JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
MingXing Li,Fangtian You,Chunjun Liang,Zhiqun He
A new temperature measurement strategy based on the luminescence of Ce 3+ and Tb 3+ doped YBO 3 was proposed. Dual emissions of Ce 3+ and Tb 3+ have different thermal dependencies, which can be used to overcome those limitations such as low signal discriminability and large measurement error. A series of Ce 3+ and/or Tb 3+ doped YBO 3 samples were synthesized by hydrothermal method , and the influences of temperature on the photoluminescence (PL) intensity of Ce 3+ 5d-4f transition and Tb 3+ 4f-4f transition were discussed in detail. Compared with the single emission of YBO 3 :1.0%Ce 3+ , fluorescence intensity ratio (FIR) variation of Ce 3+ blue emission and Tb 3+ green emission in YBO 3 :1.0%Ce 3+ , 1.0%Tb 3+ has been studied as a function of temperature in the range of 288–328 K. The absolute sensitivity of YBO 3 :1.0%Ce 3+ , 1.0%Tb 3+ was 1.18 %K −1 , higher than that of YBO 3 : 1.0%Ce 3+ (0.70 %K −1 ). The results suggest that YBO 3 :Ce 3+ , Tb 3+ is a good candidate as optical thermometry in the physiological range.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 21
·期 2
·339-347
·
IF 3.304
Wenpeng Xia,Yufeng Zhang,Jie Xiong,Shanshan Hu,Jie Yu,Yanfei Zhang,Yuxin Wan,Jun Yang
A series of BaMgF4:Ce3+/Tb3+/Eu3+ phosphors were successfully prepared via a facile hydrothermal process. X-ray diffraction (XRD), energy dispersive spectrometry (EDS), scanning electron microscopy (SEM), n-UV–UV-vis photoluminescence (PL) and fluorescence decays were employed to investigate the structure, composition, morphology, luminescence properties and energy transfer processes. The as-prepared BaMgF4 phosphors exhibit a rod-like morphology and the size of the product can be effectively regulated by changing the amount of NH4F in the original solution. Under n-UV–UV light excitation, the Ce3+, Tb3+ and Eu3+ singly-doped BaMgF4 phosphors all show good characteristic luminescence; the Ce3+–Tb3+ and Tb3+–Eu3+ co-doped BaMgF4 phosphors both show tunable emission colors from blue (green) to green (orange-red) because of the energy transfer of Ce3+ → Tb3+ and Tb3+ → Eu3+, respectively. Moreover, the efficient energy transfer from Ce3+ (Tb3+) to Tb3+ (Eu3+) ions in the co-doped samples was confirmed by investigating the excitation/emission spectra and decay lifetimes. The results indicate that the phosphors may be potentially used as single-component multi-color phosphors for white light-emitting diodes.
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 EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Wenhao Li,Zexuan Sui,Chunli Fan,Ci Wang,Yao Zhu,Jing Ren,Jianzhong Zhang
Nano-glasses are next-generation scintillators combining favorably the merits of both scintillator crystals and glasses. Here, a new nano-glass scintillator is prepared embedding CsGd 2 F 7 :Ce 3+ nanocrystals (NCs). The microscopic morphology, particle size, and distribution of the NCs are studied by high resolution transmission electron microscopy . Significantly enhanced radioluminescence efficiency is obtained in the nano-glasses. The largest integrable intensity of X-ray excited luminescence is 316% of the standard Bi 4 Ge 3 O 12 (BGO) crystal. A well-resolved full-energy peak with an energy resolution of 17.4% is registered for the 662 keV gamma rays, and the light yield is determined to be 827 ± 8 ph/MeV. The nano-glass scintillators exhibit good radiation hardness and thermal stability. As a proof of concept, an X-ray imaging system of a good resolution is built on the nano-glass scintillators.
