JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Xuekai Wang,Yongze Cao,Xianglan Yan,Guojian Li,Xiangping Li,Jinshu Zhang,Baojiu Chen
Hexagonal Er 3+ /Yb 3+ co-doped LaZrTa 3 O 11 (LZTO) phosphor was prepared by molten salt synthesis with B 2 O 3 flux. Holding temperature, holding time, solute and solvent ratio were regulated. The green upconversion luminescence (UCL) integral intensity of the optimal sample can reach 29.2% of β-NaYF 4 :Er 3+ /Yb 3+ under 980 nm laser excitation. This outstanding pure green UCL is due to the low phonon energy, Er 3+ /Yb 3+ monolayer (2D) distribution, asymmetry of Er 3+ /Yb 3+ doped lattice sites, and low oxygen vacancy. The maximum relative temperature sensitivity attains 0.01221 K −1 at 303 K by employing luminescence intensity ratio (LIR) technique. LZTO:Er 3+ /Yb 3+ phosphor can be used in temperature sensing.
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
·
2024
·
IF 5.1
Yun He,Zexiong Wang,Ruoshan Lei,Shilong Zhao,Shiqing Xu
Although rare-earth (RE 3+ )-doped negative thermal expansion (NTE) luminescent materials exhibit promising anti-thermal quenching effects, limited progress has been made in modifying their NTE and luminescence performances. This study investigates the impacts of Mo 6+ ion stoichiometry on the crystal structure, NTE behavior, and photoluminescence (PL) thermal response characteristics in Er 3+ , Yb 3+ co-doped Sc 2 Mo 3(1+x) O 12 phosphors (−0.1 ≤ x ≤ 0.1). The results reveal that augmenting the Mo 6+ content results in a transition from three-dimensional to two-dimensional NTE behavior in the host material due to the change in steric hindrance. This transition modulates cross-relaxation and back energy transfer processes between the doped Er 3+ and Yb 3+ ions. Consequently, the thermal enhancement factor for the upconversion luminescence of Er 3+ ions decreases with increasing Mo 6+ content, whereas the factor for near-infrared downshifting luminescence increases. Additionally, using the luminescence intensity ratio between the 1550 nm emission of Er 3+ and the 1050 nm emission of Yb 3+ for temperature sensing, a maximum relative sensitivity of 3.97 % K −1 is achieved in Sc 2 Mo 3.21 O 12 : Er 3+ , Yb 3+ . These findings provide insights into the synchronous regulation of the NTE and luminescence properties of RE 3+ -doped NTE phosphors for versatile applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2024
·
IF 2.6
Ting Liu,Zhipeng Lin,Changfei Lai,Wei Guo,Shouyu Wang
To enhance the sensitivity of polydimethylsiloxane (PDMS)-based optical fiber surface plasmon resonance (SPR) temperature sensing probes, we propose a new prototype with a PDMS@Au sensing layer on the gold (Au) film of the multi-mode fiber (MMF)-single-mode fiber (SMF)-MMF heterojunction structure. This designed probe has improved the temperature sensitivity from −1.26 nm/°C (Au-PDMS) to −2.14 nm/°C (Au-PDMS@Au), maintaining good repeatability and stability. Moreover, the probe can be fabricated with simple procedures at a low cost. Therefore, this probe is a promising tool for temperature sensing in various applications.
研究领域:
光学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 20
·3432-3438
·
IF 3.117
Pengpeng Lei,Ran An,Chengyu Li,Jing Feng,Hongjie Zhang
Bismuth-based nanoparticles, particularly NaBiF4, have attracted extensive attention as hosts for lanthanides (Ln3+) ions and other luminescent ions in recent years. However, the controllable synthesis of NaBiF4 nanoparticles remains a challenge. Herein, different concentrations of Gd3+ ion-doped NaBiF4:Yb3+/Er3+ upconversion nanoparticles (UCNPs) have been successfully synthesized via a facile solvothermal method. By changing the doping levels of Gd3+ ions (0–20%), the size of NaBiF4:Yb3+/Er3+ UCNPs can be easily tuned from 200 nm to 50 nm, but the nanoparticles always maintained the hexagonal phase structure. Under 980 nm excitation, the as-synthesized NaBiF4:Yb3+/Er3+/20%Gd3+ UCNPs showed desirable luminescent properties. Furthermore, the 980 nm excited luminescence temperature-sensing behavior of NaBiF4:Yb3+/Er3+/20%Gd3+ UCNPs was achieved in a wide temperature range from 148 K to 498 K. These results provide strong evidence for the controllable synthesis of NaBiF4 UCNPs and their application in ratiometric temperature sensing.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Haoyue Hao,MengYao Zhu,Liang Li
In this paper, Er3+/Yb3+ codoped Y2(1–x%)Lu2x %O3 solid solution was prepared through the sol–gel method, and the substitution of Y3+ by Lu3+ ions in Y2O3 was confirmed by X-ray diffraction data. The up-conversion emissions of samples under 980 nm excitation and the relative up-conversion processes are investigated. The emission shapes do not vary with the change in doping concentration due to the unaltered cubic phase. The red-to-green ratio changes from 2.7 to 7.8 and then declines to 4.4 as the doping concentration of Lu3+ increases from 0 to 100. The emission lifetimes of green and red have similar variation: the emission lifetime decreases with doping concentration changing from 0 to 60 and rises as the doping concentration continues to increase. The reason why the emission ratio and lifetime change could be originated to the exacerbation of cross-relaxing process and the change of radiative transition probabilities. The temperature-dependent fluorescence intensity ratio (FIR) shows that all samples can be used in noncontact optical temperature sensing, and the method of local structure distortion can be used to improve sensitivity further. The max sensing sensitivities of FIR based on R538/563 and Rred/green reach 0.011 K–1 (483 K) and 0.21 K–1 (300 K). The results display that Er3+/Yb3+ codoped Y2(1–x %)Lu2x %O3 solid solution can be potential candidates for optical temperature sensing in different temperature ranges.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yunfeng Bai,Yan Yang,Yawen Deng,Suihu Dang,Zelong He,Ziwen Zhou,Lu Liu
Rare-earth-ion-doped nanocrystals have low quantum conversion efficiency due to their high surface-to-volume ratios and many surface defects, which induce fluorescence quenching. We propose a laser annealing strategy that uses a 974.5 nm laser with a high power density to heat Er3+-doped Y2O3 nanocrystals for several seconds. As a result, the upconversion of Er3+-doped Y2O3 nanocrystals is enhanced obviously after laser annealing: the green emission is enhanced by 90 times and red emission by 24 times. The main reason for the upconversion enhancement is the ultrahigh temperature caused by laser annealing, which increases the grain size and reduces the surface defects. It is an encouraging result, and laser annealing is suitable for various rare-earth-ion-doped oxide nanoparticles. Then, the strong upconversion is applied to measure temperature. After laser annealing, the highly improved fluorescence efficiency decreases the required excitation power density. The thermal effect of excitation light is negligible when the excitation power density is less than 0.13 W/mm2. The thermally coupled levels of I538/I563 and nonthermally coupled levels of I661/I800 are studied for thermometry. The experimental results show that I661/I800 has high absolute sensitivity than I538/I563 at a temperature below 400 K. Rate equations and multiphonon transitions are applied to explain the relationship between the nonthermally coupled fluorescence intensity ratio and temperature. It is instructive for the design of new temperature sensors.
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
·
2021
·
IF 3.599
Hong-Gang Ye,Xuan Lu,Rui Cheng,Jiazhuang Guo,He Li,Cai-Feng Wang,Su Chen
Bottom-up methods allowing the preparation of carbon dots (CDs) with favorable attributes are highly desirable. Herein, we report the mild bottom-up synthesis of CDs towards temperature sensing. Five kinds of CDs with blue or green fluorescence were synthesized in water or tetrahydrofuran (THF) under moderate conditions (normal pressure, 50~95 °C), with use of carbonyl compounds as carbon sources, such as acetylacetone (AA), cyclohexanone (CH), 2-hydroxy-2-methylpropiophenone (HM), glutaric dialdehyde (GD), and salicylaldehyde (SA). Typically, with use of acetylacetone (AA) as carbon sources, CDs were synthesized at 95 °C in water in the presence of zinc chloride and 1, 2-dichloroethane. The synthesis, characterizations, and optical properties of AA-derived CDs were thoroughly investigated. The resultant CDs exhibit green photoluminescence (PL) at 520 nm with absolute PL quantum yield (QY) of 21%. Moreover, the PL intensity proportionally depends on temperature in the range 150–360 K, which makes AA-derived CDs potentially useful for temperature sensing.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2023
·Vol. 31
·期 5
·9123-9134
·
IF 3.8
Hanyu Xu,Zuoling Fu,Yanling Wei
