JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2022
·Vol. 106
·期 3
·1778-1788
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IF 4.186
Xiao Ma,Zhifeng Huang,Hailong Yuan,Yujuan Zhou,Meijuan Li,Fei Chen,Qiang Shen
Rare-earth-doped transparent glass shows great potential in white light-emitting diodes (wLEDs) application due to its excellent optical and luminous properties. Currently reported commercial wLEDs have a drawback in red emission missing, which leads to a relatively low color rendering index (CRI) and a relatively high correlated color temperature (CCT). In this work, Ce@Eu Sr–Si–O glass is fabricated using a high-temperature quenching method. The white light is available when the ratio of Ce 3+ /Eu 3+ equals 1, and the emitting color can be adjusted from blue to red by controlling the ratio of Ce 3+ /Eu 3+ . To further optimize the white light, Eu 3+ ions can be reduced to Eu 2+ according to the reaction of 6Eu 3+ + 2N 3− → 6Eu 2+ + N 2 ↑ by introducing Si 3 N 4 . As a result, the standard white light emission can be achieved in the Ce@Eu silicate glass contributed by the blue light from Ce 3+ , red light from Eu 3+ , and yellow–green light from Eu 2+ (two elements, three emission). This glass shows excellent luminous properties, such as a color coordinate is (0.3651, 0.3269) in CIE 1931 color coordinate diagram, a CRI is over 70, a high quantum yield of 36.02%, and a CCT of 4117 K.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ou Hai,Peng Li,Xin An,Weikang Dong,Tong Li,Zechuan Qi,Yuanting Wu
In order to broaden the application field of long afterglow materials, it is a challenge to realize high stability and multicolor properties of long afterglow materials. The photoconversion method is a condition that enables simultaneous afterglow color shifts, however, the stable and efficient photoconversion agent is an urgent problem. This study propose a strategy to synthesize CsPbBr 3 quantum dots (QDs) directly within porous SiO 2 on the surface of Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ (SMS). The resulting composites achieve a shift in emission and afterglow color from blue (about 468 nm) to green (about 520 nm), and in the UV irradiation for 8 days, the luminous intensity is almost unaffected, in the air exposure for 3 months, the luminous intensity can still be maintained at more than 80 % of the initial value. Since the synthesized composite material is a powder, it can be mixed with various media. Composite materials can be homogeneously mixed with coatings, resulting in coatings with a variety of luminescent colors and producing effective multicolor luminescence, which has significant potential in the field of luminescent coatings and anti-counterfeiting.
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高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jun Xu,Jiabei Sun,Xiaoming Liu,Sisi Zhan,Yanqing Li,Along Gao,Jun Lin
In this work, a series of Eu2+-activated phosphors, including Sr3Sc4-xO9:xEu2+, Ba3(1–y)Sr3ySc3.985O9:0.015Eu2+ (0 ≤ y ≤ 1), and Ba3Sc4-xO9:xEu2+, were successfully synthesized via a sol–gel method. The Sr3Sc4-xO9:xEu2+ phosphors exhibited a broad red emission band centered at 609 nm under 430 nm blue-light excitation, with a measured internal quantum yield of 47.94%. Upon partial substitution of Sr2+ by Ba2+ in Sr3Sc3.985O9:0.015Eu2+, a pronounced redshift in the emission maximum was observed, extending from 609 to 843 nm and thereby covering the entire visible to near-infrared (NIR) spectral range, corresponding to a total shift of 234 nm. Structural analysis indicates that the emission behavior of Eu2+ is strongly influenced by its coordination environment within [Sr/Ba1O6] and [ScO6] octahedra, which exhibit low-symmetry fields and induce substantial crystal field splitting (CFS). Thermal quenching behavior was evaluated by monitoring emission intensity at 150 °C, where Sr3Sc3.985O9:0.015Eu2+, Sr1.5Ba1.5Sc3.985O9:0.015Eu2+, and Ba3Sc3.985O9:0.015Eu2+ retained 85.8%, 75.1%, and 65.8% of their room-temperature luminescence, respectively. These findings demonstrate excellent thermal stability and tunable red-to-NIR emission, establishing this phosphor family as a promising candidate for next-generation NIR-emitting materials and photonic applications.
