JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 7
·6832-6837
·
IF 2.195
Li Chunzhe
A series of Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ and Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ /Mn 2+ phosphors were fabricated by a solid state reaction. The phase composition and luminescent properties of the fabricated phosphors were investigated. The XRD patterns show that Eu 2+ and Mn 2+ were doped into the Ca 3 La 6 (SiO 4 ) 6 host in the present experiment. The Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ phosphors show the emission band in blue region and the Ca 3 La 6 (SiO 4 ) 6 :Mn 2+ phosphors exhibit the emission band in yellow region. The excitation band of Ca 3 La 6 (SiO 4 ) 6 :Mn 2+ overlaps with the emission band of Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ that means a possibility for the energy transfer process from Eu 2+ to Mn 2+ in the Ca 3 La 6 (SiO 4 ) 6 :Eu 2+ /Mn 2+ phosphors. Tunable luminescence was obtained due to this energy transfer process and warm white light was emitted by Ca 3 La 6 (SiO 4 ) 6 :0.05Eu 2+ /0.04Mn 2+ and Ca 3 La 6 (SiO 4 ) 6 :0.05Eu 2+ /0.05Mn 2+ phosphors.
研究领域:
材料科学
·
无机化学
·
固体物理
·
发光材料
·
光学材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhi-Han Zuo,Ying-Ying Peng,Junhao Li,Xiaojun Wang,Zhao-Qing Liu,Yibo Chen
Color-tunable persistent luminescent materials that respond to external physical stimuli are fascinating but rarely reported, especially the dynamic ones. In this work, a dynamically color-tunable persistent luminescence by varying the ambient temperature is revealed in an all-inorganic singly-phase Cr 3+ , Mn 2+ co-doped zinc gallate spinel phosphor. The persistent luminescence shows dramatic color variation from green (∼503 nm) to deep red (∼709 nm) in 350 ∼ 650 K. The application potential of this phosphor for advanced anti-counterfeiting is verified by fabricating several multi-level anti-counterfeiting models, which work under both fluorescence and afterglow modes. Further, by detailed optical investigations and theoretical calculations, two factors are demonstrated to endow the persistent luminescence of the co-doped phosphor with temperature-dependent afterglow colors: the dual-traps electronic structure of the host and the different photoluminescence thermal quenching properties of the Cr 3+ /Mn 2+ emitters. This work reports the dynamic color-tunable persistent luminescence under different temperatures in Cr 3+ , Mn 2+ co-doped zinc gallate and provides a new perspective for the design of thermal-responsive dynamic optical materials for the application of advanced anti-counterfeiting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Yanling Hao,Zhixing Gan,Jiaqing Xu,Xinglong Wu,Paul K. Chu
Although carbon quantum dots (CQDs) possess excellent luminescence properties, it is a challenge to apply water-soluble CQDs to tunable luminescent devices. Herein, quaternary CQDs are incorporated into poly(ethylene glycol) to produce poly(ethylene glycol)/CQD composite solid films which exhibit strong and tunable blue–red emission. The fluorescent quantum yield reaches 12.6% which is comparable to that of many liquid CQDs and the photoluminescence characteristics are determined to elucidate the fluorescence mechanism. The CQD solid films with tunable optical properties bode well for photoelectric devices especially displays.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 22
·7397-7405
·
IF 4.174
Jie Chen,Yixin Gao,Haifeng Jiang,Yan Liu,Zhaohui Jin
Optimizing structure and varying doped ions are two main strategies to obtain excellent luminescence performance. Spherical morphology is considered to be the most ideal phosphor structure due to the least surface defects. Herein, a series of spherical and monodispersed Dy3+/Eu3+ co-activated SiO2@Gd2O3 core–shell phosphors with multicolor tunable luminescence were successfully prepared via a facile urea assisted precipitation method. