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
Advanced Optical Materials
·
2024
·
IF 8
Changhe Hu,Xiao Li,Wenfeng Xie,Jie Liu,Huhui Fu,Yaning Zhang,Jingbing Lu,Qi Xiong,Yuanqi Qian,M. Liu
Alkaline zirconium fluorides (A x Zr y F x+y , A = Li, Na, and K), featuring unique crystallographic structures, have recently emerged as a class of attractive hosts for fabricating lanthanide (Ln 3+ )-doped upconversion nanocrystals (UCNCs) that exhibited distinct morphology, upconversion luminescence (UCL) performance, and physicochemical property. In this paper, for the first time the controlled preparation of Yb 3+ /Er 3+ -doped UCNCs is reported based on the trigonal Cs 2 ZrF 6 host, leading to tunable morphology and size of the resulting UCNCs by varying the reaction temperature and time. By further incorporating Na + ions into the Cs 2 ZrF 6 crystal lattice, sub-10 nm Yb 3+ /Er 3+ /Na + tridoped UCNCs with highly improved crystallinity and thus greatly enhanced UCL intensity are obtained. Moreover, these resulting UCNCs display abnormal thermal enhancement of UCL over a temperature range from 333 to 493 K, enabling the fabrication of supersensitive luminescent nanothermometers for temperature sensing. Based on the luminescence intensity ratio of two nonthermally coupled levels (i.e., 4 F 9/2 and 2 H 11/2 ) of Er 3+ , the as-prepared Cs 2 ZrF 6 :Yb/Er/Na UCNCs exhibit an extremely large absolute sensitivity of 177.3% K −1 and a considerably high relative sensitivity of 1.52% K −1 at 333 K. These results unambiguously demonstrate that Cs 2 ZrF 6 is a suitable host material for preparing small-sized Ln 3+ -doped UCNCs as nanothermometer for high-performance ratiometric temperature sensing.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xi Chen,Yuexiao Pan,Yihong Ding,Hongzhou Lian,Jun Lin,Liyi Li
The quest for efficient and tunable luminescent materials has been at the forefront of research in the fields of chemistry and materials science. This work delves into the investigation of the luminescence properties of Er3+ ions triggered by 1% Te4+ in the environmentally benign perovskite Cs2NaYbCl6 (CNYC) crystals, aiming to enhance their efficiency and tune the luminescence color. The ratio of the green (2H11/2, 4S3/2–4I15/2) to red (4F9/2–4I15/2) emissions of Er3+ can be freely tunable by varying the concentration of Er3+ and producing the defects induced by codoping Te4+. The calculations reveal that the multiexcitonic excitations of Er3+ stem from f–f (4I15/2–4G11/2, 2H9/2) rather than d–f transitions. The broadened excitation, tuning of color, and enhancement of efficiency achieved in the luminescence perovskite crystals Cs2NaYbCl6:Te4+, Er3+ (CNYC:Te4+,Er3+) presents promising opportunities for the development of advanced optoelectronic devices with superior performance. Moreover, our investigation demonstrates the tunable luminescence response of CNYC:Er3+ to temperature variations, offering potential applications in temperature sensing.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruonan Wang,Ruitong Song,Chenning Wang,Tian Luo,Junshan Hu,Hao Fu
Although upconversion luminescence (UCL) materials have attracted considerable attention in biomedical, lighting, anti-counterfeiting, and solar cells due to their excellent fluorescence properties, reports of the dibarium gadolinium aluminum oxide (Ba 2 GdAlO 5 ) are scarce. Herein, we synthesized the single-phase Ba 2 GdAlO 5 material with non-stoichiometric Ba 2 Gd 1.06 Al 0.94 O 5 (denoted as BGAO, hereafter). The X-ray Rietveld refinement reveals that the substitution of Gd for Al accounts for the non-stoichiometry. Notably, the UCL properties of BGAO are realized by doping with Yb 3+ and Er 3+ ion pair, and it can be further enhanced significantly by co-doping with appropriate Zn 2+ ions. The SEM images show that the particle size increases as the concentration of Zn 2+ ions increases. The X-ray Rietveld refinement results of the Zn-doped BGAO: 0.1 Yb 3+ , 0.03Er 3+ phosphor indicate the substitution of Zn 2+ for Ba 2+ and Al 3+ ions simultaneously. Grain growth and lattice distortion account for the improvement of UCL properties after Zn 2+ ions doping. In addition, the temperature sensing performance of the Zn 2+ -doped sample has been researched based on the fluorescence intensity ratio (FIR) technique, and the maximum absolute and relative sensitivities ( S A-max and S R-max ) are obtained to be 4.8 × 10 −3 K −1 at 498 K and 1.1% K −1 at 298 K, respectively. This work provides a candidate with high UCL intensity for potential applications in optical 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 MATERIALS SCIENCE