研究领域:
材料科学
·
光学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2011
·
IF 7.883
Yunlu Dai,Cuimiao Zhang,Ziyong Cheng,Ping’an Ma,Chunxia Li,Xiaojiao Kang,Dongmei Yang,Jun Lin
In this study, we design a controlled release system based on CaF 2 :Ce 3+ /Tb 3+ -poly(acrylic acid) (PAA) composite microspheres , which were fabricated by filling the pH-responsive PAA inside CaF 2 :Ce 3+ /Tb 3+ hollow spheres via photopolymerization route. The CaF 2 :Ce 3+ /Tb 3+ hollow spheres prepared by hydrothermal route possess mesoporous structure and show strong green fluorescence from Tb 3+ under UV excitation. Doxorubicin hydrochloride (DOX), a widely used anti-cancer drug, was used as a model drug to evaluate the loading and controlled release behaviors of the composite microspheres due to the good biocompatibility of the samples using MTT assay . The composite carriers provide a strongly pH-dependent drug release behavior owing to the intrinsic property of PAA and its interactions with DOX. The endocytosis process of drug-loaded microspheres was observed using confocal laser scanning microscopy (CLSM) and the in vitro cytotoxic effect against SKOV3 ovarian cancer cells of the DOX-loaded carriers was investigated. In addition, the extent of drug release could be monitored by the altering of photoluminescence (PL) intensity of CaF 2 :Ce 3+ /Tb 3+ . Considering the good biocompatibility, high drug loading content and pH-dependent drug release of the materials, these hybrid luminescent microspheres have potential applications in drug controlled release and disease therapy.
研究领域:
生物材料学
·
药理学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 24
·6584-6595
·
IF 7.779
Quwei Ni,Jiansheng Huo,Jiachun Liu,Haojun Yan,Qijian Zhu,Jieying Li,Chenggang Long,Qianming Wang
The exploitation of functional phosphors possessing a variety of advantages, including narrow-band emission, fast response to near-ultraviolet (n-UV)/blue light excitation, high quantum efficiency, and low thermal quenching, is essentially important for the wide-color-gamut display backlights. It is the first example to introduce Ce3+–Tb3+ pairs into the Ca3Lu2Si6O18 (CLSO) host for identifying a novel green-emitting material with all the mentioned properties. The efficient Ce3+ → Tb3+ energy transfer process was monitored in the CLSO host via dipole-quadruple interactions between Ce3+ and Tb3+ ions, leading to a wide excitation band in the n-UV region and bright green light with a main sharp emission band at 543 nm. Moreover, the composition-optimized sample has been found to achieve extremely high internal quantum efficiency (close to unity) and excellent thermal stability (lost only 13.2% of the initial emission intensity at 150 °C), which are more favorable than those shown by a vast majority of green-emitting phosphors reported recently. The prototype pc-WLED fabricated using the as-prepared sample as the green component exhibited a high luminous efficiency (LE) of 31.48 lm W−1 and a wide color gamut of 91.2% (area ratio) National Television Standards Committee (NTSC) 1953 standard. These attractive properties verified that the proof of concept concerning the designed sample will be a promising candidate to substitute the current green color phosphors for wide-color-gamut display backlights.
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 Chemistry C
·
2024
·Vol. 12
·期 9
·3221-3227
·
IF 5.7
Yuying Liu,Kai Han,Shihao Zhao,Xinquan Zhou,Song Gao,Yexin Wang,Zhiguo Xia,Shangda Jiang
Rare-earth Ce3+-doped scintillators are attracting considerable attention for X-ray detection. However, large-area and fast scintillation screens using monodispersed scintillator nanocrystals (NCs) remain a challenge in X-ray imaging. Herein, we fabricated Ce3+-doped alkaline-earth metal sulfide NCs by a high-temperature co-precipitation method. The as-prepared SrS:Ce3+ and CaS:Ce3+ NCs show a bright blue-green emission originating from the d–f transition of Ce3+, and the NCs exhibit good X-ray scintillation performance with a detection limit as low as 0.66 μGyair s−1 and excellent anti-irradiation stability. We further successfully fabricated a homogeneous hybrid scintillation film by embedding scintillator NCs in poly(methyl methacrylate) (PMMA) and demonstrated the imaging effect of the film as an X-ray screen. This work highlights the potential of Ce3+-doped scintillator NCs for efficient X-ray detection.
