Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 22
·6728-6743
·
IF 6.641
Xuyang Zhang,Ruili Zhang,Lili Hu,Jinjun Ren
A series of 16BaF2–(84 − x)NaPO3–xYF3–yErF3 (x = 0, 12, 24, 36, and 48 mol%; y = 0.1, 0.5, and 1 mol%) glasses were prepared via the conventional melt-quenching method and subsequently heated to synthesize glass ceramics containing Er3+-doped Na5Y9F32 crystals. The structures of glasses and glass ceramics were characterized by multiple advanced one- and two-dimensional solid-state magic angle spinning nuclear magnetic resonance (MAS NMR) techniques. At the atomic level, multiple phosphorus species Qn (n = 0, 1, and 2) were resolved. Here, the value n denotes the number of P–O–P bonds, which can be quantified by 2D J-resolved spectroscopy. The connectivity between F− ions and cations was detected by the rotational echo double resonance (REDOR) and the J-coupling based heteronuclear multiple quantum coherence (HMQC) method. With the increase of YF3 content, the phosphate network depolymerized gradually. 31P and 19F MAS spectra, as well as 23Na {31P} and 23Na {19F} REDOR results, consistently proved that Y3+ ions, replacing partial Ba2+ and Na+ ions, aggregated around phosphorus tetrahedrons [PO4]3−, whereas partial Ba2+ and Na+ ions moved away from [PO4]3− to bond with F− ions and formed Y–F⋯Na and Ba–F⋯Na linkages. All cations could exist as oxygen and fluorine complex ligand units M(OxFy), besides single oxygen ligand units M(Ox+y), where M represents cations in glasses. When YF3 content reached 48% by mole, micro-regions enriched in Y–F⋯Na linkages were formed, which promoted the crystallization. 31P MAS spectra indicated that the crystallization of Na5Y9F32 crystals has not affected the local structure of phosphorus species. Intensive upconversion luminescence can be observed in the fluoro-phosphate glass ceramics containing Er3+:Na5Y9F32 crystals. On the basis of these complementary evidences from solid-state NMR experiments and luminescence spectra, a novel structure evolution model during crystallization is developed.
✓ 已验证
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2026
·
IF 3.5
Asmae Mimouni,Mohammed F. Alotiby,Hesham Y. Amin,M.S. Sadeq
Understanding the composition–structure–property correlation in glasses is essential for tailoring their optical and radiation shielding performance. In this work, we introduce an investigation of nickel-doped sodium borosilicate glasses with fixed NiO content (2 mol%) by substituting SiO 2 for B 2 O 3 , providing new insight into the role of mixed network formers in tuning optical, nonlinear optical, and gamma-ray shielding properties. The glass samples were synthesized via the conventional melt-quenching method. Optical absorption spectra exhibited characteristic ligand-field transitions of Ni 2+ ions. Also, there is a noticeable blue shift of the absorption edge with increasing SiO 2 content. Consequently, the optical band gap increased from 3.28 to 3.44 eV, reflecting enhanced network polymerization and stronger Si–O bonding. Moreover, the nonlinear optical parameters, including nonlinear refractive index and third-order nonlinear susceptibility, decreased with SiO 2 enrichment, which is attributed to reduced electronic polarizability arising from increased network rigidity. Furthermore, radiation shielding parameters—including mass and linear attenuation coefficients, half-value layer, mean free path, and effective atomic number—showed systematic composition-dependent variation. Notably, improved attenuation efficiency with increasing SiO 2 content is correlated with increased density and modified structural packing of the glass network. Among the investigated compositions, the SiO 2 -rich sample (NaBNiSi-40) exhibited superior shielding efficiency and a lower half-value layer compared to conventional shielding materials. These findings demonstrate that controlled manipulation of mixed glass formers offers an effective strategy for designing multifunctional materials with optimized optical and radiation shielding performance.
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2014
·
IF 1.716
J. Yuan,W.C. Wang,D.D. Chen,M.Y. Peng,Q.Y. Zhang,Z.H. Jiang
Enhanced 1.8 μm emission from Tm 3+ by Yb 3+ sensitization and bubbling in tungsten tellurite glasses has been demonstrated under the excitation of a 976 nm laser diode . Radiative properties such as spontaneous emission probabilities, radiative lifetimes and fluorescence branching ratios along with absorption and emission cross sections have been calculated from the absorption spectra . The influences of Yb 3+ concentration, Tm 3+ concentration, and bubbling time on spectroscopic properties have been thoroughly investigated. It is found that with increasing the bubbling time to 35 min, OH − content deceases sharply while 1.8 μm emission intensity improves greatly and 3 F 4 level lifetime prolongs to 1.57 ms close to radiative time. After 35 min, they change very little due to almost reaching the dynamic balance. The strength of interaction between Tm 3+ and OH − is determined. The energy transfer mechanism between Yb 3+ and Tm 3+ is proposed by photoemission spectroscopy and lifetime measurement. The energy transfer coefficients have been analyzed by the extended spectral overlap method and hopping model. Large ratio of the forward energy transfer from Yb 3+ to Tm 3+ to the backward one (223) and high energy transfer efficiency (97%) from Yb 3+ to Tm 3+ ensure efficient 1.8 μm emission. Hence, Yb 3+ sensitization and the reduction of OH − content could be expected to open up a possibility to achieve high efficient 2.0 μm lasing from Tm 3+ under a 976 nm LD pump.
研究领域:
光学材料
·
激光物理
·
固体激光器
·
光谱学
·
无机非金属材料
·
光子学
·
稀土发光材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Qin Wang,Yao Tong,Meiting Yang,Hangtao Ye,Xiaojuan Liang,Xin Wang,Weidong Xiang
In the current situation of energy shortages, saving energy and reducing consumption are undoubtedly valid methods to relieve the pressure on resources. CsPb X 3 ( X = Cl, Br, and I) perovskites as star inorganic materials have drawn growing attention owing to their unique properties, making them suitable for applications such as light-emitting diodes (LEDs), solar cells, photodetectors, or lasers. This work presents zinc oxide (ZnO) induced self-crystallized CsPb(Br/I) 3 perovskite with a 26% photoluminescence quantum yield (PLQY) prepared by the traditional melt-quenching method. Furthermore, the full width at half maximum (FWHM) (34–44 nm) can be regulated by the ZnO content. In addition, as a downconverter, CsPb(Br/I) 3 perovskite nanocrystals (NCs) realize a bright red backlight that covers ≈ 94% Rec. 2020 standards in the CIE 1931 color space and 126% of National Television System Committee (NTSC). This finding undoubtedly confirms an effective path for fabricating perovskite materials in a green, low-cost, and time-saving way, enriching the knowledge of glass crystallization mechanisms and promoting their applications in wide color gamut backlights.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Chuncheng Zhang,Chaomin Zhang,Chao Yun
In this paper, Er 3+ /Ho 3+ co-doped fluoride glasses were prepared by the high temperature melt-quenching technique. Pumped by the 980 nm LD , as a result of the emission spectra overlapping of Er 3+ and Ho 3+ ions, a broadband mid-infrared emission band from 2530 to 2950 nm with a full width at half maximum of the synthetic fluoride glasses near 231 nm was obtained, which exist latent application in wide band tunable mid-infrared fiber laser. Furthermore, the intense 4.1 μm mid-infrared fluorescence (3600–4400 nm) was obtained and the FWHM was 320 nm. The up-conversion emission peaks around 525, 546 and 660 nm, near-infrared emissions at 1.2 and 1.5 μm together with mid-infrared fluorescence around 2.0 μm was observed in Er 3+ /Ho 3+ co-doped fluoride glass. Moreover, the relevant energy transfer processes were discussed in detail based on the emission spectrum and the energy level transition processes. The results indicate that the fabricated Er 3+ /Ho 3+ co-doped fluoride glasses exist prominent emission features for fiber laser gain medium.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Yuan Jian,Wang Weichao,Ye Yichen,Deng Tingting,Ou Deqian,Cheng Junyang,Yuan Shengjin,Xiao Peng
The effects of substitution of BaF2 for BaO on physical properties and 1. 8 μm emission have been systematically investigated to improve spectroscopic properties in Tm3+ doped gallium tellurite glasses for efficient 2.0 μm fiber laser. It is found that refractive index and density gradually decrease with increasing BaF2 content from 0 to 9 mol.%, due to the generation of more non-bridging oxygens. Furthermore, OH− absorption coefficient (αOH) reduces monotonically from 3.4 to 2.2 cm−1 and thus emission intensity near 1.8 μm in gallium tellurite glass with 9 mol.% BaF2 is 1.6 times as large as that without BaF2 while the lifetime becomes 1.7 times as long as the one without BaF2. Relative energy transfer mechanism is proposed. The maximum emission cross section and gain coefficient at around 1.8 μm of gallium tellurite glass containing 9 mol.% BaF2 are 8.8 × 10−21 cm2 and 3.3 cm−1, respectively. These results indicate that Tm3+ doped gallium tellurite glasses containing BaF2 appear to be an excellent host material for efficient 2.0 μm fiber laser development.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 1
·432-443
·
IF 3.094
Weirong Wang,Guanliang Yu,Ruibin Wang,Chun Jiang
Here, we select simple Er 3+ -doped tellurite glass as model system to systematically explore the up-conversion, down-shifting mechanisms with different excitations (980 and 447 nm), respectively. We observe for the first time, to the best of our knowledge that tunable photo-luminescence occurs from green to red and NIR region, rather than merely from the long-accepted green to red region. Direct evidence of selective energy transfer mechanism is expounded in detail, and its potential applications are demonstrated. In addition, we provide evidence that the cross-relaxation process between dopant ions can enhance photo-luminescence in Er 3+ doped tellurite glasses with high dopant concentrations, whereas the crucial reason for emission decrease is the energy loss long-distance energy migration. These fundamental insights into the photophysical processes in heavily doped photonic glasses will broaden the applications of rare-earth-doped materials ranging from optical communications to medical imaging.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 13
·2506-2512
·
IF 5.066
X. Y. Liu,H. Guo,Y. Liu,S. Ye,M. Y. Peng,Q. Y. Zhang
The design of white-light luminescent materials with excellent thermal stability is still a challenge in the field of white-light emitting diode (W-LED) application. In this paper, a pair of novel Bi3+/Mn2+ ions co-doped into white-emitting borosilicate glasses were successfully prepared using a melt-quenching method. Their luminescence properties were evaluated using transmission spectra, photoluminescence excitation and emission spectra in the temperature range of 300–573 K, and lifetime decay curves. Upon excitation with a ultraviolet (UV) light, the co-doped glasses exhibit intense tunable emitting color between the blue and the orange-red region due to efficient energy transfer from Bi3+ to Mn2+, and a perfect white light emission is realized by appropriately adjusting the Mn2+ concentrations. Furthermore, the Bi3+ singly doped glass presents good thermal stability, showing about 72.3% of the observed room temperature (300 K) emission intensity at 423 K, while the thermal stability becomes lowered after Mn2+ ions are incorporated into the singly doped sample, attributed to serious thermal quenching from Mn2+. This work may help to better understand the interactions between Bi3+ and transition metal ions, and it might also be helpful in the future design of organic resin-free W-LEDs.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2024
·
IF 2.7
Biao Chen,Fei Hu,Yinghui Zhao,Yuanhaobo Yang,Bin Yan,Qin Yang,Yingchun Gu,Sheng Chen
To pursuit advancing electrochromic technology, the preparation of a novel hierarchical-porous NiO x -decorated ITO transparent conductive electrode was developed through the vapor-assisted conversion and subsequent calcination processes. The modified transparent electrode exhibited advantages in the electrodeposition of conductive polymer films, which significantly enhanced electrochromic cycling stability. Moreover, the complementary electrochromic device based on NiO x -decorated ITO transparent electrode was fabricated, demonstrating rapid response time (1.75 s for coloration and 0.87 s for bleaching), high optical contrast (53.4 %), and remarkable cycling stability (90 % optical contrast retention over 2000 cycles). This finding holds prominent potential for applications in related fields.