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PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Lei Yang,Nian Wang,Yu Li,Yanzhi Zhang,Hao Guo,Ruirui Cui,Jun Zhang,Chaoyong Deng
A novel class of Eu 2+ -activated BaSr 2 (PO 4 ) 2 phosphors with efficient deep-blue luminescence was successfully synthesized via a high-temperature solid-state reaction. The rigid phosphate framework provides a distinctive coordination environment for Eu 2+ , leading to enhanced luminescent thermal stability. Structural and morphological characterization confirmed the phase-pure formation, with Eu 2+ ions effectively incorporated into the host lattice. The optimal sample (BaSr 2 (PO 4 ) 2 : 0.03Eu 2+ ) exhibits an intense deep-blue emission centered at 416 nm under 348 nm near-ultraviolet irradiation and concentration quenching occurs beyond the optimal doping level due to dipole-dipole interactions. The phosphor demonstrates outstanding thermal stability, retaining 92.23 % of its room-temperature intensity at 423 K, and possesses an internal quantum efficiency (IQE) of 41.19 %. Fabricated white light-emitting diodes, employing this phosphor, produce warm white light with high color rendering (CRI = 93.1) and a correlated color temperature of 4652 K. Additionally, the phosphor was effectively utilized in anti-counterfeiting inks. This study demonstrates that BaSr 2 (PO 4 ) 2 : Eu 2+ phosphors not only possess excellent thermal stability but also show great potential for both anti-counterfeiting security inks and white light-emitting diodes applications, providing a valuable strategy for developing efficient deep-blue phosphors.
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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固态化学
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发光二极管（LED）
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安全技术
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 32
·19173-19186
·
IF 10.733
Xiaoming Liu,Xueya Chen,Yizu Li,Bingquan Wu,Xubiao Luo,Sheng Ouyang,Shenglian Luo,Abdulaziz A. Al Kheraif,Jun Lin
Here, we demonstrate a g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite as a novel efficient self-luminous visible-light plasmonic photocatalyst for photocatalytic degradation of organic pollutants and hydrogen evolution from water around the clock. The g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite was prepared by integrating a g-C3N4@Au plasmonic photocatalyst composite with a SrAl2O4:Eu2+,Dy3+ long-afterglow phosphor through a simple Pechini-type sol–gel method followed by a mechanical mixing and high-temperature calcination process. Owing to the synergistic effect of surface plasmon resonance of the Au nanoparticles in g-C3N4 and long-lasting phosphorescence of the SrAl2O4:Eu2+,Dy3+ phosphor, the prepared g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite shows a continuous and efficient photocatalytic activity for photocatalytic degradation of organic pollutants and hydrogen evolution from water in a sunless environment. The current research study could provide a new strategy for designing a highly efficient composite photocatalyst for solar environmental purification and hydrogen energy production around the clock.
