Journal of Materials Chemistry C
·
2025
·
IF 5.1
Lishuo Huang,Renguang Ye,Youjie Hua,Yue Qi,Guoqing Jiang,Ruiming Tan,Tianzhi Jiang,Can Jin,Jingtao Zhao,Muzhi Cai,Bingpeng Li,Feifei Huang,Gongxun Bai,Shilong Zhao,Junjie Zhang,Shiqing Xu
Full-spectrum laser-driven white lighting shows promise for high-luminance solid-state illumination and is highly desirable for lighting application domains such as education, healthcare, and residential lighting. However, obtaining both a high color rendering index (Ra) and high luminous efficiency (LE) concurrently poses a great challenge for the development of laser-driven white lighting. Herein, a novel tricolor phosphor-in-glass film (PiGF) is designed and fabricated via a facile low-temperature co-sintering strategy. ZnO–Li2O–SiO2 (ZLS) glass along with Y3Al5O12:Ce3+ (YAG), CaAlSiN3:Eu2+ (CASN), and Lu3(Al, Ga)5O12:Ce3+ (LuAGG) phosphors was coated onto sapphire substrates via the blade-coating method and then subjected to low-temperature co-firing, fabricating composite phosphor-in-glass film (PiGF) samples for full-spectrum laser-driven white lighting. High LE and Ra were achieved by optimizing the glass layer thickness, phosphor concentrations, phosphor ratio, film structure, and sintering process. The YAG-PiGF achieves a high luminous flux (LF) of 1129 lm and a Ra of 62. Further addition of CASN and LuAGG phosphors fills the color gaps, resulting in a composite PiGF with a high Ra of 92 and a LE of 212 lm W−1. The excellent balance between Ra and LE makes this color converter highly promising for high-quality laser lighting applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Ma Ronghua,Wang Chunfeng,Mao Shaohui,Shao Yonghong,Wang Zhihao,Wang Yu,Peng Dengfeng
Under the excitation of ultraviolet, X-ray, and mechanical stress, intense orange luminescence (Mn2+, 4T1 → 6A1) can be generated in Mn2+-doped SrZn2S2O crystal in orthorhombic space group of Pmn21. Herein, the multiple energy conversion in SrZn2S2O:Mn2+, that is, photoluminescence (PL), X-ray-induced luminescence, and mechanoluminescence, is investigated. Insight in luminescence mechanisms is gained by evaluating the Mn2+ concentration effects. Under the excitation of metal-to-ligand charge-transfer transition, the most intense PL is obtained. X-ray-induced luminescence shows similar features with PL excited by band edge UV absorption due to the same valence band to conduction band transition nature. Benefiting much from trap levels introduced by Mn2+ impurities, the quenching behavior mechanoluminescence is more like the directly excited PL from Mn2+ d-d transitions. Interestingly, this concentration preference leads to varying degrees of spectral redshift in each mode luminescence. Further, SrZn2S2O:Mn2+ exhibits a good linear response to the excitation power, which makes it potential candidates for applications in X-ray radiation detection and mechanical stress sensing.
研究领域:
材料科学
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光学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Sai Lin,Ziwei Wang,Yijun Zhang,Yunyun Huang,Rongrong Yuan,Weidong Xiang,Yongqiang Zhou
Ag nanoparticles (NPs) show a excellent surface plasmon resonance (SPR), which is expected to enable fluorescence enhancement. In this study, a facile approach is proposed for fabrication of Ag NPs/long-wavelength carbon dots (Ag-LCDs) hybrids, wherein Ag NPs work as a fluorescent reinforcer to enhance photoluminescence (PL) intensity of LCDs. The largest enhancement was acquired through adjusting the volume ration between Ag NPs and LCDs. In this process, PL decay is considered as an important and simple characterization to speculate the metal enhanced fluorescence (MEF) mechanism. On the basis of result of small reduction in lifetime, we proposed that the mechanism may be predominantly derived from the localized effectric field effect and partly from the intrinsic radiative decay rate. Moreover, spin-coating technology was utilized to produce LCDs and Ag-LCDs hybrids films. Then, white light-emitting diodes (white LEDs) were constructed by these films with controllable thicknesses and GaN chips. The constructed white LED presented excellent optical performances with an optimal color coordinates (CIE) of (0.33, 0.35), a color rendering index (CRI) of 74.6, a correlated color temperature (CCT) of 5435 K. Notably, the existence of Ag NPs enable these LCDs to improve the luminous efficacy (LE) from 32.63 lm W −1 to 41.26 lm W −1 . Such superior optical merits enable them the promising potentials for application in optical devices.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2015
·
IF 2.252
Tianzhi Yu,Lijing Ma,Shupei Yu,Zixuan Xu,Yuling Zhao,Hui Zhang
Two new iridium(III) complexes containing the coumarin derivatives as cyclometalated ligands (L) and the carrier transporting group-functionalized dibenzoylmethane as ancillary ligands have been successfully synthesized and characterized. The X-ray crystal structure analyses of the free ligands and the complex containing a carbazole-functionalized dibenzoylmethane as ancillary ligand were described. The photophysical properties of the Ir(III) complexes were examined via ultraviolet-visible, photoluminescence spectroscopic spectra. The good thermal stability of the Ir(III) complexes was demonstrated by the thermogravimetric analysis. The doped light-emitting devices using the Ir(III) complexes as dopants were fabricated. The devices based on the complex containing a carbazole-functionalized dibenzoylmethane as ancillary ligand possess better performance as compared with the devices fabricated by the complex containing a 1,3,4-oxadiazole-functionalized dibenzoylmethane as ancillary ligand. The devices based on the former Ir(III) complex with a 15 wt% doping concentration exhibit a maximum efficiency of 13.8 cd/A and a maximum brightness of 4955.7 cd/m 2 .