·
2017
·Vol. 53
·期 2
·1395-1403
·
IF 2.599
Yi Mengji,Liu Yuefeng,Gao Huiping,Huang Zhangyu,Liang Jiwei,Mao Yanli
In this manuscript, Ni 2+ ions-doped NaYF 4 :Yb 3+ /Er 3+ nanoparticles have been synthesized via a modified hydrothermal method. The upconversion luminescence intensities of the green (G) and red (R) emission of NaYF 4 :Yb 3+ /Er 3+ co-doped with 20 mol% Ni 2+ ions are the strongest which increase 32.84 and 20.99 times than that without doping Ni 2+ , respectively. In addition, the R/G ratio decreases with the concentration of Ni 2+ increasing from 0 to 40 mol%. The underlying reason for luminescence enhanced and the R/G ratio decreased by Ni 2+ doping is explored by a series of controlled experiments, and the mechanism based on the crystal field asymmetry, different substitution by Ni 2+ , the energy transition of Er 3+ is studied in detail. The study indicates that the misshapen crystal field plays an important role in enhancement fluorescence emission, and several factors affect the R/G ratio including the crystal field, the substitution site and the energy transition. Our result may play a certain function for study and design of high-performance upconversion materials.
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
·
2024
·
IF 3.3
En-Ting Wang,Junhan Yang,Weiping Guo,Qingyi Liu,Qi Zhang,Wei Zhang,Xinhan Chen,Lizhen Zhang,XiaoDong Yi,Guoqiang Wang,Yan Yu,Lingyun Li
Oxychloride phosphors that contain active ions coordinated with both oxygen and chloride ions have garnered significant attention, but the application of oxychloride phosphors is yet limited because of their demanding synthesis condition of vacuum or reducing atmosphere. Herein, we synthesize a new serial oxychlorides of La 9 W 6 O 30 Cl (LWOC) and Er 3+ /Yb 3+ , Ho 3+ /Yb 3+ , Tm 3+ /Yb 3+ doped LWOC through molten salt shielding method (MSS) in air, which is more efficient compared to the traditional method in vacuum. The compound of LWOC crystallizes in the tetragonal system space group P 4 2 / nmc (No. 137) with cell parameters a = b = 10.0445(1) Å, c = 12.6826(4) Å, V = 1279.57(5) Å 3 and Z = 11. The asymmetric unit of LWOC includes three La atoms, one unique W atom, two disordered W atoms with occupancy factors of 0.16(5) and 0.84(5), respectively, one Cl atom and six O atoms. Under the excitation of 980 nm laser, all the Er 3+ /Yb 3+ , Ho 3+ /Yb 3+ and Tm 3+ /Yb 3+ co-doped LWOC phosphors have excellent upconversion (UC) luminescence with bright visible light emission. A fluorescence intensity ratio (FIR) type temperature sensor is developed by using LWOC: Er 3+ , Yb 3+ phosphor as sensing media, which has a maximum relative temperature sensitivity ( S r ) of 0.90 % K −1 at 300 K.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Kun Ge,Cuimiao Zhang,Wentong Sun,Huifang Liu,Yi Jin,Zhenhua Li,Xing-Jie Liang,Guang Jia,Jinchao Zhang
The rare earth hollow spheres with up-conversion luminescence properties have shown potential applications in drug delivery and bioimaging fields. However, there have been few reports for the degradation properties of rare earth oxide drug carriers. Herein, uniform and well-dispersed Y2O3:Yb3+,Er3+ hollow spheres (YOHSs) have been fabricated by a general Pechini sol–gel process with melamine formaldehyde colloidal spheres as template. The novel YOHSs with up-conversion luminescence has good drug loading amount and drug-release efficiency; moreover, it exhibits pH-responsive release patterns. In particular, the YOHSs sample exhibits low cytotoxicity and excellent degradable properties in acid buffer. After the sample was loaded with anticancer drug doxorubicin (DOX), the antitumor result in vitro indicates that YOHS-DOX might be effective in cancer treatment. The animal imaging test also reveals that the YOHSs drug carrier can be used as an outstanding luminescent probe for bioimaging in vivo application prospects. The results suggest that the degradable drug carrier with up-conversion luminescence may enhance the delivery efficiency of drugs and improve the cancer therapy in clinical applications.