✓ 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.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 26
·47599-47610
·
IF 5.6
Weijie Zhu,Weichao Wang
The rapid expansion of data-intensive technologies such as 5G, AI, and cloud computing is pushing optical communication systems to their limits, necessitating the development of advanced materials to extend bandwidth into the L- and U-bands. Fluoro-sulfo-phosphate (FSP) glasses, owing to their multi-anionic compositions and tunable network structures, offer a promising platform for next-generation broadband fiber amplifiers. In this work, a mixed-cation approach employing K + and Ba 2+ is employed to manipulate the local structural environment and enhance glass-forming ability, lifetime (8.7–9.22 ms for Er-doped, ∼10 ms for Er 3 + /Yb 3+ co-doped), emission cross-section (0.59-0.70 × 10 − 20 cm 2 ), energy transfer efficiency (∼85 %), and thermal quenching resistance. Despite their similar sizes and electronegativities, K + and Ba 2+ exhibit contrasting field strengths and polarizabilities, enabling a controlled balance between network connectivity and local disorder. Thermodynamic modeling and experimental results confirm that the introduction of mixed cations significantly broadens the glass-forming region. The addition of AlF 3 further strengthens the network, allowing for the preparation of stable K/Ba-FSP glasses with improved mechanical, thermal, and chemical properties. Spectroscopic analysis reveals a substantial enhancement in L-band emission efficiency and gain characteristics, with performance improvements ranging from 30 % to 150 % over conventional glass hosts. These findings position K/Ba-FSP glasses as a robust and high-performance candidate material system for broadband rare-earth-doped fiber amplifiers and lasers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Ke Liang,Lili Hu,Jinjun Ren
Mixed-network former glasses have drawn considerable attention for their ability to combine the advantages of different glass formers. However, chemical incompatibilities among formers often lead to phase separation, hindering practical applications. In this work, glasses with the composition xAl2O3-(80-x)NaPO3-20SiO2 (x = 0, 10, 15, 20, 25 mol %) were synthesized via the melt-quenching method. The atomic-scale structure of these glasses was elucidated using advanced solid-state nuclear magnetic resonance (SSNMR) techniques, including single pulse Magic Angle Spinning (MAS), 31P refocused Incredible Natural Abundance Double Quantum Transfer Experiment (refocused INADEQUATE), Double-Quantum based Dipolar Recoupling Effects Nuclear Alignment Reduction (DQ-DRENAR), 27Al{31P} Rotational Echo Double Resonance (REDOR), 31P{27Al} Rotational Echo Adiabatic Passage Double Resonance (REAPDOR). The results reveal that the 80NaPO3-20SiO2 glass predominantly contains homonuclear linkages (P–O–P, Si–O–Si), while heteronuclear P–O–Si bonds are less favored, leading to Na+ ions enrichment in phosphate-rich regions and evident phase separation. Incorporating Al2O3 promotes P–O–Al bond formation; when the average number of Al atoms bonded per phosphorus exceeds 2, further alumina incorporation promotes the formation of Si–O–Al linkages. Concurrently, Na+ ions begin to migrate from the vicinity of phosphate tetrahedra [PO4] toward silicate tetrahedra [SiO4]. This compositional evolution facilitates the progressive formation of Si–O–Al–O–P linkages, which effectively suppresses phase separation and yields a more homogeneous glass structure.
✓ 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）