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 46
·16634-16644
·
IF 7.393
Dangli Gao,Jie Gao,Feng Gao,Qingqing Kuang,Yong Pan,Yafei Chen,Zhengwei Pan
Traditional luminescent inks used in anti-counterfeiting applications usually consist of single-mode photoluminescence (PL) or up-conversion luminescence (UCL) materials, which are mainly operated in single-level, monochromatic anti-counterfeiting and can be easily counterfeited. Here we report the achievement of quintuple-mode, multi-colour dynamic anti-counterfeiting using multi-mode Zn3Ga2GeO8:Cr3+,Yb3+,Er3+ and Zn1.6Li0.4GeO4:Mn2+ persistent phosphors as the luminescent inks. The Zn3Ga2GeO8:Cr3+,Yb3+,Er3+ phosphors exhibit quintuple luminescence modes of PL, persistent luminescence (PersL), photostimulated luminescence (PSL), photostimulated persistent luminescence (PSPL) and UCL with rich emission colours, while the Zn1.6Li0.4GeO4:Mn2+ phosphors possess quadruple luminescence modes of PL, PersL, PSL and PSPL with a long perceptible green afterglow. A ‘dragonfly-on-lotus’ pattern printed using these multi-mode persistent phosphors shows dynamic evolution of emission colours and brightness under different luminescence modes. The design strategy reported in this study may lead to the design and development of more sophisticated optical anti-counterfeiting technology.
研究领域:
材料科学
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光学
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yi Zhang,Xihui Shan,Xulong Lv,Dongxun Chen,Shihai Miao,Weili Wang,Yanjie Liang
Discovering multimodal luminescent materials capable of being excited by diverse excitation sources and producing different wavelengths of light emission in a single material system remains a long-standing challenge. Herein, a Pr 3+ single-doped Li 2 CaSiO 4 phosphor is reported as an efficient multimodal luminescence material, which responds to convenient light sources including X-ray tube, 450 nm blue LED/laser, and white LED. Upon X-ray excitation, intense long-lasting red (>24 h) and ultraviolet-C (UVC, >12 h) persistent luminescence can be detected simultaneously, enabling a self-sustained glowing material suitable for working in both dark and bright environments. Significant enhancement of UVC afterglow is observed under the continuous photostimulation of white LED. Moreover, under the excitation of blue light, UVC upconversion luminescence is realized with the aid of unique energy levels of the Pr 3+ emitter. Besides, this material also exhibits exceptional white-to-brown photochromism performance in bright fields only in response to X-ray irradiation, accompanied by excellent bleaching and recovery capability upon thermal or blue light stimulation. The combination of persistent luminescence, photo-stimulated luminescence, upconversion luminescence and photochromism in this integrated multimodal luminescent Li 2 CaSiO 4 :Pr 3+ phosphor provides new and exciting directional solutions for multifunctional applications such as optical information storage and anti-counterfeiting.
研究领域:
材料科学
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光学工程
·
信息存储技术
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wanguo Liu,Fuyu Chen,Xiaogen Zhan,Peichang Ouyang
The developments of science and technology have made greenhouse plant cultivation increasingly valued, which has made the research on light sources of great significance, causing that deep-red-emitting phosphors have particular research prospects. In this work, Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ under high-temperature solid-state method is synthesized in air and Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ @PDMS film is prepared. Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ at room temperature shows deep-red emission in the range of 600 – 800 nm with photoluminescence (PL) peaks at ∼660 and 672 nm because of the 2 E g → 4 A 2g transition of Mn 4+ ion in octahedron [MnO 6 ] when it is excited by light from ultraviolet to green (250–540 nm). PL spectra of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ under different excitation wavelength and the time-resolved PL spectra at room temperature are investigated, which confirm one luminous center (Mn 4+ ). The good thermos-stability is proved by the temperature-dependent PL spectra. The potential applications of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ in plant growth lighting and polymer luminescent film are explored via absorption spectra of plants, PL spectrum of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ , and Li 1.6 Mg 1.6 Sn 2.8 O 8 :Mn 4+ @PDMS film.
