Laser & Photonics Reviews
·
2026
·
IF 10
Ming Zhao,Yi Zhang,Qinfang Hu,Xinquan Zhou,Lixin Ning,Xinping Zhang
Eu 2+ -activated inorganic phosphors are widely used in optoelectronic fields due to their superior luminescence properties. However, stabilizing Eu 2+ dopants at trivalent Ln 3+ sites in Ln(III)-based phosphors (Ln = Y 3+ , La 3+ , and Lu 3+ ) remains challenging because of charge imbalance and lattice instability, which has limited related luminescence mechanistic insights and materials discovery. Here, we propose a universal strategy that introduces interstitial alkali-metal defects to break through the thermodynamic and kinetic constraints of Eu 3+ →Eu 2+ reduction in Ln(III)-based hosts. High-throughput experiments validate the effectiveness of this approach across multiple host systems. As a proof of concept in classical Lu 2 SiO 5 , the introduced interstitial Na drives the emission from a sharp red Eu 3+ line to a broad green Eu 2+ band at ∼500 nm with persistent luminescence exceeding 10 h. The interstitial Na defects act dually by promoting Eu 3+ →Eu 2+ reduction and serving as an afterglow energy reservoir. The remarkable afterglow property enables multifunctional applications in advanced information encryption and fingerprint recognition. This work demonstrates a promising approach to exploring Eu 2+ luminescence properties in established materials via defect-assisted reductive engineering, opening avenues for developing new optofunctional materials.
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高影响因子
JOURNAL OF RARE EARTHS
·
2016
·Vol. 34
·期 5
·453-457
·
IF 2.188
Zhiliang DONG,Yi QIN,Yong YANG,Dacheng ZHOU,Xuhui XU,Jianbei QIU
A series of Ba 5 Si 8 O 21 :0.02Eu 2+ ,0.09RE 3+ persistent phosphors were synthesized by the solid-state reaction method. The measurement results of photoluminescence (PL), phosphorescence and thermoluminescence (TL) were analysed and discussed. The XRD results showed that samples codoped with different RE 3+ were Ba 5 Si 8 O 21 single pure phase. Under the excitation, all samples exhibited a broad Eu 2+ characteristic emission, and the La 3+ co-doped sample emitted the brightest photoluminescence even though its persistent luminescence property was the worst because of the weakest electronegativity. However, Nd 3+ electronegativity was suitable, thus after activation, the Ba 5 Si 8 O 21 :Eu 2+ ,Nd 3+ sample had the best persistent luminescence performance with the highest phosphorescence intensity and the persistent luminescence decay time beyond 8 h. The Nd 3+ co-doped sample also had the largest thermoluminescence integral area which proved effectively it had longer persistent luminescence time. The luminescence mechanism was also proposed to study the photoluminescence and persistent luminescence process. These results showed that RE 3+ electronegativities were distinctly important for persistent phosphors and choosing suitable electronegativity codopant was conducive to enhancing the phosphorescent performance.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 26
·期 12
·10201-10206
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IF 1.569
Li Guanghao,Chen Jingjing,Mao Zhiyong,Song Weiwei,Sun Tao,Wang Dajian
In this work, red-emitting nitride phosphor, CaAlSiN 3 :Eu 2+ , was synthesized successfully by carbothermal method using CaH 2 , AlN, Si 3 N 4 , Eu 2 O 3 and graphite powder under the condition of atmospheric pressure with a moderate temperature of 1550 °C for 6 h. In particular, graphite powder was employed as efficient and robust reducing agent in an optimal C/O mol ratio of 0.86. The obtained CaAlSiN 3 :Eu 2+ phosphors were well crystallized and showed an intense red emission band with peaks in the range of 642–675 nm dependent on the Eu 2+ doping concentration. Excellent thermal stability for as-synthesized Ca 1−x AlSiN 3 :xEu 2+ (x = 0.02–0.10) phosphors with absolute quantum efficiency about 20 % were demonstrated. These results presented here indicated the promising prospect for this economic and facile carbothermal synthesis route in preparing CaAlSiN 3 :Eu 2+ phosphors , and the phosphors are highly promising candidates for warm white LEDs.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 8
·511
·
IF 1.784
Zhou Jiangcong,Lai Yiqing,Huang Xiaotian,Chen Hande
The narrow band phosphors with excellent thermal stability have received growing attention from academic and industrial researchers. In this work, a novel Ba 5 SiO 4 Cl 6 : Eu 2+ phosphor was prepared via solid phase reaction. Their crystal structure, phase composition, morphology and optical performance containing photoluminescence (PL) emission, PL excitation and temperature-dependence PL spectra were systematically analyzed. Compared with commercial BaMgAl 10 O 17 : Eu 2+ blue phosphor, the as-obtained Ba 5 SiO 4 Cl 6 : Eu 2+ phosphor displays a narrower band blue emission ( λ em = 440 nm) with a full width at half maximum of 32 nm under the near ultraviolet light excitation and an excellent thermal stability for 83.3% of the initial intensity at 150 °C. The quantum yield of the Ba 4.98 Eu 0.02 SiO 4 Cl 6 phosphors was estimated to be as high as 57.2%. Finally, a LED device coupling UV-chip (400 nm) with Ba 5 SiO 4 Cl 6 : Eu 2+ , (Sr, Ba) 2 SiO 4 : Eu 2+ , (Sr, Ca)AlSiN 3 : Eu 2+ phosphors display attractive optical performance with LE = 45 lm/W, CCT = 3407 K and Ra = 94. Therefore, there are good reasons for believing that the Ba 5 SiO 4 Cl 6 : Eu 2+ phosphor will be a market prospect phosphor for the application of lighting and display.
研究领域:
材料科学
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光学工程
·
无机化学
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固体物理
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光电子学
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 12
·20545-20552
·
IF 3.83
Quansheng Wu,Jianyan Ding,Jiangcong Zhou
To better meet the needs of modern science and technology for new inorganic functional materials , the exploration of new Eu 2+ -doped phosphors is of great significance. In this work, a zirconium-silicate yellow phosphor, K 2 ZrSiO 5 :Eu 2+ , was explored through theoretical calculations and systematic experiments for use in multifunctional applications. The crystal structure, electronic structure, photoluminescence (PL) and cathodoluminescence (CL) properties of K 2 ZrSiO 5 :Eu 2+ were investigated in detail. As a result, owing to the open framework and the lattice with the covalent connection, K 2 ZrSiO 5 :Eu 2+ phosphor exhibits strong yellow light emission under the near-ultraviolet and electron beam excitation. However, the K 2 ZrSiO 5 :Eu 2+ phosphor suffers a poor thermal stability. Furthermore, the K 2 ZrSiO 5 :Eu 2+ phosphor exhibits good anti-saturation and anti-aging characteristics under the electron beam excitation. The results indicate that the development of K 2 ZrSiO 5 :Eu 2+ phosphor can provide a new insight into discovering multifunctional materials.
研究领域:
材料科学
·
发光材料
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固态化学
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光电材料
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荧光粉技术
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2015
·Vol. 98
·期 6
·1823-1828
·
IF 2.61
Jin Wang,Haoran Zhang,Bingfu Lei,Hanwu Dong,Haiming Zhang,Yingliang Liu,Mingtao Zheng,Yong Xiao
While the reddish-orange emitting phosphors M 2 Si 5 N 8 :Eu 2+ (M = Ca, Sr) have been intensively investigated as potential materials for white-light-emitting diodes, in this study, optical energy storage properties of (Ca 1− x Sr x ) 2 Si 5 N 8 : Eu 2+ , Tm 3+ ( x = 0–1) solid solutions were tuned by cation substitution, which was commonly used to tune color point for improving w-LEDs. Partial substitution of either Ca by Sr or Sr by Ca resulted in a redshifted Eu 2+ emission which had a demarcation point at x = 0.5. Furthermore, the (Ca 1− x Sr x ) 2 Si 5 N 8 : Eu 2+ , Tm 3+ materials exhibited similar persistent- and photostimulated luminescence behaviors with a maximum intensity at about x = 0.2. Such optical energy storage characters of the samples were attributed to the more appropriate trap depths (322–333 K) and higher density of energy level traps indicated by the thermoluminescence analysis.
