JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Xinwen Liu,Guolong Tan,Zhiwei Zhou,Bingchu Mei
The Sr 5 (PO 4 ) 3 F (S-FAP) crystal material is regarded as one of the most ideal optical materials for diode pumping owing to its huge absorption and emission cross sections and long fluorescence lifespan. In this investigation, S-FAP powders with varying Yb concentrations (0.1–5%) were produced using the coprecipitation method. Then a variety of S-FAP transparent ceramics with varying Yb content were fabricated using hot-pressing sintering. The crystalline phase structure of hexagonal Sr 5 (PO 4 ) 3 F was verified by XRD analysis of the precursor powder and the final ceramics. According to the powder SEM, the average grain size and the long axial-radial ratio of powders are decreasing as the Yb 3+ concentration increases. Thermal-etched surface SEM reveals nanostructured S-FAP transparent ceramics with an average grain size of less than 200 nm were synthesized. The highest transmittances of the 3% ceramics at 500 and 1100 nm wavelengths are 51% and 79.78%, respectively. The ceramic cross-sectional SEM demonstrated that porosity is the primary scattering source influencing the enhancement of optical characteristics. The absorption, emission, and fluorescence lifetimes of S-FAP transparent ceramics with varying Yb concentrations were tested and discussed, and the absorption and emission cross sections corresponding to the major peak were reported. Some physical parameters of this set of ceramic samples were shown, including thermal diffusivity , specific heat capacity, and thermal diffusivity data, as well as micro-hardness.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Particuology
·
2015
·
IF 2.11
Rongjin Sun,Peiyu Qiu,Ting Yin,Guo Gao,Hualin Fu,Kan Wang,Chunlei Zhang,Daxiang Cui
Highly-dispersed BaLuF 5 :Yb 3+ /Er 3+ nanocrystals were prepared by a facile potassium sodium tartrate-assisted hydrothermal method. The average particle size was approximately 20–25 nm. The formation mechanism is discussed. Potassium sodium tartrate led to form a complex with an approximately three-dimensional network structure, which insured largely concurrent nucleation. As a result, we acquired uniform nanoparticles. The hydrothermal temperature, holding time, and pH value were important factors affecting the formation of the BaLuF 5 :Yb 3+ /Er 3+ nanocrystals. We investigated their influence on the formation and realized the optimal reaction parameters. Remarkably, potassium sodium tartrate also contributed to the biocompatibility and potential biomedical applications of BaLuF 5 :Yb 3+ /Er 3+ nanocrystals by decomposing into small organic groups attached to the nanoparticles.
研究领域:
材料科学
·
纳米医学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tong Feng,Yuanlin Jin,Zhangwen Long,Dacheng Zhou,Xiaqing Jiang,Bitao Liu,Jianbei Qiu
Phosphor conversion light-emitting diode (PC-LED) technology has become a focal point of research for portable near-infrared light sources in recent years. One of the crucial aspects is to develop phosphor materials that can be effectively stimulated by commercial available blue light. Unfortunately, efficient phosphors in the NIR-II that can be excited by commercial blue light are particularly scarce. In this study, Mg 4 Ta 2 O 9 :0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + (MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + ) phosphor was synthesized using the high temperature solid phase method, and its emission spectrum covered the first and second near-infrared windows (700–1200 nm). The internal quantum efficiency (IQE) and external quantum efficiency (EQE) are 88.7 % and 45.6 %, respectively, due to the synergistic effect of energy transfer and Li-ion modification. Additionally, the doping of Yb 3+ ions and Li + ions enhances the thermal stability of luminescence. The thermal stability of MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + and MTO:0.04Cr 3+ ,0.03Yb 3+ is 9.81 % and 14.43 % higher, respectively, than that of MTO:0.04Cr 3+ ,0.03Yb 3+ and MTO:0.04Cr 3+ . To evaluate its potential applications, we developed a prototype PC-LED utilizing MTO:0.04Cr 3+ ,0.03Yb 3+ ,0.07Li + phosphor as an emission emitter which demonstrated advantages in biomedical imaging, night vision, and non-destructive testing.
