CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Liang Liang,Heyi Yang,Qinan Mao,Fangyi Zhao,Yang Ding,Xinyue Li,Meijiao Liu,Jiasong Zhong
The modulated luminescent materials of the emission colors are important for multimodal information encryption. Hence, realizing multi-mode luminescence and multi-application of singly doped phosphor is still a challenge. Here, we report a self-activation LiZnSbO 4 (LZSO) host exhibiting excitation-wavelength dependent emissions, producing a blue-white emission of 497 nm, a green emission of 517 nm and a significant green persistent luminescence (PersL) phenomenon when exposed to 254 nm and 300 nm UV light for 10 s. However, the introduction of Eu 3+ produces new emission at 610 nm, and at the same time the host emission blueshifts and produces blue emission at 300 nm excitation, yet the PersL remains green (asynchronous tuning). Besides, Eu 3+ generated a surprising anti-quenching phenomenon, realizing the overall color gradually changes from greenish blue to red. Based on the different responses of the host and Eu 3+ to temperature, the maximum relative sensitivity ( S r ) values of LZSO: Eu 3+ reach as high as 5.06 % K −1 (@423 K). The designed phosphors exhibit excitation-wavelength and temperature-dependent emissions and PersL, providing a more substantial advancement in the multi-application effect of information encryption and optical thermometers.
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
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Hong Li,Li Li,Lingsong Mei,Wei Zhao,Xianju Zhou,Huajing Gao,Xiaobing Luo,Yongbin Hua
Due to the huge food demand of the population, the luminescent materials with excellent performance applied for indoor plant cultivation have been extensively studied. In this work, a series of Mn 4+ -doped LaBaZnTaO 6 phosphors in were synthesized and its luminescence mechanism has been researched in detail. Due to their broad absorption band, they could be effectively excited by the NUV to blue LED chip. Importantly, suitable emission in the red region overlapped with the absorption of plant pigments making it possible to be used in indoor plant cultivation. On the other hand, high-sensitivity non-contact optical temperature sensor is the focus of current research, so the optical thermometer-based lifetime model also was designed and investigated in this work. Interestingly, the maximum relative sensitivity was 1.38 %K −1 @473 K, suggesting a good development potential of the sample in optical thermometry. Finally, the warm WLED device was fabricated and achieved a superior CRI value of 90.95 and a good CCT of 3582 K. All the obtained results suggest that it could become a promising red component to be applied in optical thermometer and lighting sources.
研究领域:
材料科学
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植物学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
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IF 4.825
Hang Zhang,Yujun Liang,Hang Yang,Shiqi Liu,Haoran Li,Yuming Gong,Yongjun Chen,Guogang Li
As increasing demand for noncontact temperature sensing, the development of a high-performance optical thermometer probe is more and more urgent. In this work, an efficient dual-mode optical thermometry strategy based on the Pr3+/Dy3+ energy transfer (ET) in some typical double-perovskite oxides is presented, which offers a promising way to design FIR/lifetime dual-mode optical thermometry with excellent temperature-measuring sensitivity and signal discrimination. According to this strategy, double-perovskite La2MgTiO6:Pr3+/Dy3+ phosphors are successfully synthesized. On the basis of diverse thermal responses between Pr3+ and Dy3+, the FIR of Pr3+ to Dy3+ (four FIR mode) in this material displays outstanding optical thermometry performance from 298 to 548 K. The maximum absolute and relative sensitivities (Sa and Sr) of mode 1 are 0.09 and 2.357% K–1, being better than the current optical temperature measurement materials. For the fluorescence lifetime mode, the Sa-max and Sr-max values reach 2.85 × s 10–4 and 1.814% K–1. Furthermore, the dual-mode optical thermometry mechanism was presented and studied. It also demonstrated excellent optical thermometry performance in the other Pr3+/Dy3+ codoped double-perovskite oxides, such as LaMg0.598Nb0.402O3, NaLa(MoO4)2, NaGd(MoO4)2, and NaLa(WO4)2, proving the universality of the presented strategy. This article presents an effective Pr3+/Dy3+ ET pathway for developing new and highly sensitive FIR/lifetime dual-mode optical temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
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
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 15
·4711-4720
·
IF 6.1
Zhexuan Gao,Yi Zhang,Yinyan Li,Shilong Zhao,Peng Zhang,Xiaolong Dong,Degang Deng,Shiqing Xu
The second near-infrared window (NIR-II, 1000–1700 nm) emitting phosphor is a key component for the phosphor-converted light-emitting diode (pc-LED), which has garnered significant attention. However, it remains a major challenge to discover efficient NIR-II broadband phosphors that can be excited by blue LEDs. Herein, Cr3+ and Ni2+ ions were co-doped into the Li2ZnSn3O8 (LZSO) host. LZSO:Cr3+,Ni2+ phosphor achieves a broadband NIR-II emission peak at 1465 nm with a large full width at half maximum (FWHM) of 300 nm and internal quantum efficiency (IQE) of 43.31% under excitation at 426 nm because of the efficient energy transfer (ET) from Cr3+ to Ni2+. In addition, a dual-emissive doped phosphor across the NIR-I (700–1000 nm) and NIR-II regions with a higher sensitivity at physiological temperatures was obtained. The relative sensitivity value (Sr) reaches 1.44% K−1 at 293 K, indicating that the LZSO:Cr3+,Ni2+ phosphor is a potential candidate for NIR optical thermometers in biotechnological applications. The manufactured NIR-II pc LED provides a radiative flux of 8.26 mW with a photoelectric conversion efficiency of 2.71% at a drive current of 100 mA and has promising potential in night vision, medical imaging, and spectral analysis applications.