研究领域:
材料科学
·
医学影像学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Yanzhen Yin,Maochen Zhu,Yue Zhang,Chen Hu,Zhen Wang,Yang Che,Jingyao Lu,Ruyi Sun,Jiaqi Zhao,Bing Teng,Jianhong Li,Shijia Sun,Degao Zhong
High quantum efficiency and thermal stability have always been the goals to pursue and challenges for lighting application. In this work, sunlight-like white emission has been achieved in a new prepared single phased Rb 2 CaP 2 O 7 : 0.005Ce 3+ , 0.01Eu 2+ phosphor, which exhibits high internal quantum efficiency (IQE = 74.36%), external (EQE = 56.77%) quantum efficiency and excellent thermal stability. Based on the broadband emission from 4f-5d transitions of Ce 3+ /Eu 2+ ions and high energy transfer efficiency of Ce 3+ →Eu 2+ (measured up to 60%), the extremely wide color-tunable emission from blue-violet to white and then to orange-yellow is realized in Rb 2 CaP 2 O 7 : 0.005Ce 3+ , xEu 2+ phosphors. Moreover, a prototype WLED device is packaged by combing the prepared Ra 2 CaP 2 O 7 : 0.005Ce 3+ , 0.01Eu 2+ white phosphors with an UV LED chip (λ = 310 nm), and the obtained WLED emits bright sunlight-like white light with color coordinates of (0.377, 0.324). The correlated color temperature (CCT) and the color rendering index (CRI) value of the WLED are 3208 K and 88.4, respectively. These results can provide effective guidance for the design of color-tunable single-phase white phosphors with high luminous efficacy and thermal stability.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 5
·1081
·
IF 3.2
Xuezhuan Yi,Qinglin Sai,Yanna Tian,Renjie Jiang,Mingqin Li
This paper demonstrates the application of eutectic welding to Ce3+:YAG transparent ceramics for reliable detection and imaging of UV emission, particularly focusing on demanding conditions, such as high repetition rate, high energy, and high vacuum. A series of Ce3+:YAG transparent ceramics with different Ce3+doping concentrations (0.1 at%, 0.3 at%, 0.5 at%, and 1.0 at%) were prepared via vacuum sintering. Their crystal microstructure, luminescence properties, transmittance, and fluorescence lifetime were studied. It was found that the optimal Ce3+doping concentration is 0.3 at%. The measured ultraviolet-to-visible energy conversion efficiency of the 0.3 at% Ce3+:YAG transparent ceramics with a thickness of 1.0 mm is 3.9%. Compared with silicone encapsulated Ce3+:YAG transparent ceramic samples, the eutectic-soldered samples exhibited excellent resistance to temperature quenching of the luminescence, which indicates that eutectic welding can effectively improve the fluorescence performance of Ce3+:YAG transparent ceramics for the application of deep ultraviolet light detection.
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
Crystals
·
2024
·Vol. 14
·期 5
·431
·
IF 2.4
Zhenggang Zou,Jiaolin Weng,Chun Liu,Yiyang Lin,Jiawei Zhu,Yijian Sun,Jianhui Huang,Guoliang Gong,Herui Wen
Inorganic scintillation crystals have been widely used in applications of high-energy physics, nuclear medical imaging, industrial nondestructive inspection, etc. In this work, a single crystal Ba3Y(PO4)3(BYP) with 1.0 at% Ce3+-doping concentration was first grown by the Czochralski method, and the electronic structure was calculated using first principles based on density functional theory. In addition, a series of Ce3+-doped BYP phosphors were synthesized, and the fluorescence emission under UV excitation was measured through low-temperature spectroscopy, containing double-peaked emission from 5d–4f transition and self-trapped exciton recombination. A comparison of the UV and X-ray-excited fluorescence spectra reveals the existence of oxygen vacancies as well as F+ centers in the crystal. The air annealing of the crystal effectively reduces the thermoluminescence defects but reduces the emission intensity under UV or X-ray excitation. The BYP:Ce crystal shows a fast decay lifetime of 15.5 ns, and the fast component is as short as 8 ns. The results show that the Ce3+-doped BYP crystal has potential as a kind of scintillator with fast decay properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2018
·Vol. 7
·期 12
·R215
·
IF 1.808
Quan Dong,Fengli Yang,Jun Cui,Hong Ming,Fu Du,Jiaqing Peng,Yabin Tian,Shaohua Yang,Xinyu Ye
A series of γ-AlON: Ce3+, Mn2+ phosphors were prepared via a high-temperature solid-state reaction. The phase formation and morphology, photoluminescence excitation and emission spectra, absorption spectra, lifetime, and thermal stability were investigated in detail. The γ-AlON: Ce3+, Mn2+ phosphor showed two emission bands under 285 nm excitation. The first broad band at 400 nm was attributed to Ce3+ ion emission, and the narrow band found at 517 nm was assigned to the Mn2+ ions. The critical distance of energy transfer from Ce3+ to Mn2+ has been calculated according to the concentration quenching method. The mechanism of energy transfer from Ce3+ to Mn2+ was of the resonance type and occurred via a dipole − dipole interaction. After doping Ce3+ in the γ-AlON matrix, the absorption, internal quantum, and external quantum efficiencies of γ-AlON: Ce3+, Mn2+ can be increased to 68.8%, 60.9%, and 41.9%, respectively. Furthermore, γ-AlON: Ce3+, Mn2+ exhibited superior thermal stability, with the emission intensity measured at 150°C maintaining 99% of the maximum emission intensity.
