Laser & Photonics Reviews
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2025
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IF 10
Pei Jiang,Yi Zhang,Songchao Bai,Pengchao Shen,Meng Zhou,Baohong Tian,Gang Yang,Mengmeng Dai,Yongsheng Zhu
Lead-free halide double perovskites (DPs) have attracted growing attention owing to their eco-friendly composition and remarkable optoelectronic performance. However, it remains a challenge to develop DPs that simultaneously achieve high photoluminescence quantum yield (PLQY), excellent stability, and multifunctional applications. Herein, rare-earth-based DPs Cs 2 NaHoCl 6 single crystals are successfully synthesized, which achieve the optimized red and near-infrared (NIR) emissions of Ho 3+ through doping Ce 3+ ions. Benefiting from strong absorption of Ce 3+ and efficient energy transfer to Ho 3+ under 340 nm excitation, the PLQY remarkably increases from 3.67% to 92.56%, which are confirmed by experimental analyses and density functional theory calculations. Meanwhile, taking advantage of abnormal anti-thermal quenching luminescence of Ho 3+ and highly efficient thermal response capability of Stark levels of 5 F 5 within the temperature range of 80–500 K, the prepared DPs provide a distinctive platform for luminescence thermometer with a superior relative sensitivity value of 5.19% K −1 at 80 K and red-NIR light-emitting diode. These results not only establish Ce 3+ as a generalizable strategy for optimizing luminescence in rare-earth-based DPs, but also open new avenues for their multiple potential applications in solid-state lighting, temperature sensing, night vision imaging as well as plant growth illuminating.
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2022
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IF 7.129
He Mei,Jianping Wang,Xiaolei Zhu,Juan Sun,Wei Shi,Huili Wang,Shugen Qu,Xuedong Wang
A novel ratiometric fluorescent probe was constructed for sensitive assay of hydrogen peroxide (H 2 O 2 ) and glucose, which utilized the synergistically enhanced effects of Ce 3+ and Fe 2+ on copper nanoclusters (CuNCs) and coumarin. In the CuNCs-Ce 3+ /Fe 2+ -coumarin system, Ce 3+ triggered the aggregation-induced emission phenomenon of CuNCs, and Fe 2+ catalyzed the Fenton reaction to efficiently yield hydroxyl radical (•OH). In the presence of H 2 O 2 , the 625-nm red fluorescence of CuNCs was sharply quenched owing to the oxidation of CuNCs to Cu(II) by •OH, but the 460-nm blue fluorescence of 7-hydroxycoumarin from the oxidation of coumarin by •OH dramatically increased. Based on the reversible changes in two fluorescence signals, a satisfactorily ratiometric probe was constructed for H 2 O 2 assay with a detection limit (LOD) of 0.6 μM accompanied by a visual color variation from red to blue. For glucose assay, this ratiometric probe gave a linear range of 3.2–160 μM and LOD of 0.96 μM owing to the oxidization of glucose to yield H 2 O 2 in the presence of glucose oxidase and O 2 . Overall, the newly developed ratiometric probe shows a great prospect in real applications for visual assay of H 2 O 2 and glucose by our naked eyes.
研究领域:
分析化学
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生物医学
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高影响因子
JOURNAL OF LUMINESCENCE
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2017
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IF 2.686
Haoyue Hao,Hongyu Lu,Guanghong Ao,Yinglin Song,Yuxiao Wang,Xueru Zhang
The nearly pure green and red emissions of Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 were realized by tri-doping Eu 3+ and Ce 3+ , respectively. The Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 powder, radiating intense green and red emissions, was prepared by a typical sol-gel method. Under the excitation of 980 nm laser, the red-to-green ratio was tuned from 0.2 to 4 as the concentration of Eu 3+ changed from 6 to 0 mol%, attributed to the energy transfer processes between Ho 3+ and Eu 3+ . Meanwhile, the red-to-green ratio altered from 4 to 20 as the concentration of Ce 3+ changed from 0 to 20 mol% via the cross relaxing processes between Ho 3+ and Ce 3+ . The prepared phosphors, possessing large tuning range of red-to-green ratio and resisting high temperature, can be potentially applied to colorful display and solid-state lighting.
