CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Herui Zhao,Yanjie Zhang,Shiwei Yang,Chunwen Ye,Cong He,Yaqi Song,Yuxin Wang,Bojun Lin,Jingjie Yu
Dy 3+ and Eu 3+ co-doped phosphors have been emerged as potential candidate to generate high-quality white light under the ultraviolet (UV) or near ultraviolet (NUV) excitation for health and comfort lighting. Herein, K 2 Lu(WO 4 )(PO 4 ) crystal has been newly developed to accommodate rare earth ions, such as Dy 3+ and Eu 3+ ions, to achieve spectral tunability of high-quality white light. Under NUV excitation, Dy 3+ singly-doped K 2 Lu(WO 4 )(PO 4 ) phosphors exhibit the desired blue emission at 486 nm and yellow emission at 575 nm, attributed to the electric dipole transition 4 F 9/2 → 6 H 15/2 and the magnetic dipole transition 4 F 9/2 → 6 H 13/2 transitions of Dy 3+ ions, respectively. Interestingly, the emission color can be facilely adjusted from cold white light to pink light under 365 nm NUV excitation due to the co-doping of Eu 3+ ions in K 2 Lu(WO 4 )(PO 4 ): 0.05Dy 3+ sample. Further, the remote luminescent layers containing K 2 Lu(WO 4 )(PO 4 ): 0.05Dy 3+ , 0.20Eu 3+ phosphor can be printed on glass substrate by screen printing technique to generate high-quality white light with the correlated color temperature (CCT) of 5433 K and color rendering index (CRI) of 87. Moreover, the remote luminescent layers exhibit better heat dissipation performance compared to conventional encapsulated LEDs and can be used as a multicolor emitting candidate for high-power white LEDs.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Minzhong Li,Yahong Jin,Lifang Yuan,Bo Wang,Haoyi Wu,Yihua Hu,Feng Wang
The advent of near-infrared (NIR) afterglow in Cr3+-doped materials has stimulated considerable interest in technological applications owing to the sustainable emission of light with good penetrability. However, the development of Cr3+-free NIR afterglow phosphors with high efficiency, low cost, and precise spectral tunability is still an open question. Herein, we report a novel Fe3+-activated NIR long afterglow phosphor composed of Mg2SnO4 (MSO), in which Fe3+ ions occupy the tetrahedral [Mg–O4] and octahedral [Sn/Mg–O6] sites, giving rise to a broadband NIR emission spanning 720–789 nm. On account of energy-level alignment, the electrons released from the traps show a preferential return to the excited energy level of Fe3+ in tetrahedral sites through tunneling, leading to a single-peak NIR afterglow centered at 789 nm with a full-width at half-maximum (fwhm) of 140 nm. The high-efficiency NIR afterglow, showing a record persistent time lasting over 31 h among Fe3+-based phosphors, is demonstrated as a self-sustainable light source for night vision applications. This work not only provides a novel Fe3+-doped high-efficiency NIR afterglow phosphor for technological applications but also establishes practical guidance for rational tuning of afterglow emissions.
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Hui Zhu,Yuanyuan Zhao,Siqi He,Zhe Yang,Sha Ouyang,Yuexiang Xi,Chunli Xin,Maxim S. Molokeev,Ming Cheng,Xiaoyan Chen,Gemechu Deressa Edossa,Mao Xia,Zhi Zhou
Cr 3+ -activated near-infrared (NIR) phosphors have great potential in plant lighting, noninvasive detection, iris recognition, etc. Herein, an aluminoborate host material with a wide band gap (E g = 4.60 eV) and high Debye temperature is selected to prepare a NIR phosphor Al 5 BO 9 : Cr 3+ (ABO: Cr 3+ ). The phosphor exhibits typical intermediate crystal field luminescence and has a high degree of matching with plant phytochrome. The photoluminescence intensity at 150 °C retains 91.1 % at room temperature. In addition, the spectral redshift (730 nm–770 nm) is achieved through the crystal field modulation, which is beneficial to broaden its application scenarios, such as plant antiviral immunity, night vision and noninvasive detection. Finally, the rice cultivation experiment confirms that the supplement of NIR light promotes growth, stress resistance and leaf angle of rice seedlings.
