JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Yingnan Dong,Yumeng Jia,Kenan Xu,Xu Sun,Jing Wang,Zhongxiang Shi,Yanchen Liu
In order to expand the multi-scene application of rare earth doped luminescent materials in the field of blue light illumination, a series of Ce 3+ doped Na-β″-Al 2 O 3 phosphors were prepared by solid-state method with Na-β″-Al 2 O 3 as matrix. The crystal structure, micro-morphology, optical properties and thermal stability were investigated systematically. The results show that the activated ion Ce 3+ in the prepared Na-β″-Al 2 O 3 : x Ce 3+ phosphor replaces the Al 3+ (CN = 6) lattice in the crystal, and with a outstanding blue light emission. In addition, the thermal stability of Na-β″-Al 2 O 3 : 0.05Ce 3+ phosphor is analyzed by variable temperature spectrum, and its luminescence intensity at 573K can reach 71.55 % at room temperature. Finally, Na-β″-Al 2 O 3 : 0.05Ce 3+ phosphors are packaged with 330 nm n-UV LED chips to obtain high quality blue LED devices. With its high color rendering index (81.60), low color temperature (2886 K) and good color consistency, it provides a theoretical basis for the application of Na-β″-Al 2 O 3 -based phosphors in blue LED devices, and makes it show great application potential in the field of solid-state blue spectral lighting.
研究领域:
材料科学
·
固体化学
·
发光材料
·
照明工程
·
无机功能材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Reziwanguli Yantake,Palidan Aierken,Taximaiti Yusufu,Zhou Shihang,Aierken Sidike
Broadband cyan-emitting phosphors with strong absorption between 300 and 400 nm are ideal replacements for traditional blue and green phosphors used in commercial light-emitting diodes (LEDs). In this paper, a series of K 1-x AlSiO 4 : xCe 3+ (x = 0.02–0.06) broadband cyan phosphors were prepared using the traditional high-temperature solid state method and the cation un-equivalent substitution strategy. It was found that the KAlSiO 4 matrix has a monoclinic structure with high symmetry. The experimental and theoretical optical band gaps of the host were 5.6 eV and 4.86 eV, respectively. After doping with Ce 3+ , strong absorption was observed in the near ultraviolet region. The optimum Ce 3+ doping concentration in the host was 0.04 as indicated by the strongest observed emission intensity. The full width at half maximum of the emission spectra of the series of samples are all greater than 120 nm and covered the blue and green wavelength ranges (370–600 nm). The luminous intensity of the K 0 · 96 AlSiO 4 : 0.04Ce 3+ phosphor at 150 °C was 91.1% of that at room temperature, and the Gaussian peak of the emission spectrum slightly broadened. These results were also combination with theoretical DFT calculations. It was found that the phosphor had very good thermal stability and rigidity. The phosphor was also mixed with a commercial red phosphor, interfaced with a UV chip and packaged into an LED. This LED was characterized and had a color rendering index greater than 90 across a broad range of drive currents. This work highlights the utility of the fabricated phosphor as means of simplifying white-light LED fabrication.
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
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Xiao Wei,Xuan Fang,Shuming Ma,Huaqiang He,Zhixin Wu,Silin Li,Shihao Zhang,Pei Nian,Wenlan Ji,Yibin Wei
Addressing the contamination of antibiotics has attracted ever-increasing and imperative attention due to their widespread existence, easy-to-cause drug-resistant bacteria infection, coupled with their intrinsic toxicity and hazard to environments and human health. Herein, a novel CC/CoNi-LDH-10%Ce anode material was directly constructed through a simple and rapid electrodeposition strategy, serving as an efficacious electrocatalyst for removing ciprofloxacin (CIP) from aqueous solution. Such novel CC/CoNi-LDH-10%Ce anode delivered a higher charge transfer, relatively abundant oxygen vacancies, and a higher electrochemical active area. The as-fabricated CC/CoNi-LDH-10%Ce electrode achieved a substantially boosted CIP removal efficiency of 52.5% relative to that of pure CC at about 23.9%. Notably, doping an appropriate amount of Ce 3+ can endow the pristine CC/CoNi-LDH with richer oxygen vacancies and excellent electrocatalytic performance. Additionally, the electrocatalytic oxidation of CIP was attributed to both direct oxidation on the electrode surface and indirect oxidation induced by the generated active species (superoxide radicals and hydroxyl radicals). This study provides a simple, universal and flexible tactic for other researchers in designing and manufacturing avenues of electrodes.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Weixin Zhou,Chaogang Lou