研究领域:
材料科学
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光学材料
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光子学
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固态照明
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显示技术
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高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Li Xu,Xidong Wang,Luhan Wang,Shuyang Bao,Yu Wang,Xiaojuan Liang,Weidong Xiang
Inorganic fluorescent glass films have been widely considered in the field of high power laser lighting because of their excellent comprehensive properties as fluorescent conversion materials. Herein, we adjust the optimum sintering temperature to prepare a series of La3Si6N11:Ce3+ phosphor-in-glass films (LSN PiFs) with excellent optical properties on a single sapphire structure. The prepared LSN PiF has ultrahigh internal quantum efficiency (IQE) (98%) and excellent thermal stability. The thermal conductivity at room temperature can reach 9.8 Wm–1 K–1. When the temperature is 100 °C, the fluorescence intensity can still be maintained. The LSN:Ce phosphor particles did not react with the glass matrix and retained the original luminescence properties. Moreover, by further adjusting the concentration and thickness of LSN PiF, the luminous flux and luminous efficiency of LSN PiF under optimal conditions can reach 1071.73 and 207.58 lmW–1 under the excitation of 460 nm, which is the optimal result reported so far. In addition, the color rendering index (CRI) and low color temperature (CCT) are 64.05 and 5612.6 K, respectively, and the color coordinates are all close to the white light region. All the results show that LSN PiF has great application prospects in the high quality and high brightness laser lighting field.
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高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Zengsen Sun,Xinhao Wu,Daqin Guan,Xiaoyi Chen,Jie Dai,Yuxing Gu,Sixuan She,Wei Zhou,Zongping Shao
Electrochemical CO2 reduction (ECR) technology is promising to produce value-added chemicals and alleviate the climate deterioration. Interface engineering is demonstrated to improve the ECR performance for metal and oxide composite catalysts. However, the approach to form a substantial interface is still limited. In this work, we report a facile one-pot coprecipitation method to synthetize novel silver and silver-doped ceria (Ag/CeO2) nanocomposites. This catalyst provides a rich 3D interface and high Ce3+ concentration (33.6%), both of which are beneficial for ECR to CO. As a result, Ag/CeO2 exhibits a 99% faradaic efficiency and 10.5 A g–1 mass activity to convert CO2 into CO at an overpotential of 0.83 V. The strong interfacial interaction between Ag and CeO2 may enable the presence of surface Ce3+ and guarantee the improved durability during the electrolysis. We also develop numerical simulation to understand the local pH effect on the ECR performance and propose that the superior ECR performance of Ag/CeO2 is mainly due to the accelerated CO formation rate rather than the suppressed hydrogen evolution reaction.
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PubMed
高影响因子
INORGANIC CHEMISTRY
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2024
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IF 4.3
Ying Wang,Chao Wang,Luxuan Men,Qingsong Hu,Jiawen Xiao
Rare earth-based halide double perovskites are regarded as an emerging class of X-ray scintillation materials. However, the majority of related scintillator applications are still focused on single crystal and powder systems; the application of nanocrystal (NC) scintillators is rarely reported. Here, we present the synthesis of high-purity Cs2NaTbCl6 NCs by an improved hot-injection method. Interestingly, hollow Cs2NaTbCl6 NCs are observed, the monitoring of the growth process indicates that micrometer-sized NaCl is the initial product, and then the NaCl would convert into Cs2NaTbCl6 NCs through the diffusion of Cs+ and Tb3+ into NaCl lattice, and the faster outward diffusion of Na+ results in the formation of hollow NCs. The double perovskite NCs exhibit green light emission, and the photoluminescence intensity can be significantly enhanced through Ce3+ doping. In particular, the Cs2NaTbCl6:5%Ce3+ scintillator exhibits a linear response and a low detection limit of 79.09 nGy/s when exposed to X-rays. Furthermore, a flexible scintillator film for X-ray imaging is prepared by mixing NCs with polymer, showing a high spatial resolution imaging capability of 10 lp/mm. This work provides a new strategy for hollow perovskite NCs and may shed light on the synthesis of related hollow NCs and their applications in X-ray detection.
研究领域:
材料科学
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纳米技术
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放射学
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闪烁材料
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高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 8
·期 13
·4408-4420
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IF 7.059
Shaoying Wang,Balaji Devakumar,Qi Sun,Jia Liang,Liangling Sun,Xiaoyong Huang
Inorganic phosphors with broadband near-ultraviolet (near-UV) excitation and efficient visible emission are highly important for fabricating high-performance near-UV-pumped white light-emitting diodes (LEDs). Herein, we report on novel efficient near-UV-excitable Ce3+/Tb3+ ion co-activated Ca2YHf2Al3O12 (CYHA) green-emitting garnet phosphors, which were successfully prepared through a high-temperature solid-state reaction process. X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental mapping, photoluminescence, CIE color coordinates, the internal and external quantum efficiency, and temperature-dependent emission spectra were used to characterize the samples. Interestingly, due to the efficient energy transfer from Ce3+ to Tb3+ ions in CYHA, the CYHA:Ce3+,Tb3+ samples presented a wide excitation band in the 370–470 nm region peaking around 408 nm owing to the 4f–5d transition of Ce3+ ions, and under 408 nm excitation they showed intense characteristic sharp green emission around 543 nm corresponding to the 5D4 → 7F0–6 transitions of Tb3+ ions. The energy transfer mechanism from Ce3+ to Tb3+ ions was ascribed to the quadruple–quadruple interaction, and the energy transfer efficiency reached as high as 93.2%. Notably, the composition-optimized CYHA:0.03Ce3+,0.6Tb3+ sample exhibited a high internal quantum efficiency (IQE) of 78.5% and external quantum efficiency (EQE) of 56%, which were much higher than those of the Tb3+ singly-activated CYHA:0.6Tb3+ sample (IQE = 8%, EQE = 2.2%). Finally, a prototype white LED device was made by combining a 400 nm near-UV-emitting LED chip with a phosphor blend of the as-prepared CYHA:0.03Ce3+,0.6Tb3+ green phosphors, commercial BaMgAl10O17:Eu2+ blue phosphors and commercial CaAlSiN3:Eu2+ red phosphors, which emitted bright warm-white light with good CIE chromaticity coordinates of (0.391, 0.356), a low correlated color temperature of 3528 K and a high color rendering index of 92.3 under 120 mA driving current. This work opens up new opportunities for the development of efficient color converters toward near-UV-pumped warm-white LEDs with high color rendering index.