研究领域:
材料科学
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植物学
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农业科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaodong Zhang,Xuyi Wang,Kun Nie,Ziyao Hu,Xiuqiang Duan,Ranran Zhou,Luoxin Wang,Lefu Mei,Hua Wang,Xiaoxue Ma
Hydroxyapatite (HAP) commonly undergoes doping with various dopants , leading to the emergence of new properties. In this study, HAP is co-doped by terbium (Tb) and europium (Eu) to impart HAP with photoluminescent properties. By controlling the Tb 3+ amount to 7.5 × 10 −5 mol unchanged, it is observed that when the doping amount of Eu 3+ reaches 4.0 × 10 −5 mol, the band gap measures 3.919 eV, with maximum fluorescence intensity. Notably, a dipole-dipole energy transfer type from Tb 3+ to Eu 3 was identified during this process. Concentration quenching occurs when the Eu 3+ amount exceeds 4.0 × 10 −5 mol. In addition, the Tb 3+ and Eu 3+ co-doped HAP demonstrates excellent thermal stability and a more comprehensive emission wavelength range than Tb 3+ -doped HAP or Eu 3+ -doped HAP. Considering these properties, Tb 3+ and Eu 3+ co-doped HAP phosphor and aramid/polyphenylene sulfide (ACFs/PPS) fiber paper are organically compounded, resulting in functional fabrics with excellent low-temperature stability. These available fabrics are made of luminescent crystals and fibers can be applied in fields such as high-performance textile testing. Notably, when a specific laser irradiates the damaged area of the textile, fluorescence is not detected by the detector. Moreover, Tb 3+ and Eu 3+ co-doped HAP has also been shown to be used in the light-emitting diode (LED) to produce the HAP-LED that emits warm white light without commercial phosphors. That expands the application of HAP in anti-counterfeiting, flexible wearables, high-performance textile testing, and semiconductor devices.
研究领域:
材料科学
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生物医学工程
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光学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ying Li,Jiyou Zhong
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) embedded in portable smart devices emerge as a new generation of NIR light sources for multifunctional applications. However, developing a NIR phosphor with ultrahigh efficiency, robust thermal stability, and wide-range spectral tunability remains a great challenge. Herein, a series of garnet-type Ca2GdMAMBGe3O12:Cr3+ (MA = Zn, Mg; MB = Sc, In) phosphors were designed and synthesized. Among them, the Ca2GdZnScGe3O12:Cr3+ phosphor was screened with a superior performance. Upon 465 nm excitation, this material exhibits a broadband emission with a peak centered at 795 nm and a near-unity internal quantum efficiency (IQE = 97%). The integrated emission intensity at 423 K can retain 83.4% of that at room temperature. Moreover, the emission peak can be tuned from 795 to 870 nm via varying the ratio of the [Na+–Gd3+] unit cosubstituting the [Ca2+–Ca2+] unit, and the IQE still maintains over 90% when the emission peak gradually shifts to 830 nm. Finally, the applications of the developed materials in nondestructive testing, information encryption, and organic matter analysis were demonstrated, which confirmed the feasibility of these materials in multifunctional spectroscopy applications.