研究领域:
生物医学工程
·
纳米医学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xueting Zhao,Junhao Ma,Jindan Zha,Kuisui Huang,Chenghui Chai,Zhaoyi Yin,Zhiguo Song,Jianbei Qiu,Yongjin Li
Traditional inorganic photoreversible color-switching materials (PCSMs) usually exhibit slow color switching and single color switching characteristics, which severely restrict their use in information storage, anti-counterfeiting, and other applications. Herein, we report a fast photoresponsive color-switching inorganic PCSM based on oxygen-vacancy (OV) Bi3O4Br:Yb3+,Er3+ (BYE-OV) nanosheets. The BYE-OV nanosheets demonstrated considerable photoreduction activity and effective charge carrier separation when exposed to ultraviolet (UV) light, resulting in a rapid change in color from light yellow to dark brown. Moreover, under 980-nm excitation, the green and red emissions of the BYE-OV nanosheets were considerably enhanced, being 9.6 and 8.8 times higher than those of the BYE nanosheets, respectively. Additionally, BYE-OV nanosheets were combined with an agarose hydrogel to produce BYE-OV/agarose nanocomposite films, which exhibited excellent photoreversible color switching and upconversion (UC) luminescence. This research provides new insights into the development of innovative inorganic PCSMs, thereby considerably broadening their potential applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-12
·
IF 5.228
Pan Qiwen,Yang Dandan,Kang Shiliang,Qiu Jianrong,Dong Guoping
Rare earth doped mid-infrared (MIR) fluorescent sources have been widely investigated due to their various potential applications in the fields of communication, chemical detecting, medical surgery and so forth. However, with emission wavelength extended to MIR, multiphonon relaxation process that strongly quenched the MIR emission is one of the greatest challenges for such practical applications. In our design, we have described a controllable gas-aided annealing strategy to modulate the phase, crystal size, morphology and fluorescent performance of a material simultaneously. Uniform and monodispersed Er 3+ -doped La 2 O 2 S and La 2 O 2 SO 4 nanocrystals with a similar lattice structure, crystallinity, diameter and morphology have been introduced to investigate the impact of multiphonon relaxation on luminescence performance. Detailed spectroscopic evolutions in the region of MIR, near-infrared (NIR), visible upconversion (UC) and their corresponding decay times provide insight investigation into the fluorescent mechanism caused by multiphonon relaxation. A possible energy transfer model has also been established. Our results present direct observation and mechanistic investigation of fluorescent evolution in multiphonon relaxation process, which is conductive to design MIR fluorescent materials in the future. To the best of our knowledge, it is the first investigation on MIR fluorescent performance of La 2 O 2 S nanocrystals, which may find various applications in many photoelectronic fields.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2017
·
IF 2.238
Jianjian Sun,Bijun Fang,Shuai Zhang,Zhihui Chen,Jianning Ding,Xiangyong Zhao,Haosu Luo
Er 3+ -doped Na 0.5 Bi 0.5 TiO 3 (Er-doped NBT) ceramics were prepared via a hydrothermal method . High sintering active Er-doped NBT nano cubic particles with perovskite structure were synthesized at hydrothermal condition of 200 °C for 24 h in 12 M NaOH solution, which were self-assembled via in situ crystallization mechanism by the initially as-grown nanowires. The Er-doped NBT ceramics sintered at 1100 °C for 2 h exhibit pure rhombohedral perovskite structure, high densification and rather homogenous microstructure morphology. Under 488 nm light excitation , the strong green emission peaks centering at 530 nm and 550 nm and the weak red emission peaks locating at 665 nm and 735 nm are excited, which can be attributed to the 2 H 11/2 , 4 S 3/2 , 4 F 9/2 and 4 I 9/2 → 4 I 15/2 transitions, respectively. The maximum emission intensity is obtained when the Er doping content reaches 1.0 mol%. A strong upconversion emission peak centering around 550 nm in green light range is excited under 800 nm light excitation, which is correlated with the 4 S 3/2 → 4 I 15/2 transition.