研究领域:
材料科学
·
光学
·
植物生物学
·
固体物理
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Le Ma,Yang Hou,Jun Nie,Xiaoqun Zhu
The introduction of substituents affects the planarity of the molecule, resulting in different physical and chemical properties. This study synthesized four one-component visible light photoinitiators with different substituents derived from 1-naphthylamine. They were amine-free (BTX), primary amine (BTX-A), secondary amine (BTX-MA), and tertiary amine (BTX-DMA). The photophysical and photochemical properties were explored using UV–visible absorption spectroscopy combined with DFT theory computational simulations. They had excellent absorption properties in the visible light range ( ε : 3200–6300 L mol −1 cm −1 ). The structure of amine substitutions in the initiators showed different redshift phenomena. The maximum absorption wavelength of BTX in the visible region is 388 nm; only a 7 nm red shift occurred for the maximum absorption wavelength of BTX-DMA. While BTX-A had a maximum absorption wavelength of red shifting by 41 nm， the red shift for BTX-MA was about 53 nm, and its UV absorption tail extended to 520 nm. This phenomenon was known to be the result of the combined effect of electronic donor and molecular planarity according to the DFT theoretical calculations. The photopolymerization kinetics of four initiators used for double bond monomers was investigated by real-time FT-IR. The results indicated that polymerization could occur for all the designed systems; the highest double bond conversion could reach 92 % when BTX-DMA was used as a visible-light photoinitiator for the monomer of 2-hydroxyethyl acrylate (HEA).
研究领域:
材料科学
·
化学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Wenfeng Yuan,Xianke Sun,Meng Wu
A phosphor that emits both white light and broad near-infrared (NIR) light is of significant interest across various fields, as it enables both visual inspection and NIR spectroscopic detection. In this study, we designed Dy 3+ /Cr 4+ codoped CaLuGaO 4 phosphors that emit both white light and broad NIR light ranging from 1100 nm to 1700 nm when excited at 450 nm. The white light is produced by the 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 transitions of Dy 3+ . The broad NIR light arises from the 3 T 2 to 3 A 2 transition of Cr 4+ . Additionally, energy transfer from Dy 3+ to Cr 4+ occurs in the Dy 3+ /Cr 4+ codoped CaLuGaO 4 phosphors, allowing for tunable ratios of white light to NIR light by varying the concentrations of Dy 3+ and Cr 4+ . A phosphor-converted light-emitting-diode was constructed by encapsulating the synthesized phosphors around a commercial blue LED chip, demonstrating potential applications in lighting sources and non-destructive spectral analysis.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 24
·8457-8466
·
IF 4.39
Shao Yan,Yanjie Liang,Yafei Chen,Jingwei Liu,Dongxun Chen,Zhengwei Pan
Visible and infrared persistent phosphors have gained considerable attention in recent years and are being widely used as glow-in-the-dark materials in dark environments. In contrast, the progress in persistent phosphors emitting at the other end of the spectrum, i.e., the shorter-wavelength ultraviolet-C (UVC; 200–280 nm), is rather slow. Here we report the design and synthesis of a well-performing Pr3+-doped UVC emissive persistent phosphor, Lu2SiO5:Pr3+, which exhibits intense UVC persistent luminescence peaking at 270 nm and a long persistence time of more than 12 h after excitation with a 254 nm UV lamp. Besides, the UVC persistent luminescence of a UV pre-irradiated sample can be repeatedly revived after repeated short-illumination with low-energy white light via a process called photostimulated persistent luminescence. Owing to the distinct spectral features of UVC light and the self-sustained luminescence properties, the UVC persistent luminescence of the Lu2SiO5:Pr3+ persistent phosphor can be clearly monitored and imaged using a corona camera in bright environments including direct sunlight and indoor light. The Lu2SiO5:Pr3+ persistent phosphor is expected to find promising applications in the covert optical tagging field.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2016
·Vol. 21
·期 10
·1345
·
IF 2.465
Meng Shi,Ying Nie,Xin-Qiang Zheng,Jian-Liang Lu,Yue-Rong Liang,Jian-Hui Ye
Ultraviolet B (UVB) photosensitivities of eight catechins were screened. In both water and ethanol, epicatechin (EC, 575 μM) and catechin (C, 575 μM) exhibited low photostabilities under 6 h UVB radiation with the generation of yellow photoproducts, while other catechins (epigallocatechin gallate, epigallocatechin, epicatechin gallate, gallocatechingallate, gallocatechin, catechin gallate) were relatively UVB-insensitive. Photoisomerization and photolysis were two important UVB-induced reactions to EC whereas photolysis was the dominant reaction for C. The influencing factors of time (2–10 h), solvent (water, ethanol) and substrate concentration (71.875–1150 μM) on UVB-induced chemical conversions of EC and C were investigated, and eight photoproducts were identified through ultra performance liquid chromatography-diode array detection-tandem mass spectrometry (UPLC-DAD-MS/MS) and1H nuclear magnetic resonance (1H-NMR analysis). Photolysis reaction involved two pathways, including radical reaction and photo-induced electron transfer reaction. The 2,2-diphenylpicrylhydrazyl (DPPH) scavenging abilities of eight catechins did not change upon 6 h UVB irradiation. EC and C are photosensitive catechins among eight catechins causing deep color.Keywords:photostability;catechins;photoisomerization;photolysis;photoproducts
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）