研究领域:
材料科学
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光学工程
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生物医学工程
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分析化学
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光电子学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 34
·15098-15112
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IF 3.9
Zeng Daiwei,Li Zhou,Su Yue,Liu Chen-chen,Li Fang,Chen Jianxing,Lin Tengfei,Lin Cong,Zhao Chunlin,Gao Min,Wu Xiao,Wen Na,Chen Weisheng
As advanced optical storage materials, fluorescent hydrogels still face significant challenges in achieving multi-stimulus responsiveness and broad spectral tunability. This study presents a novel aggregation-induced emission (AIE)-active hydrogel system with dual fluorescence emission characteristics, synthesized via a facile one-pot approach. Through controlled freeze–thaw processing cycles, tetrakis(4-hydroxyphenyl)ethylene (TPE-4OH) and tetrakis(4-aminophenyl)ethylene (TPE-4NH 2 ) were successfully incorporated into the three-dimensional polymer matrix. The developed system demonstrates programmable fluorescence modulation through three distinct stimulus–response mechanisms: solvent composition (DMSO/H 2 O), pH variation (HCl/NaOH), and ion coordination (Fe 3 ⁺/EDTA). Notably, these stimuli enable precise individual or synergistic control over both fluorescence intensity and chromatic characteristics of the hydrogel system. Furthermore, fluorescence modulation precision was enhanced through proportional control of the dual fluorophores, enabling tunable ion recognition sensitivity and a spectral shift from blue to green emission. The integrated multi-stimulus responsiveness and reversible emission characteristics confer dual functionality to this hydrogel system: serving as a patterned substrate fabrication platform while demonstrating promising applicability in multidimensional encryption technologies, analyte-specific sensing probes, and smart optical devices. Graphical abstract Multistimuli-responsive hydrogel system with color changing capabilities.
研究领域:
材料科学
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光学存储
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荧光材料
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智能聚合物
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化学传感器
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Shengdong Ran,Yuzhe Chen,Haiyang He,Qingwen Zhang,Xiaohu Liu,Yi Wang
Smart wearable ophthalmic devices such as contact lenses have gained widespread interest owing to their compactness, portability, and versatility and have emerged as the most promising, non-invasive, wearable devices for the treatment and diagnosis of a variety of ocular diseases. While contact lenses for the treatment of congenital eye diseases such as color vision deficiency (CVD) are reported, they show limited spectral adjustment range and the unavailability of blocking harmful light such as high-energy blue light (HEBL). In this study, silver nanoparticle (AgNP) based multifunctional contact lenses that can correct various types of CVDs and filter out harmful light are developed. AgNPs are controllably assembled via short-peptide-induced diffusion-limited aggregation and then integrated into the contact lenses. By varying the sequence and concentration of the peptides, the extinction value of the nanoparticles can be broadly tuned in the 400–600 nm range. The multifunctional contact lenses thus show wide spectral tunability and are capable of efficiently correcting multiple CVDs and blocking HEBL. The contact lenses are found to have excellent biocompatibility with cell and animal tests. In conclusion, the multifunctional contact lenses provide a candidate for the correction of CVD and protection against HEBL, and pave the way for personalized wearable ophthalmic devices.
研究领域:
眼科学
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纳米技术
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zizhao Fu,Jie Zhao,Rui Jiang,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
I-III-VI alloyed quantum dots (QDs) have shown great application potential in many fields. At present, Al-based alloyed QDs have become a kind of ideal material of the color conversion layer of WLEDs because of their blue-emission, abundant raw material content, and the strong stability of Aluminum oxides. In this study, we synthesized blue-emitting CuAlSe 2 /ZnSe QDs and dual-emitting CuAlGaSe/ZnSe QDs by using hot-injection and one-pot method respectively, with a photoluminescence quantum yield (PL QY) of 46.75% and 68.79%. Their spectral tuning effect and the luminescence mechanism were investigated and discussed by changing the elemental molar ratios and nucleation temperature. By changing the Cu/(Al+Ga) and Al/Ga molar ratio, the emission wavelength of CuAlGaSe/ZnSe QDs was adjustable from 456 nm to 631 nm, with the Al and Ga competition mechanism in CuAlGaSe/ZnSe was also proposed. Finally, a single-component dual-emission CuAlGaSe/ZnSe WLED with a color rendering index (Ra) of 91.4 was prepared. This work demonstrated the superior fluorescence performance of multi-component QDs and the potential application of Al-based QDs in WLEDs.
研究领域:
材料科学
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纳米技术
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光电子学
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固态照明
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光谱学
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量子点
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合金半导体纳米晶体
✓ 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）