研究领域:
光催化
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环境科学
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材料科学
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可再生能源
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纳米技术
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
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Optical Materials Express
·
2022
·Vol. 12
·期 10
·4117-4132
·
IF 3.074
Zihan Zhao,Zihan Zhao,Ran Zhang,Ran Zhang,Hao Song,Yanjie Zhang,Yanjie Zhang,Yanjie Zhang,Xiuping Wu,Desheng Li,Bing Li,Bing Li
As blue emitting component in phosphor-converted white-light-emitting-diodes (pc-wLEDs) encapsulated with near-ultraviolet (NUV) chips, Eu2+ activated fluorapatite structure phosphors play key roles because of strong structural stability and excellent photoluminescent properties. A series of M5(PO4)3F: Eu2+ (M = Ca, Sr) samples have been newly prepared by deposition-precipitation process (DP) and exhibited a 6.7-fold enhancement of photoluminescent (PL) intensity due to the highly dispersed Eu2+ luminescence centers when compared with the reference samples synthesized via traditional solid-state reaction method (SSR). Detailed analysis of crystal field around Eu2+ and the nonlinear fitting of PL spectra concludes that Eu2+ activators with the 4f6 → 4f75d transition preferentially replace Ca1 in 4f symmetry sites leading to a fitted peak at 446 nm and the other sites of 6h are contributed to the 479 nm emitting of Eu2+ ions. Remarkably, tunable chromaticity of DP-M5(PO4)3F: Eu2+ with high color purity (97.79%) retains steady photoelectric converting and full width at half maxima (FWHM) of 46 nm in the device of DP-FAp: 0.03Eu2+@365 nm LED under diverse driving currents, which perfectly satisfies the requirements of excitation light source for oral photocuring materials. Further, the 123.4% color gamut of National Television System Committee (NTSC) standard is efficiently obtained by matching Sr5(PO4)3F: Eu2+, CsPbBr3 and Lu3Al5O12: Mn4+ phosphors with a 365 nm chip (1 W) to achieve high-quality white light (CRI value reaches to 86, CCT is 7107 K and CIE chromaticity coordinate arrives at (0.292, 0.376), indicating a potential candidate for dentistry curing light and high-quality NUV excited pc-wLEDs.
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高影响因子
Materials Today Advances
·
2024
·
IF 8.1
Reziwanguli Yantake,Aierken Sidike,Wang Qingling,Zhou Shihang
Among the green-cyan phosphors widely used in white LEDs, the full width at half maximum, thermal stability and quantum efficiency are key performance indicators. This kind of phosphor should have stable peak shape and peak position when working at different temperatures. It should simultaneously exhibit ultrawideband emission, which is conducive to the realization of two-color white light and simplification of the preparation process of white LED devices. In this paper, a series of KAlSiO 4 :Eu 2+ , Mn 2+ luminescent materials were synthesized by a high-temperature recalcination strategy. Phase analysis and refinement results showed that the samples were effectively synthesized. After the first calcination, a bright green powder was obtained. The main emission peak was at 514 nm, and the FWHM was 30 nm. After recalcination, the color of the light emission from the representative samples changed from green to cyan-green, which was very close to white light, under near-UV irradiation. The emission range was wide, including blue and green light, and the full width at half maximum could reach 150 nm. After recalcination, the emission intensity of the representative samples increased by 3.4 times, and the quantum efficiency reached 90 % under near-UV excitation. The emission intensity at 150 °C was 82 % of that at room temperature. The Raman spectra showed that recalcination had a good effect on the lattice symmetry of the samples and promoted their luminescence intensity. The experimental value of the optical bandgap of the matrix was 5.6 eV, whereas the DFT-calculated bandgap was 4.8 eV, indicating good thermal stability. The chromaticity shift of the sample at high temperatures was very small, indicating good chromaticity stability. A commercial broadband red powder and representative samples after refiring were combined with 365 nm near-UV chips. The color rendering index of the white LED devices exhibited under different driving currents was greater than 90, indicating that the refiring strategy successfully improved the luminous performance of the representative samples. KAlSiO 4 :Eu 2+ , Mn 2+ phosphors were verified to have good application prospects in the field of white LED lighting. This work provides a new idea and technology for calcination and color control of luminescent phosphors.
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RSC Advances
·
2025
·Vol. 15
·期 27
·22154-22160
·
IF 4.6
Yuxuan Liang,Pengfei Du,Yanhong Wei,Xurui Hu,Xiaojie Li,Zhijun Wang,Jie Gong,Mengdi Liu,Panlai Li,Wenge Ding
In this work, a near-infrared (NIR) phosphor Ca0.8Sr0.2O:Eu2+ was prepared via a solid-state method, and its luminescence properties were improved by co-doping with Ce3+ ions. The decay curves of Ca0.8Sr0.2O:Ce3+, Eu2+ confirmed that there was an obvious energy transfer from Ce3+ to Eu2+, which enhanced the quantum efficiency of Ca0.8Sr0.2O:Eu2+. The thermal stability can also be enhanced by introducing Ce, which reduces the probability of non-radiative transitions at elevated temperatures, thereby minimizing electron loss. An NIR light emitting diode (LED) was fabricated by combining a blue LED chip with Ca0.8Sr0.2O:Ce3+, Eu2+, which was applied for the concentration detection of ethanol solutions.