The susceptibility of Cs-based fluorides to deliquescence has led to the fact that lanthanide-doped Cs-based fluorides and their related applications have hardly been reported. Herein, the method to solve the deliquescence of Cs3ErF6 and its excellent temperature measurement performance were discussed in this work. Initially, the soaking experiment of Cs3ErF6 found that water had irreversible damage to the crystallinity of Cs3ErF6. Subsequently, the luminescent intensity was ensured by the successful isolation of Cs3ErF6 from the deliquescence of vapor by the silicon rubber sheet encapsulation at room temperature. In addition, we also removed moisture by heating samples to obtain temperature-dependent spectra. According to spectral results, two luminescent intensity ratio (LIR) temperature sensing modes were designed. The LIR mode which can quickly respond to temperature parameters by monitoring single band Stark level emission named as “rapid mode”. The maximum sensitivity of 7.362%K-1 can be obtained in another “ultra-sensitive mode” thermometer based on the non-thermal coupling energy levels. This work will focus on the deliquescence effect of Cs3ErF6 and the feasibility of silicone rubber encapsulation. At the same time, a dual-mode LIR thermometer is designed for different situations.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hang Liu,Ziyi Zhang,Jian Liu,Kailin Wang,Yuhong Zhang
In this paper, the upconversion(UC) and downshifting(DS) luminescence and thermal sensing performances of the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated in detail. The bright UC emission bands from 450 to 900 nm and the DS luminescence bands from 1000 to 1700 nm are obtained under 980 nm excitation. The typical near infrared(NIR) emisson band(∼1550 nm) of Er 3+ ions and the NIR emission band(∼1200 nm) of Ho 3+ ions are gained. The temperature sensing features of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated with the luminescence intensity ratio (LIR) technique. The results indicate that the maximum relative sensitivity (S Rmax ) of CaIn 2 O 4: Er 3+ /Tm 3+ /Yb 3+ sample reaches 1.576% K -1 at 313 K, and the S Rmax of CaIn 2 O 4: Ho 3+ /Tm 3+ /Yb 3+ sample reaches 0.797% K -1 at 353 K in UC range. In addition, the higher temperature measuring sensitivities have been obtained in NIR-II region with the DS luminescence of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors. The above results indicate that the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors show bright emission bands in visible and NIR-II, and higher sensitivity for temperature measurement. The CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors present great application in optical 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
SENSORS AND ACTUATORS A-PHYSICAL
·
2023
·
IF 4.6
Jing Li,Hai Nie,Guoyun Zhou,Yan Hong,Wei Meng,Yongkang Zhu,Qinghua Huang
Flexible, biocompatible temperature sensors are of great importance for future developments in wearable electronic skin. Herein, a high resolution, fast response, biocompatible negative temperature coefficient (NTC) temperature sensor comprised of poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) and phthalocyanine copper (CuPc) is developed. The addition of CuPc with high electron mobility to PEDOT: PSS increases the effective electron transition under the action of thermal energy , and thus its thermoelectric performance of the material is improved. The packaged sensor can monitor temperature changes in the range of 20 °C to 80 °C in real time with high sensitivity (0.1940% °C −1 ), linearity (R 2 =0.994) and accuracy (0.1 °C). When the ambient temperature of the sensor changes from 25 °C to 50 °C, the response and recovery time of the sensor are ∼ 1 s. The performance of the sensor has not decreased significantly after 4 weeks of continuous operation, which validates the high reliability of the sensor in the extended working time. Furthermore, the comparison between the PEDOT: PSS/CuPc sensor and commercial infrared thermal imager on different parts of the human body temperature measurement shows that the PEDOT: PSS/CuPc sensor is applicable in electronic skin, medical detection and other fields.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 6
·2575-2590
·
IF 4
Yuhong Zhang,Wentong Cai,Jian Liu,Ziyi Zhang,Bo Sun,Hang Liu
Herein, a series of Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors is prepared via a solid-state reaction. The upconversion and downshift luminescence properties of the phosphors were investigated under an excitation of 980 nm. The bright blue light emission from Tm3+ ion and the green and red light emissions from Ho3+(Er3+) ions were observed. The near-infrared light intensity of NIR-I (Tm3+, ∼850 nm), NIR-II (Er3+: ∼1550 nm; Tm3+: ∼1783 nm) and NIR-III (Ho3+: ∼2050 nm) were analyzed. In particular, the dramatic thermal enhancement phenomenon in visible and NIR regions was exhibited by the Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors. Among them, the green light intensity of Er3+ ions increased 26.77 times, from 303 to 573 K. The NIR-II emission band (∼1783 nm) intensity of Tm3+ ions at 533 K increased 168.7 times compared to that at 313 K. The possible thermal enhancement mechanism is illustrated by the negative thermal expansion (NTE) and Frenkel defect of the Y2W3O12 host. Finally, the optical temperature sensing performances of Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) samples are investigated according to the luminescence intensity dependence relationship on temperature. The maximum value of SR reached 4.24% K−1 at 353 K for Y2W3O12:10%Yb3+/0.6%Ho3+ phosphor. The results indicate that the Y2W3O12:10%Yb3+/x%RE3+ (RE = Er/Ho/Tm) phosphors possess anti-thermal quenching properties and are suitable for developing optical temperature sensors.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）