研究领域:
材料科学
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生物医学工程
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Xuan Liu,Qihua Yang,Guihua Li,Hanqi Wei,Jiani Wu,Zhiwei Luo,Gemei Cai,Xiaojun Wang
ABSTRACT In recent years, all inorganic CsPbX 3 (X = F, Cl, Br, and I) perovskite quantum dots (QDs) have garnered increasing attention for their exceptional optical properties. However, the commercialization of CsPbX 3 is hampered by poor environmental stability and lead toxicity. Fortunately, the strategy of incorporating CsPbX 3 into microcrystalline glass effectively addresses this issue. Notably, CsPbF 3 demonstrates improved phase stability and a unique electronic structure, making its exploration crucial for various applications. In this study, we synthesized CsPbF 3 QDs-in-glass (QiG) and Tb 3+ -doped CsPbF 3 QDs-in-glasses (QiGs) using melt quenching and in-situ growth methods. The CsPbF 3 QiG exhibits intrinsic photoluminescence with the main peak in the ultraviolet range, while Tb 3+ -doped glasses show co-emission of CsPbF 3 QDs and Tb 3+ , allowing tunable colors by adjusting Tb 3+ content. We systematically studied and evaluated the application of Tb 3+ -doped CsPbF 3 QiG as an optical temperature sensor. Importantly, the glass sample demonstrates high stability, including good thermal stability, superior high-temperature resistance, and moisture stability. This work significantly contributes to the exploration of the optical properties of CsPbF 3 QiG, providing new insights into its future applications in diverse optical-related fields.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Minghan Zhou,Tongtong Gao,Shuanglong Chen,Xuejiao Wang,Qiushi Wang,Cailong Liu
Due to its unique advantages including non-contact operation, high sensitivity, and exceptional spatial resolution, nanoscale optical thermometry has become an indispensable technique with widespread applications in micro/nanoelectronics, integrated photonic systems, and biomedical engineering. Here, Yb 3+ /Tm 3+ co-doped AlN nanowires were successfully synthesized via an arc-discharge method. The nanowires, characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy, exhibit lengths of several micrometers and uniform diameters ranging from 10 to 20 nm, yielding a high aspect ratio. Under 980 nm excitation, the nanowires display distinct up-conversion (UC) luminescence, with emission bands at 544 nm (green), 654 nm and 691 nm (red), and 795 nm (near-infrared), corresponding to Tm 3+ ion transitions. The AlN:Yb 3+ /Tm 3+ nanowires show excellent optical thermometry performance, achieving a maximum relative sensitivity ( S r ) of 3.32 % K −1 at 298 K and a temperature resolution ( δT ) of 0.009 K. These results underscore the potential of AlN:Yb 3+ /Tm 3+ nanowires for advanced optical temperature sensing in nanotechnology, biomedical applications, and high-resolution thermal imaging.
研究领域:
材料科学
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纳米技术
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 34
·1-8
·
IF 2.8
Zhang Gang,Yuwen Juntao,Lü Ruoxi,Wang Qing,Tang Zhipeng,Wu Kaiming
Precipitation of functional nanocrystals into glasses can endow many interesting properties to glasses and widen their application fields. In this work, optically active rare-earth ions doped Lu 4 Zr 3 O 12 nanocrystals were precipitated in silicate glasses through conventional melt-quenching and subsequent thermal treatment method. X-ray diffraction and transmission electron microscopy analysis confirmed the precipitation of Lu 4 Zr 3 O 12 nanocrystals upon thermal treatment. Absorption, emission and excitation-wavelength dependent emission spectra confirmed that Er 3+ ions were incorporated into Lu 4 Zr 3 O 12 nanocrystals. Green up-conversion emission was observed from these Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses, and the temperature-dependent up-conversion emission showed that the Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses had potential for low-temperature optical thermometry.