In recent years, significant efforts have been made to explore the application of Ce 3+ 5d-4f radiation transitions in photovoltaic cells. However, conventional fabrication methods are constrained by prolonged preparation times and high processing temperatures. This study synthesizes traditional rare earth YAG: Ce 3+ phosphors using the spark plasma sintering (SPS) method through multi-field coupling and systematically compares their luminescent performance with phosphors prepared by high-temperature solid-state reactions (HTSSR). The crystal structure, morphology, luminescent properties, and fluorescence lifetime of the synthesized phosphors were thoroughly investigated. The results show that YAG: Ce 3+ phosphors synthesized by SPS possess a cubic garnet structure with an Ia-3d space group, confirming the effective incorporation of Ce 3+ into the YAG host. The average particle diameter of YAG:0.01Ce 3+ @SPS-1400 °C phosphors (1.1289 μm) is smaller than that of HTSSR-prepared samples (1.9326 μm). Under 466 nm blue-light irradiation, YAG:0.01Ce 3+ @SPS-1400 °C phosphors exhibit broad-band yellow emission centered at 534 nm, with a full width at half maximum (FWHM) of 102 nm. Compared to other samples, the YAG:0.01Ce 3+ @SPS-1400 °C phosphors demonstrate a slight red shift and a longer fluorescence decay lifetime (43.6 ns). These enhanced luminescent and fluorescence properties contribute to a 0.90 % improvement in the relative efficiency of silicon heterojunction (SHJ) solar cells incorporating YAG:0.01Ce 3+ @SPS-1400 °C phosphors, compared to a 4 % decrease with YAG:0.01Ce 3+ @HTSSR. The findings highlight the potential of SPS-fabricated YAG:Ce 3+ phosphors to enhance SHJ solar cell efficiency, presenting a novel and efficient preparation method for rare earth phosphors.
研究领域:
材料科学
·
能源科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·Vol. 43
·期 10
·2100-2107
·
IF 5.2
Jing Yan,Junyu Hong,Xiaohui Li,Bojana Milićević,Lei Zhou,Chunyan Jiang,Mingmei Wu
Nowadays, high-quality phosphor-converted white light-emitting diodes (pc-WLEDs) ought to include cyan-emitting phosphors allowing for full-spectrum light similar to sunlight. Herein, we report a garnet-structured Ce 3+ -doped SrLu 2 Ga 1.5 Al 2.5 SiO 12 (SLGASO) phosphor that significantly compensates for the absence of cyan light, known as the “cyan cavity”. The SLGASO host crystallizes into a cubic structure with the I a 3 ¯ d space group. The cell parameters were determined using Rietveld refinement. Under 430 nm blue excitation, SLGASO:Ce 3+ emits intense cyan-green light in the 450–700 nm wavelength range. The representative SLGASO:0.07Ce 3+ phosphor has an internal quantum efficiency (IQE) of 95.4% and excellent thermal stability, remaining 92.7% of its initial emission intensity at 152 °C. After 155 d of immersion in water, the luminous intensity of SLGASO:0.07Ce 3+ remains constant, confirming its waterproofness. Furthermore, a pc-WLED device with luminous efficiency (LE) of 101.58 lm/W, color rendering index ( Ra ) of 91, correlated color temperature (CCT) of 4536 K, and Commission Internationale de L'Eclairage (CIE) chromaticity coordinates of (0.3555, 0.3390) was fabricated by combining as-prepared cyan-green-emitting SLGASO:0.07Ce 3+ , yellow-emitting Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ), and red-emitting (Ca,Sr)AlSiN 3 :Eu 2+ phosphors, as well as a 450 nm blue chip. These findings indicate that SLGASO:0.07Ce 3+ phosphor can bridge the cyan gap and improve the performance of as-fabricated full-visible-spectrum WLEDs.
研究领域:
材料科学
·
光学材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Jingming Chan,Balaji Devakumar,Huanzhuo Gao,Xiaoyong Huang
High-color-rendering full-spectrum warm-white light-emitting diodes (LEDs) are in great demand in the field of high-end solid-state white lighting. However, the so-called cyan gap (480–520 nm) in conventional white LEDs always limits their color rendering index (CRI) values, and thus there is a pressing need for cyan phosphors to fabricate full-spectrum white LEDs. Herein, we report on an efficient violet-excited blue-cyan-emitting Ca 2 YHf 2 GaAl 2 O 12 :Ce 3+ (CYHGA:Ce 3+ ) garnet phosphor, which is capable of realizing full-spectrum warm-white LEDs with superior CRI (Ra = 98.2, R12 = 96, R9 = 95) and low correlated color temperature (CCT) of 3735 K. Importantly, when excited at 398 nm, the optimal CYHGA:2%Ce 3+ sample exhibits a strong broadband blue-cyan emission (emission peak: 473 nm; emission bandwidth: 92 nm) with high luminescence efficiency (internal quantum efficiency: 69.9 %; external quantum efficiency: 43.3 %), which perfectly covers both blue and cyan spectral region and enables to close the so-called cyan gap. The fabricated warm-white LED device based on CYHGA:2%Ce 3+ blue-cyan phosphor generates bright warm-white lights with ultra-high CRI values (Ra ≥96.5; R12 ≥ 94; R9 ≥ 93) and low CCT values (3674–3845 K) upon 20–320 mA driving currents. Thus, blue-cyan-emitting CYHGA:Ce 3+ garnet phosphors possess a bright application prospect in high-quality full-spectrum LED lighting.