研究领域:
材料科学
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光电子学
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发光材料
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固态化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yi Zhang,Ziying Chen,Zhenxu Lin,Jie Song,Hongliang Li,Youming Lu,Huihong Lin,Jingxiang Zhang,Dejian Hou,Jieji Zhu,Rui Huang
Particle engineering balances the scattering-luminescence trade-off in phosphor LSCs. • Mie theory and Monte Carlo modeling reveal size-dependent photon harvesting and transport. • Ball milling tunes size and annealing mitigates defects and limits emission loss. • A 100 cm 2 tandem LSC reaches a power conversion efficiency of 2.72%. Luminescent solar concentrators (LSCs) enable large-area solar harvesting and spectral conversion, but their performance is often limited by incomplete solar spectrum utilization and optical losses. Tandem architectures can broaden spectral harvesting. In phosphor-based tandem LSCs, however, particle-level scattering governs both light harvesting and waveguiding efficiency, and the trade-off between scattering and luminescence remains unresolved. Here, we report a scattering-assisted tandem LSC enabled by particle-engineered CaAlSiN 3 :Eu 2+ (CASN) phosphors. Theoretical scattering analysis and Monte Carlo ray tracing simulations show that reducing the particle size improves both solar harvesting and photon transport. To address this trade-off, a two-step post-treatment combining ball milling and rapid thermal processing was developed, in which thermal annealing mitigates milling-induced surface defects and largely preserves luminescence efficiency. The optimized single-layer LSC exhibits an increase in short-circuit current density from 1.48 to 1.99 mA/cm 2 and a power conversion efficiency of 1.56%. When integrated beneath a tetra(t-butyl)rubrene-based top layer, the scattering-assisted tandem LSC achieves a power conversion efficiency of 2.72%. These results establish CASN as a robust luminophore for tandem LSCs, show that powder-level characteristics strongly influence device performance, and offer a general particle engineering route toward high-efficiency scattering-assisted LSCs. Download: Download high-res image (177KB) Download: Download full-size image Particle-engineered CaAlSiN 3 :Eu 2+ phosphors enable a scattering-assisted tandem luminescent solar concentrator with enhanced solar harvesting and photon transport. Ball milling combined with rapid thermal processing preserves strong luminescence while optimizing particle scattering, leading to high external optical efficiency and tandem efficiency in a tandem device integrating tetra-tert-butylrubrene and CaAlSiN 3 :Eu 2+ phosphors.
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Electronic Materials Letters
·
2025
·
IF 2.6
Zhang Ligang,Xu Xiaoming,Ma Lihong,Wang Haosen
A series of Er 3+ /Eu 2+ -activated SrS/SrZnSO with different Er 3+ /Eu 2+ concentrations were synthesized at 1300℃ for 3 h through high temperature solid-state reaction, and their persistence luminescence and mechanoluminescence properties were studied. Upon 450 nm laser excitation, SrS/SrZnSO:Er 3+ /Eu 2+ emitted orange-red light, which could be observed with the naked eyes. When the laser was removed, it showed long afterglow orange-red luminescence. The brightness and duration of the long afterglow increase with the increase concentration of Er 3+ /Eu 2+ from x:y = 0.5%:1% to 3%:1%. SrS/SrZnSO:Er 3+ /Eu 2+ was confirmed as an excellent persistent luminescence material since it could continuously emit light for nearly 10 min. Moreover, under pressure stimulation SrS/SrZnSO:Er 3+ /Eu 2+ showed a novel type of mechanoluminescence (ML) with the emitting bright green light which linearly depended on the force. Under the same force of friction, the sample SrS/SrZnSO:Er 3+ /Eu 2+ with Er 3+ /Eu 3 = 1%:0% emitted the strongest ML among prepared samples. Furthermore, the mechanism of mechanoluminescence was studied in details. This study can expand the family of ML materials while promoting the applications of mechanoluminescence materials in damage diagnosis, human-machine interfaces, and pressure sensing. Graphical
研究领域:
材料科学
·
光学
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yang Luo,Maohua Wang,Yu Jiang,Long Chen,Yuebin Xu,Jiuyang He,Aierken Sidike
Cyan-emitting phosphors are essential to compensate for the emission gap of conventional white light-emitting diodes (WLEDs) in the 480–500 nm range, thus considerably increasing the color rendering index (Ra) and gamut coverage to achieve high-quality full-spectrum lighting. In this work, we developed a phase-tunable Eu 2+ -doped KAlSi 3 O 8 multiphase phosphor via a solid-state reaction, in which controlled Eu 2+ doping (0.000–0.040) induced a phase transition and generated dual emission centers, resulting in a remarkable redshift from 406 nm to 480 nm with a broadened full width at half maximum (FWHM) (67 → 177 nm) to cover the blue–cyan–green regions. The combination of a 365 nm near-UV (NUV) LED chip, KAlSi 3 O 8 :0.040Eu 2+ , and commercial red phosphor yields a white LED device with a high color rendering index (Ra) of 96.1 and chromaticity coordinates of (0.3276, 0.3350). These results demonstrate that this blue–cyan phosphor not only simplifies the fabrication process of white LEDs but also effect ively compensates for the cyan spectral gap, making it a promising candidate material for NUV phosphor-converted WLEDs.