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高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Yingying Jin,Kaihao Fan,Miao Feng,Yaoguang Wang,Hongfeng Chen,Xuesong Liu
This study investigates synergistic effects in Ni/CeO 2 catalysts for ammonia decomposition, comparing impregnation and mechanical mixing preparation methods. The impregnated catalyst achieved >90 % NH 3 conversion above 500 °C, outperforming Ni/SiO 2 and mixed counterparts. Strong interactions at the Ni-CeO 2 interface facilitated the formation of Ni-O-Ce bonds, lattice distortion, and oxygen vacancies (O v )/Ce 3+ species, enhancing Ni dispersion (34.7 nm vs. 73.1 nm) and electron transfer. Optimal NH 3 pretreatment (550 °C, 1.5 h) generated metallic Ni 0 as the primary active species, with higher Ni 0 content (XPS) and reducibility (H 2 -TPR). The novelty lies in establishing how NH 3 pretreatment dynamically assembles contiguous Ce 3+ -O v -Ni 0 triads. These sites facilitate rate-limiting N 2 desorption through localized electron donation from O v and Ce 3+ to Ni 0 , which weakens N-N bonds (NH 3 -TPD). Impregnation-derived synergy: (i) enhances Ni dispersion/reduction, (ii) promotes O v formation, and (iii) enables NH 3 -pretreatment-induced assembly of contiguous Ce 3+ -O v -Ni 0 triads that create electron-rich sites, lowering the activation barrier. This work provides a foundation for designing cost-effective catalysts via atomic-scale control of metal-support interactions.
研究领域:
催化
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材料科学
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化学工程
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表面科学
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环境科学
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Yonghai Gou,Rui Zhang,Jun Pang,Zhenzhen Qiu,Chaochao Dong,Huidong Mo,Xiaoli Wu,Jilin Wang
Garnet transparent ceramics are promising color converters for white laser diodes (LDs) because of their efficient broadband emission and favorable thermal properties. Herein, composite color converters were prepared by integrating the Lu 3 Al 5 O 12 :Ce 3+ (LuAG:Ce) transparent ceramics with h-BN modified Mg 2 Al 4 Si 5 O 18 : Eu 2+ (MAS:Eu) phosphor-in-glass films (PiGFs). Under 450 nm excitation, the LuAG: Ce-BN-MAS:Eu composites exhibit broad emission bands ranging from 480 to 720 nm, and the relative Eu 2+ /Ce 3+ emission intensity ratio rises with increasing h-BN content. The optimized LuAG:Ce-2BN-MAS:3Eu sample shows the highest emission intensity, with an internal quantum efficiency of 92.46% and an external quantum efficiency of 42.83%. In addition, the emission intensity at 150 °C retains 94.56% of that at room temperature. Under blue-laser irradiation at 12.5 W∙mm -2 , the steady-state temperature of light spot remains below 76.7 °C. The constructed laser-driven lighting device exhibits a luminous efficacy of 83.45 lm∙W -1 , a correlated color temperature of 6103 K and a Ra of 85.8. These results indicate that the LuAG:Ce-BN-MAS:Eu composites exhibit great potential for high-color-rendering white LDs.
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高影响因子
CERAMICS INTERNATIONAL
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2022
·
IF 5.532
Tao Long,Zixin Wang,Yuxiao Fan,Hui Lin,Haojie Sun,Cheng Zou,Dawei Zhang,Songlin Zhuang
In this study, two kinds of composite ceramic phosphors, Ce 3+ :YAG/Al 2 O 3 and Ce 3+ :Y(Gd)AG/Al 2 O 3 were prepared via solid state reaction sintering in flowing pure oxygen at atmospheric pressure. The ceramic phosphors were packaged into chip-scale white light emitting diodes (w-LEDs), and laser assisted w-LED automobile headlight prototypes were assembled. The luminous flux output of the w-LEDs was significantly improved through additional blue diode laser excitation. Notably, the Al 2 O 3 phase is able to impart an improvement in the luminescence saturation exhibited by Ce 3+ :Y(Gd)AG, which typically reaches saturation prior to Ce 3+ :YAG.