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 RARE EARTHS
·
2023
·
IF 4.9
Xiaorong Li,Ge Gao,Kaiyu Wang,Zhaoqiong Chen,Zejiang Gao,Qingyong Qin,Li Chen,Bingsuo Zou
With the increasing demand for non-contact fluorescence intensity ratio-based optical thermometry, novel phosphor materials with high-efficiency, dual-emitting centers, and differentiable temperature sensitivity are highly desired. In this work, rare earth Eu 2+ ions were incorporated into CsCu 2 I 3 microcrystals by solid–state reaction. Under a single UV excitation, the as-synthesized samples exhibit two emissions: 452 nm blue emission from the 5d→4f transition of Eu 2+ and 582 nm yellow emission from self-trapped exciton emission of CsCu 2 I 3 . The photoluminescence quantum yield reaches to 50%. The dual-band emission of Eu 2+ -doped CsCu 2 I 3 shows different temperature responses in the range of 260–360 K. Based on fluorescence intensity ratio technology, the maximum absolute sensitivity and relative sensitivity are 0.091 K –1 (at 360 K) and 2.60%/K (at 260 K), respectively. These results suggest that Eu 2+ -doped CsCu 2 I 3 could be a good candidate for highly sensitive optical thermometer.
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
Jiaqi Wang,Tongtong Gao,Huiling Zheng,Shuanglong Chen,Xuejiao Wang,Qiushi Wang
Rare-earth (RE) doped aluminum nitride (AlN) holds great promise for integrated optoelectronic devices. Here, the Ho and Yb co-doped AlN (AlN:Ho 3+ /Yb 3+ ) submicron towers were prepared by a direct nitridation route. XRD, Raman, XPS and EDS studies showed successful doping of Ho and Yb ions into AlN. SEM images show that the submicron towers have an interesting layered structure by layer-by-layer stacking of hexagonal AlN nanosheets. Under excitation at 980 nm, AlN:Ho 3+ /Yb 3+ submicron towers exhibit up-conversion (UC) luminescence at 540, 550, 659, and 762 nm, which are due to Ho 3+ /Yb 3+ system from 5 F 4 , 5 S 2 → 5 I 8 , 5 F 5 → 5 I 8 , and 5 F 4 , 5 S 2 → 5 I 7 respectively. Based on the intensity ratio and decay lifetime of UC luminescence, the optical temperature sensing characteristics are investigated from 298 K to 548 K. The maximum relative sensitivities associated with the intensity ratio of I 540, 550 and I 659 and decay lifetime of 659 nm are as high as 2.73% K −1 and 0.43% K −1 , respectively. This work broadens the optoelectronic properties of RE doped AlN.
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
·
2024
·
IF 5.8
Chong Yang,Juling Long,Bin Li,Rongbo Ma,Bin Cao,Chaoyong Deng,Weichao Huang
A series of CaLaMgSbO 6 : Sm 3+ orange-red phosphors were synthesized using a high-temperature solid-state method. These phosphors' phase, luminescence properties, and thermal stability were thoroughly investigated. Under 405 nm excitation, the CaLaMgSbO 6 : Sm 3+ phosphor exhibit a broadband orange-red emission with the maximum emission peak positioned at 598 nm. The optimal CaLaMgSbO 6 : 0.025Sm 3+ phosphor features CIE chromaticity coordinates of (0.5902, 0.4085) with an orange-red hue. Impressively, the emission intensity at 423 K remains at 78.7 % of its room temperature intensity, which shows its outstanding thermal stability. The emission spectra of light-emitting diodes (LEDs) fabricated with CaLaMgSbO 6 : 0.025Sm 3+ phosphor possess a large overlap with the absorption band of phytochromes. Meanwhile, the temperature-sensing properties of CaLaMgSbO 6 : Sm 3+ phosphors were studied across various wavelength bands using the fluorescence intensity ratio (FIR) technique. The relative sensitivity of FIR (I 598 /I 563 ) was found to be highest at 298 K, measuring 0.15 % K −1 . The above research results suggest that CaLaMgSbO 6 : Sm 3+ phosphors have potential applications in plant growth and optical temperature sensing.
研究领域:
材料科学
·
光学
·
植物学
✓ 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
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