研究领域:
材料科学
·
光学
·
固体物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiumei Guo,Yanzhi Zhang,Xingyang Peng,Ruirui Cui,Jun Zhang,Xiang Guo
The demand for efficient plant lighting has driven the search for high-performance blue-emitting phosphors, as blue light (400–500 nm) is crucial for photosynthesis, protein synthesis, and biomass accumulation. However, existing phosphors often lack optimal spectral coverage and thermal stability. This study presents a novel garnet-type blue phosphor, Ca 3 Gd 2 Si 3 O 12 :Ce 3+ , synthesized via solid-state reaction. Under 356 nm excitation, it emits intense blue light (peak at 411 nm) with a broad FWHM of 80.91 nm, outperforming commercial phosphors like BaMgAl 10 O 17 :Eu 2+ . Its emission closely matches chlorophyll absorption, achieving overlap efficiencies of 84.14 % (chlorophyll a ) and 94.81 % (chlorophyll b ). The phosphor also exhibits excellent thermal stability (activation energy: 0.296 eV; T 50 = 387 K). Additionally, when integrated into WLEDs with red/green phosphors, Ca 3 Gd 2 Si 3 O 12 :Ce 3+ delivers warm white light (CCT = 4512 K, CRI = 92.3), demonstrating versatility in both plant growth and high-quality lighting applications. LEDs with this study's blue phosphor have higher CRI than ordinary lighting LEDs (reducing blue light harm) and a broad spectrum, better suiting plant growth compared to traditional blue plant LEDs.
研究领域:
材料科学
·
光电子学
·
植物生物学
·
固态照明
·
应用物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 2
·809-818
·
IF 3.094
Zhigang Sun,Ziyun Chen,Mengyao Wang,Bin Lu
We first report the novel Ce 3+ -activated and Lu 3+ -stabilized gadolinium aluminate garnet (GAG) transparent ceramics derived from their precipitation precursors via a facile co-precipitation strategy using ammonium hydrogen carbonate (AHC) as the precipitant. The resulting precursors in liquid phase were substantially homogeneous solid solutions and could directly convert into sinterable garnet powders via pyrolysis. Substituting 35 at.% of Lu 3+ for Gd 3+ was effective to stabilize the cubic GAG garnet structure and transparent (Gd,Lu) 3 Al 5 O 12 :Ce ceramics were successfully fabricated by vacuum sintering at 1715°C. The ceramic transparency was improved by optimizing the particle processing conditions and the best sample had an in-line transmittance of ~70% at 580 nm (Ce 3+ emission center) and over 80% in partial infrared region with a fine average grain size of ~4.5 μm. Transparent (Gd,Lu) 3 Al 5 O 12 :Ce ceramics have a short critical wavelength (<200 nm) and a maximal infrared cut-off at ~6.6 μm. Both the (Gd,Lu) 3 Al 5 O 12 :Ce phosphor powder and the transparent ceramic exhibited characteristic yellow emission of Ce 3+ with strong broad emission bands from 490 to 750 nm upon UV excitation into two groups of broad bands around 340 and 470 nm. The photoluminescence and photoluminescence excitation intensities as well as the quantum yield were greatly enhanced via high-temperature densification. Both the phosphor powder and ceramic bulk had short effective fluorescence lifetimes.
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
危险品化学品经营许可证（带存储）