研究领域:
材料科学
·
光学工程
·
固态照明
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Bingxin Xie,Lei Lei,Enyang Liu,Gongxun Bai,Renguang Ye,Shiqing Xu
Novel blue LED excitable Ce 3+ -doped alkaline-earth sulfide nanocrystals are exploited for selective and sensitive Fe 3+ ions sensing in this work. The detection limit is calculated to be as low as 92.5 nM, which is better than most previous ultra-violet light excited fluorescence probes. The decreased radiative probability of the Ce 3+ : 5d by the NC surface environmental variation activates the sensing capability.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 18
·1251
·
IF 2.8
Zheng Jinjie,Shen Honglie,Li Yufang,Li Hechao,Yue Zhen
Novel efficient visible and near-infrared emitting phosphors NaY(MoO 4 ) 2 (NYM):Ln 3+ (Ln = Ce and Yb) were proposed in this work. The crystal structure, lattice vibration characteristics, morphology, and luminescent properties of NaY(MoO 4 ) 2 phosphors were described. Sensitization of Ln 3+ from the host with various doping concentrations was investigated. The yellow-green emission was achieved in Ce 3+ single-doped NYM phosphors at UV ultraviolet excitation sensitized by the MoO 4 2− group. Under UV excitation, characteristic emissions of Ce 3+ at 400–700 nm and Yb 3+ at 1000 nm of NYM:Ce,Yb were observed, enabling the spectral down-conversion applications. With the increasing concentration of Yb 3+ , the emission intensity as well as the lifetime of Ce 3+ decreased, confirming the energy transfer from Ce 3+ ions to Yb 3+ ions. And the energy transfer coefficient was 27% for NYM:0.01Ce,0.10Yb phosphor. These results indicate that the as-prepared phosphors have potential applications in optical and photonic devices.
研究领域:
材料科学
·
光学材料
·
发光学
·
无机化学
·
光子学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 13
·21560-21568
·
IF 3.83
Mingcai Li,Xuejie Zhang,Yinjian Zheng,Yaliang Xu,Haoran Zhang,Yingliang Liu,Bingfu Lei
The discovery of light converter excited by near-ultraviolet (UV) superior broadband blue-emitting lighting source is a main challenge in plant growth LEDs. In this study, SrLu 2 O 4 :Ce 3+ , Li + , F − blue phosphor has been synthesized via a solid-state reaction. Benefitting from doping of F − ions, SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor (λ ex = 405 nm, λ em = 460 nm) shows a strong broadband (FWHM = 90 nm) blue-emitting with lower critical concentration of Ce 3+ ions and an increasing 6.9% thermal quenching performance (92.1% @ 423 K of the peak intensity at room temperature). Moreover, a blue light converter composed of SrLu 2 O 4 :Ce 3+ , Li + , F − phosphor and glass matrix is obtained based on phosphor-in-glass (PiG) technology, exhibiting excellent thermal stability and outstanding moisture resistance . A red light converter with commercial red phosphor is obtained by the same method. Furthermore, by combining of two light converters with near-UV chip, a proof-of-concept plant growth high power LED is achieved and applied in indoor Italian lettuce growing in comparison with commercial plant lamps.
