/2 ) and red ( 4 F 9/2 → 4 I 15/2 ) emissions. It suggested that the crystal structure of TeO 2 nanoparticles had an effect on transition processes of the Er 3+ /Yb 3+ ions. The emission intensities of the α-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles and β-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles were much stronger than those of the (α + β)-TeO 2 :Er 3+ /Yb 3+ (3/10 mol%) nanoparticles.
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）