研究领域:
材料科学
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光学材料
·
光子学
·
固态化学
·
发光二极管（LED）
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高影响因子
CERAMICS INTERNATIONAL
·
2013
·
IF 1.789
Jian Li,Zhi-yong Mao,Da-jian Wang,Ying-chun Zhu,Lin Gan,Fang-fang Xu
Tunable white light of Eu 2+ doped SiAlON crystal/glass composite phosphor with blue-yellow dual-emissions was demonstrated by variation of excitation wavelength in this work. The excitation properties of blue emission originated from the transition of Eu 2+ ions in the Si–Al–B–O–N glass matrix and that of yellow emission originated from the transition of Eu 2+ ions in the SiAlON lattice were investigated, respectively. By varying the excitation wavelength in the range of 330–380 nm, white emission was tuned from cool white to warm white for this SiAlON crystal/glass composite phosphor owing to the various excitation properties of these two emission bands. Presented results indicate that this tunable SiAlON crystal/glass composite white-light phosphor might be applied in white LED, combining with UV chips with different emitting wavelengths in the range of 330–380 nm.
研究领域:
材料科学
·
光学工程
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ou Hai,Mengkang Pei,Enlong Yang,Qiang Ren,Xiulan Wu,Yujing Zhao,Liang Du
The single color of long afterglow luminescence materials is one of the important factors restricting its development. Here, we uniformly disperse all-inorganic cesium lead halide (CsPbBr 3 ) perovskite quantum dots (PeQDs) with strong stability on the surface of Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ (SMS) to adjust the afterglow luminescence color. CsPbBr 3 PeQDs has high quantum yield, and its excitation spectrum (around 400–500 nm) overlaps with the emission spectrum (around 465 nm) of SMS, so that the tunable afterglow emission from blue (around 465 nm) to green (around 525 nm) can be achieved by controlling the dosage of CsPbBr 3 PeQDs, and its chromaticity coordinates can be from (0.1280, 0.1360) to (0.2010, 0, 7460). The quantum yield of the composite remains almost unchanged, and the luminescence intensity remains stable and does not decrease when the composite is irradiated by ultraviolet light for 2 h; When exposed to air, the luminescence property remained about 80 percent after 10 days. This study provides a research direction for the polychromatic adjustment of long afterglow luminescent materials.
研究领域:
材料科学
·
光学
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高影响因子
Polymers
·
2023
·Vol. 15
·期 9
·2077
·
IF 5
Longfei Zhang,Ying Wang,Limin Peng,Zhilin Chen,Shaoyi Lyu,Siqun Wang
Long-term relief of indoor volatile pollution has become a competitive issue worldwide in both visible and dark environments. A novel self-luminous wood coating with carbon dots (CDs)/titanium dioxide (TiO2) nanomaterial coated SrAl2O4: Eu2+, Dy3+(CDs/TiO2@SAO) composite was prepared for the long-term degradation of formaldehyde through a simple sol-gel method. The microstructure, chemical composition, ultraviolet-visible (UV-vis) spectra, and long-lasting fluorescence of the CDs/TiO2@SAO photocatalyst were analyzed to illustrate the mechanism for degrading formaldehyde. The obtained CDs with a particle size of ~2–7 nm have a good graphite structure and presented good absorption in visible light. In addition, owing to the synergistic effect of the CDs/TiO2nanomaterial coating layer and the long-afterglow luminescence of the SAO phosphor, the CDs/TiO2@SAO composite can absorb a part of the visible light for photocatalytic degradation and store luminous energy efficiently at daytime so as to give out visible luminescence continuously for a few hours in the darkness. Furthermore, the functional wood coatings with CDs/TiO2@SAO composite presented continuous and efficient photocatalytic activity in the presence and absence of light exposure. The current research could provide a new strategy for designing an efficient photocatalyst for degrading formaldehyde pollution in the daytime with a visible light supply and in an indoor dark environment without an external light source.Keywords:carbon dots;core-shell microspheres;SrAl2O4: Eu2+, Dy3+phosphor;titanium dioxide;surface modification;photocatalytic degradation
研究领域:
材料科学
·
环境科学
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PubMed
高影响因子
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