研究领域:
材料科学
·
光学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Ziqing Li,Pengfei Zhu,Jimin Ding,Nianjing Ji,Yang Chen,Zhenyan Wang,Xiulan Duan,Huaidong Jiang
Yb-doped inorganic crystals have attracted great attention in both basic and applied research, and the quest for suitable crystal hosts and understanding the corresponding crystal field environments are still worth studying in laser application. In this context, inclusion-free RbTiOPO4:Ta:Yb (RTP:Ta:Yb) single crystals with dimensions up to 3 × 30 × 15 mm3 were grown by top-seeded solution growth method under optimized growth conditions. The good crystalline quality of the as-grown RTP:Ta:Yb crystals were confirmed by X-ray diffraction rocking curve. The chemical compositions of the crystals were determined through electron probe microanalysis (EPMA). The results showed that the Ta distribution coefficient is 0.90–1.28, and the Yb distribution coefficient is 0.13–0.37. Double doping of Ta5+ ions can effectively increase the concentration of Yb3+ ions in the RTP crystal, and the concentration of Yb3+ ion in RTP crystal can reach 1.26 × 1020 atom/cm3. The influence of Ta and Yb dopants on the electronic structures of RTP crystals was studied using high-resolution X-ray photoelectron spectroscopy (XPS), and the chemical strengths of Ti–O and P–O bonds are related to the binding energy difference. RTP:Ta:Yb crystals exhibit excellent transparent performance in the wavelength range of 0.35–4.5 μm, and the transmittance is about 83%. Photoluminescence spectra show five emission peaks of Yb3+ in crystals, and the main emission peak is located at 972 nm. Two different coordination sites for Yb3+ were observed, and their energy levels were determined in the crystal field of the RTP:Ta structure. Furthermore, the crystal field strengths of Yb3+ in different host crystals associated with their distorted coordination environments were evaluated and discussed in detail. The results demonstrate that the RTP:Ta:Yb single crystal endowed with high crystal field strength and good luminescence property is suitable for laser application.
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 PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2014
·
IF 2.291
Xingyuan Guo,Changfeng Chen,Shengyan Yin,Weiye Song,Feng Shi,Weiping Qin.
In this work, the effects of NaYF 4 :Yb 3+ , Tm 3+ (NYT) structure on the near-infrared light (NIR) photocatalysis performance of ZnO were investigated. α-NYT/ZnO nanocomposites (NCs) and β-NYT/ZnO NCs were fabricated by a high temperature decomposition reaction method. The prepared NCs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis spectroscopy, Raman spectroscopy, and photoluminescence spectra (PL). The NIR photocatalytic activities of the synthesized α- and β-NYT/ZnO NCs were studied by the degradation of Rhodamine B. The differential photocatalytic activities between of α- and β-NYT/ZnO NCs are believed to be correlated to the effects of α- and β-NYT on the oxygen vacancies and exposed crystal face of ZnO.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Yuebin Xu,Aierpati Taximaimaiti,Ru Xie,Hairegu Tuxun,Min Yin,Aierken Sidike
Upconversion luminescent (UCL) materials have broad application prospects in the field of temperature sensing; thus, improving the luminescence performance and temperature measurement sensitivity of upconversion phosphors is highly important. In this study, SrAl 2 Si 2 O 8 with good thermal stability was doped with Ho 3+ and Yb 3+ , and the optimal concentration was determined to be SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ (in mole fraction). A series of (Sr 0.87‒ x Ba x )Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphor samples was prepared by using a cationic substitution strategy and further doping Ba 2+ to replace the Sr 2+ lattice in the matrix. The results show that the introduction of Ba 2+ effectively replaces Sr 2+ and significantly increases the upconversion fluorescence emission intensity of SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ by approximately 2.9 times. The temperature sensing properties of SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ and Sr 0.37 Ba 0.50 Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ were investigated. The Ho 3+ -based 5 F 5 and 5 S 2 / 5 F 4 nonthermal coupled energy level fluorescence intensity ratio (FIR) techniques in the Ba 0.37 Sr 0.50 Al 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphors show a maximum temperature measurement absolute sensitivity of 4.32%/K at 573 K and a maximum relative sensitivity of 1.08%/K at 373 K; these values are 5.8 and 3.2 times greater, respectively, than that of the non-Ba 2+ -doped SrAl 2 Si 2 O 8 :1%Ho 3+ , 12%Yb 3+ phosphor. These results not only confirm the effectiveness of the cation substitution strategy in enhancing the upconversion luminescence performance and temperature sensing characteristics but also provide a scientific basis for the design of high-performance optical temperature sensors.