研究领域:
材料科学
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光学工程
·
分析化学
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生物医学工程
·
传感器技术
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高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 12
·2500026
·
IF 10
Yeping Ge,Ming Zhao,Yifei Zhao,Xinping Zhang
Filling the cyan gap (470–500 nm) in white light-emitting diodes (WLEDs) is crucial for full-spectrum illumination. However, the traditional approach of adding cyan phosphor to red, green, and blue phosphors can lead to reabsorption and color aberrations due to spectral overlap and varying degradation rates among the mixed phosphors. Herein, a blue-cyan-emitting phosphor (λ em = 475 nm) is developed through Si 4+ -P 5+ heterovalent substitution in blue-violet-emitting Rb 3 Y(PO 4 ) 2 :Eu 2+ phosphor (λ em = 425 nm), which can serve as the blue component in WLEDs to fill the cyan gap without adding extra phosphor. Initially, Eu 2+ primarily occupy the Rb2O 12 sites (426 nm) in Rb 3 Y(PO 4 ) 2 :Eu 2+ , with minimal occupation in the Rb1O 7 sites (456 nm) and YO 6 sites (522 nm). The Si 4+ -P 5+ substitution results in a red-shift of the Eu 2+ @Rb1 emission peak from 456 to 475 nm and the preferred occupation of the Rb1 sites by Eu 2+ , synergistically achieving the blue-cyan luminescence. Employing the blue-cyan-emitting phosphor instead of the blue-violet-emitting phosphor in WLEDs significantly improves the color rendering index from 90 to 97.2, thus enhancing the overall color reproduction quality. This research demonstrates a facile composition modification method to modulate the properties of inorganic luminescent materials and provides an alternative solution for full-spectrum healthy lighting.
研究领域:
材料科学
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发光材料
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固态照明
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无机化学
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光电子学
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Laser & Photonics Reviews
·
2026
·
IF 9.7
Qianxing Huang,Chunliang Zhao,Jiaqi Cheng,Leqi Yao,Yan Dong,Chao Liang,Jinhua He,Jianqing Jiang,Qiyue Shao
Thermally induced interfacial reactions between nitride phosphors and glass matrices remain a critical bottleneck in the development of high-performance phosphor-in-glass (PiG) for high-power LED and laser-driven lighting applications. Herein, we address this challenge by the rational glass design to reconcile its glass transition temperature (T g ), structural stabilization and chemical compatibility. By establishing a correlation between structural evolution and interfacial diffusion, we develop a six-component glass matrix (CaF 2 -Al 2 O 3 -SiO 2 -B 2 O 3 -Na 2 O-P 2 O 5 ) featuring a low T g (∼453°C) and high chemical inertness. This glass matrix effectively alleviates the thermal degradation of embedded CaAlSiN 3 :Eu 2+ (CASN:Eu 2+ ) phosphors and suppresses interfacial reactions. The resulting CASN:Eu 2+ -PiG achieves a high internal quantum efficiency of ∼96%, and its fluorescence lifetime is relatively reduced by only 0.02 µs. A wLED incorporating Y 3 Al 5 O 12 :Ce 3+ and CASN:Eu 2+ in the PiG exhibits a high color rendering index of 90.4 while maintaining a luminous efficiency of 93.1 lm/W. Furthermore, by tuning the (Y,Gd) 3 Al 5 O 12 :Ce 3+ /CASN:Eu 2+ ratio in the PiG film, laser-driven amber light is achieved for specialized lighting, with a maximum luminous flux of 536.0 lm and a peak luminous efficiency of 101.6 lm/W. This work presents a universal strategy for designing chemically robust, low-melting glass to advance PiG applications in high-power solid-state lighting and specialty light sources.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
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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