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高影响因子
ACS Applied Electronic Materials
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2022
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IF 4.494
Yuqi Huang,Tiange Li,Mengmeng Lei,Xianqing Huang,Tianlin Wang
In the present investigation, we demonstrated a simple approach for the reproducible synthesis of cerium(III)-based blue phosphor, which provides versatile applications in the construction of warm white-light-emitting diodes (WLEDs) and anticounterfeiting patterns. It is found that the mixture of dipicolinic acid (DPA) with Ce3+ in ethanol (DPA-Ce) emits blue fluorescence under the assistance of ultraviolet (UV) induction. The quantum yield of the DPA-Ce phosphor reaches 44% and is improved to 52% by combining with guanosine 5′-monophosphate (GMP). The obtained DPA-Ce-GMP emits blue fluorescence in both a solid powder and aqueous solution, having advantages of long luminescence lifetimes, ultralong stability, and outstanding antitemperature bleaching. With DPA as a universal ligand, DPA-Tb with green fluorescence and DPA-Eu with red fluorescence are integrated with the blue fluorescence of DPA-Ce-GMP to construct full-color and white-light-emitting devices. The as-prepared warm WLED with a quantum yield of 64% presents an excellent stability and high quality with a color rending index of up to 90, CIE color coordinates of (0.37, 0.36), a correlated color temperature of 3950 K, and a luminous efficiency of 37.8 lm W–1. Multiple anticounterfeiting patterns are further encoded with the as-prepared lanthanide-based phosphors. The investigation offers a simple assay for the cost-effective, large-scale synthesis of phosphors, with great promise in diverse applications including the lighting industry and anticounterfeiting technology.
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高影响因子
Materials Today Chemistry
·
2021
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IF 8.301
Wei Li,Nan Ma,Balaji Devakumar,Xiaoyong Huang
The current commercial white light-emitting diodes (LEDs) are generally based on the combination of blue LED chips and Y 3 Al 5 O 12 :Ce 3+ yellow phosphors. However, because of the lack of red component, such white LED devices exhibit cool white-light emissions with low color rendering index (Ra < 75, R9 < 0). Therefore, it is urgent to discover new blue-light-excitable yellow-emitting phosphors with enhanced red emissions for fabricating high color-quality white LEDs. In the present work, we demonstrate a novel broadband yellow-emitting CaGd 2 HfScAl 3 O 12 :Ce 3+ garnet phosphor for blue-light-excited white LEDs with improved color rendering index. The as-prepared CaGd 2 HfScAl 3 O 12 :Ce 3+ garnet phosphor possesses a cubic structure with Ia 3 ¯ d space group, and the unit cell parameters of the representative CaGd 2 HfScAl 3 O 12 :2%Ce 3+ phosphor are a = b = c = 12.450 Å, α = β = γ = 90°, and V = 1,929.59(4) Å 3 . Impressively, we find that the CaGd 2 HfScAl 3 O 12 :Ce 3+ garnet phosphor shows an intense absorption band in the 300–500 nm wavelength range with a maximum at 452 nm owing to the 4f→5d transition of Ce 3+ ions. On 452 nm excitation, the optimal CaGd 2 HfScAl 3 O 12 :2%Ce 3+ sample exhibits a broad asymmetric yellow emission band in the wavelength range of 470–750 nm with peak at 564 nm and full width at half maximum of 151 nm. The Commission Internationale de l’Eclairage chromaticity coordinates and internal quantum efficiency of the CaGd 2 HfScAl 3 O 12 :2%Ce 3+ sample are (0.4485, 0.5157) and 30.4%, respectively. Finally, a white LED device is fabricated by combing a 450 nm blue LED chip with commercial Y 3 Al 5 O 12 :Ce 3+ yellow-emitting phosphor, which generates white light with low color rendering index (CRI; Ra = 74.7, R9 = −12.7) and high correlated color temperature (CCT = 6,554 K) under the 60 mA driving current. In sharp contrast, another white LED device, which is made by coating our as-prepared CaGd 2 HfScAl 3 O 12 :2%Ce 3+ yellow-emitting phosphors onto the surface of a 450 nm blue LED chip, produces white-light emission with high CRI value (Ra = 84.5, R9 = 26.3) and relatively low CCT of 5,649 K. This work reveals that the newly discovered broadband yellow-emitting CaGd 2 HfScAl 3 O 12 :Ce 3+ phosphors can serve as a potential color converter in high-color-quality phosphor-converted white LEDs.
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高影响因子
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