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
·
2024
·
IF 5.8
Chenglin Gong,Lin Lin,Yingzhen Wu,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Yantang Huang,Zhiqiang Zheng
In this paper, Cs 2 NaErCl 6 double perovskites microcrystals (MCs) co-doped with Yb 3+ and Bi 3+ are successfully synthesized by a simple “dissolving-drying” method. When excited at 379 nm, 808 nm and 980 nm, the MCs show strong red, green and yellow light, respectively, which can be well distinguished by the naked eyes. On this basis, two kinds of systems are designed with doped/undoped MCs for triple-mode fluorescent anti-counterfeiting and information encryption of numbers and characters. The results indicate that our MCs are not only beneficial to the application of fluorescent anti-counterfeiting, but also greatly improve the security of anti-counterfeiting. In addition, we evaluate the temperature sensing performance of these MCs by fluorescence intensity ratio technique. The samples show a high relative sensitivity as 3.8 %/K at 243 K. The results show that the samples have multi-functional applications in the fields of fluorescent anti-counterfeiting and temperature sensing, and this work will broaden the application fields of lead-free double perovskites in fluorescent anti-counterfeiting and 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
Materials Research Express
·
2018
·Vol. 5
·期 6
·066204
·
IF 1.151
Tao Pang,Zejun Huang
In this paper, a novel upconversion phosphor is reported. Based on XRD and EDS, it is confirmed that the phosphor is monoclinic Gd2Mo4O15:Yb3+, Ho3+ with P21/c space group. The non-radiation decay of 5I6 to 5I7 dominants the depopulation of 5I6, thus the phosphor produces the red upconversion emission with high emission intensity and good color quality, and shows the favorable temperature sensing property. When using non-continuous excitation mode, the temperature sensitivity is determined as 0.0452 K−1. Because the sensitivity is the same at any temperature, the new upconversion material may have greater potential for temperature sensing application than Er3+ doped upconverison materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 32
·12352-12361
·
IF 4.569
Hongqiang Cui,Yongze Cao,Yuhang Zhang,Lei Li,Guojian Li,Sai Xu,Yichao Wang,Jinsu Zhang,Baojiu Chen
A series of Er3+/Yb3+ co-doped Cs3BiSr(P2O7)2 (CBSPO) phosphors with significant thermal enhancement were successfully prepared using the solid-state method and the thermal-enhancing effect was studied in detail. When the temperature increased from 303 to 723 K, the upconversion luminescence (UCL) emission intensities of 2H11/2 → 4I15/2 and 2H11/2 + 4S3/2 → 4I15/2 of Er3+ in CBSPO:0.1Er3+/0.2Yb3+ were enhanced 22.81 and 10.06 times under 980 nm laser excitation, respectively. Meanwhile, the UCL color of the sample obviously changed from orange to green with the increase in temperature. Furthermore, the UCL thermal enhancement mechanism was demonstrated, which originates from phonon-assisted transitions. In addition, the maximum absolute temperature sensitivity for CBSPO:0.1Er3+/0.2Yb3+ was calculated to be 0.01026 K−1 at 563 K via luminescence intensity ratio (LIR) technology. All the results show that the CBSPO:Er3+/Yb3+ phosphors can be used for safety warning and temperature measurement at high temperatures.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-12
·
IF 20.257
Zhang Yan,Miao Shihai,Liang Yanjie,Liang Chao,Chen Dongxun,Shan Xihui,Sun Kangning,Wang Xiao-Jun