研究领域:
材料科学
·
光学工程
·
农业光电子学
·
固体发光
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 48
·17504-17510
·
IF 7.393
Bochao Sun,Yuqing Xie,Yunlong Zhao,Xiang Li,Junfeng Chen,Yushou Song,Lei Zhao,Zhigang Li,Hongtao Zhao,Jing Ren,Jianzhong Zhang
Transparent Ce3+-doped nano-glass composites (nano-GCs) embedded with pure and Gd3+-mixed KLaF4 nanocrystals (NCs) are prepared by a cost-effective and reproducible glass-making and thermal treatment method. The nano-GCs can be readily cast into various sizes and shapes. The growth of the Gd3+-mixed NCs and the enrichment of Ce3+ in the NCs are unambiguously revealed. Significantly enhanced emissions of Ce3+ with a photoluminescence quantum yield as high as 92.7% are observed in the nano-GCs embedded with the Gd3+-mixed NCs. The integral X-ray excited emission intensity of the nano-GC is 170% that of the Bi4Ge3O12 (BGO) single crystal. A light output of about 853 ± 8 ph per MeV with an energy resolution of 22.27% is obtained using the nano-GC for γ-ray (662 keV) detection. The Monte Carlo simulation is carried out to understand the differences in X- and γ-ray responses. As a proof-of-concept, a real-time remote X-ray fiber dosimeter is constructed using a scintillating fiber made out of the nano-GC, which shows an excellent linear response with the irradiation dose, good thermal stability and radiation hardness.
研究领域:
材料科学
·
光学
·
核技术应用
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 4
·1530-1540
·
IF 8.067
Shisheng Lin,Hang Lin,Pengfei Wang,Ping Sui,Hongyi Yang,Ju Xu,Yao Cheng,Yuansheng Wang
Phosphor-converted white laser diode (pc-wLD) technology requires high-color-quality white light, which involves the development of an efficient red-emitting phosphor color converter. With regard to this, we have developed a new kind of orange-yellow-emitting Lu2−xMg2Al2−yGaySi2O12:xCe3+ (LMAGS:Ce3+) solid-solution phosphor, which shows the desired abundant red-emissive components and nanosecond-range luminescent decay. LMAGS:Ce3+ is further compounded into an all-inorganic phosphor-in-glass (PiG) composite tightly bonded to a high-thermal-conductivity sapphire plate (SP) in the form of a film. There is no obvious interfacial reaction between phosphor and glass during co-sintering, which ensures good luminescent properties are retained. A comparative study was conducted to reveal the microstructure–property relationship and the key influencing factors of luminescence saturation upon being driven by a blue laser. “One-dimensional photonic crystal film” and “phosphor wheel” designs were adopted to further enhance the luminescent performance, successfully improving the luminous flux of the generated white light to 393.8 lm @ 5 W mm−2 under static–transmissive excitation mode and 1080 lm @ 20 W mm−2 under rotatory–reflective excitation mode. Probing into the luminescence saturation mechanism, the effects of thermal saturation and optical saturation were demonstrated, accounting for 44.0% and 56.0% contributions, respectively. A fabricated prototype neutral/warm-white LD lighting source based on LMAGS:Ce3+ PiG film-on-SP shows high light collimation and comfortable visual perception, demonstrating the bright application potentials of the developed composite material.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yang,Kun Ge,Huiyun Ban,Huiping Yuan,Sen Qian,Zhehao Hua,Hua Cai,Danping Chen,Jifeng Han,Xvsheng Qiao,Jing Ren,Xinyuan Sun,Gao Tang,Shenghua Yin,Minghui Zhang,Jiawen Xiao
A series of Ce 3+ -doped Gd 2 O 3 -GdF 3 -Al 2 O 3 -B 2 O 3 -SiO 2 glass scintillators (GSC x and GLC x ) were successfully synthesized in reducing atmosphere for future imaging application. The transmittance of GSC x glasses exceeds 85 % in range of 500–800 nm, and the cut-off edge red shifts as the Ce 3+ concentration increases. In photoluminescence (PL), GSC x glass scintillators have a 360–600 nm broadband emission with a shoulder peak at around 450 nm. Meanwhile, the PL lifetime of GSC x glasses is close to the CeF 3 crystals, and the PL QY of GSC 3 glass scintillator reaches up 70.2 %. For scintillation application, the integral XEL intensity of GSC 2 and GSC 3 glasses is 31.3 % and 24.4 % of that of BGO crystal. GLC 2 and GLC 3 glasses exhibit similar spatial resolution of approximately 7 lp·mm −1 . Moreover, the light yields of GSC 2 and GSC 3 glass scintillator are 1702 and 1690 ph/MeV excited by γ-ray, respectively. The nonproportionality of GSC x glasses is less than 3 % in the range of 100–1400 keV due to the large density and Z eff . As Ce 3+ concentration increases, both the fast and slow components of the glasses decrease (103.7 ns–89.7 ns, 1454.4 ns–1012.8 ns), and the proportion of fast component also increased from 3.3 % to 4.7 %. For γ-ray imaging, the scintillation light events of the glass can be observed from SiPM array, and the central position (−2, −1) have the highest count rate of the system. The results show that GSCx and GLCx glass scintillators deserve further development for future applications.
研究领域:
材料科学
·
核医学
·
生物医学工程
·
辐射探测
·
光学材料
✓ 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）