研究领域:
材料科学
·
无机非金属材料
·
功能陶瓷
·
光电子学
·
固体化学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·
IF 3
Yan Shaohan,Wang Lijing,Shan Pengnian,Lin Xue,Shi Weilong
Against the backdrop of increasing energy shortages, hydrogen energy has garnered significant attention as a green and clean alternative energy source. To fully exploit a broader portion of the solar spectrum, we designed a Y 2 O 3 :Yb 3+ , Er 3+ /ZnIn 2 S 4 (denoted as YYE/ZIS) composite photocatalyst with a well-defined loaded structure of coating Y 2 O 3 :Yb 3+ , Er 3+ nanoparticles on the ZnIn2S4 micro-flowers, capable of efficiently utilizing near-infrared (NIR) light through an up-conversion mechanism. The introduction of Yb 3+ and Er 3+ ions endows the Y 2 O 3 with excellent up-conversion luminescence properties, enabling the effective conversion of lowenergy NIR photons into high-energy visible light over YYE/ZIS composite, which subsequently activates the ZIS component for NIR-driven photocatalytic hydrogen production. Photoelectrochemical characterizations reveal that the loaded structure significantly facilitates efficient charge separation and migration at the interface, while markedly suppressing the recombination of photogenerated electron-hole pairs, thereby enhancing the overall photocatalytic performance. Remarkably, the catalyst demonstrates excellent NIR-response hydrogen evolution performance (16.3 μmol·g -1 ·h -1 ) even in the absence of noble metal co-catalysts, such as Pt, achieving a hydrogen production rate approximately 10.9 times higher than that of pristine ZIS. This work proposes a novel approach for constructing up-conversion-enabled composite photocatalysts with rationally engineered interfacial architectures.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 15
·1-12
·
IF 2.8
Li Meiling,Cao Yongze,Cheng Lihong,Fan Yuhan,Wang Yichao,Li Xiangping,Zhang Xizhen,Chen Baojiu
A series of Er 3+ /Yb 3+ co-doped NaY(WO 4 ) 2 (NYWO) phosphors are prepared by molten salt synthesis (MSS) with Na 2 SO 4 as solvent. The holding temperature, holding time, and solvent-to-solute mass ratio parameters are regulated. The structure, morphology, and luminescence properties of the samples were tested by XRD, SEM, and fluorescence spectrometers, respectively. The lamellar sample is prepared at 900℃ for 5 h when solvent-to-solute is 3, which has the highest pure green upconversion luminescence (UCL) intensity under 980 nm laser excitation. It is demonstrated that the UCL intensity of the samples prepared by MSS is higher than that of solid sintered samples. The maximum absolute sensitivity (S A ) and relative sensitivity (S R ) are 0.012184 K⁻ 1 at 507 K and 0.01102 K⁻ 1 at 303 K, respectively. These materials can be used for pure green luminescence displays and temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）