The growing demand for spectroscopy applications in the areas of agriculture, retail and healthcare has led to extensive research on infrared light sources. The ability of phosphors to absorb blue light from commercial LED and convert the excitation energy into long-wavelength infrared luminescence is crucial for the design of cost-effective and high-performance phosphor-converted infrared LEDs. However, the lack of ideal blue-pumped short-wave infrared (SWIR) phosphors with an emission peak longer than 900 nm greatly limits the development of SWIR LEDs using light converter technology. Here we have developed a series of SWIR-emitting materials with high luminescence efficiency and excellent thermal stability by co-doping Cr 3+ -Yb 3+ ion pairs into Lu 0.2 Sc 0.8 BO 3 host materials. Benefitting from strong light absorption of Cr 3+ in the blue waveband and very efficient Cr 3+ →Yb 3+ energy transfer, the as-synthesized Lu 0.2 Sc 0.8 BO 3 :Cr 3+ ,Yb 3+ phosphor emits intense SWIR light in the 900–1200 nm from Yb 3+ under excitation with blue light at ~460 nm. The optimized phosphor presents an internal quantum yield of 73.6% and the SWIR luminescence intensity at 100 °C can still keep 88.4% of the starting value at 25 °C. SWIR LED prototype device based on Lu 0.2 Sc 0.8 BO 3 :Cr 3+ ,Yb 3+ phosphor exhibits exceptional luminescence performance, delivering SWIR radiant power of 18.4 mW with 9.3% of blue-to-SWIR power conversion efficiency and 5.0% of electricity-to-SWIR light energy conversion efficiency at 120 mA driving current. Moreover, under the illumination of high-power SWIR LED, covert information identification and night vision lighting have been realized, demonstrating a very bright prospect for practical applications.
研究领域:
光学材料
·
固态照明
·
红外光谱学
·
发光二极管技术
·
光转换材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hao Gou,Qian Wu,Laihui Luo,Weiping Li,Peng Du
Series of Er 3+ /Yb 3+ -codoped Gd 2 Mo 3 O 12 (GMO:Er 3+ /2 x Yb 3+ ) microparticles with dual-mode luminescence were fabricated with the assistance of sol-gel method. The phase structure, morphological information, upconversion (UC) and down-shifting luminescence properties of the final products were systematically investigated. At 980 nm light irradiation, strong UC emissions rise in all the products and their intensities depend on the dopant concentration, where the optimum status occurs at x = 0.25 and the two-photon capture procedure results in the UC emission mechanism. Besides, excited at 378 nm, the down-shifting photoluminescence is also gained in resulting samples. By means of the fluorescence intensity ratio technique, the thermometric properties of the studied samples were investigated through analyzing the diverse thermal quenching features of the green emissions from thermally coupled levels of Er 3+ . When the UC emission is selected, the maximum absolute and relative sensitivities of the GMO:Er 3+ /2 x Yb 3+ microparticles are 0.0076 and 1.15% K −1 , respectively, whereas they shift to 0.0036 and 0.89% K −1 , respectively, when the down-shifting photoluminescence is adopted. Note that, the sensor sensitivities of developed microparticles are related to the luminescence mode, while they do not depend on Yb 3+ content. These results suggest that the GMO:Er 3+ /2 x Yb 3+ microparticles are promising thermosensitive luminescent materials for optical thermometry and their thermometric features can be tuned through changing luminescence mode.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2016
·Vol. 6
·期 4
·1056-1064
·
IF 2.657
Lili Huo,Jiajia Zhou,Ruozhen Wu,Junfei Ren,Shengjun Zhang,Junjie Zhang,Shiqing Xu
Hexagonal-phase NaYF4: Yb3+, Er3+ nanoparticles (NPs) have been widely used as the most efficient NIR-to-visible upconversion (UC) luminescent and probe in bioscience. Here, we exploited not only the function of dual-mode emission of β-NaYF4: Yb3+, Er3+ NPs in the near infrared (NIR) and visible regions with single wavelength excitation at 980 nm, but also the function of physiological temperature sensing with the luminescence of Er3+ in the visible region. The structural and optical characteristics of β-NaYF4: Yb3+, Er3+ NPs were obtained using X-ray diffraction (XRD), scanning electron microscopy (SEM),and fluorescence spectral measurements, respectively; the mechanism for the energy transfer has been suggested with emphasis on the optimized Er/Yb concentration for most efficient UC. Due to the UC and down-shifting NIR properties, we achieved the dual-functional nanoparticles with potential application in physiological range temperature sensing and bioimaging simultaneously.
研究领域:
生物医学工程
·
纳米技术
·
光学成像
✓ 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）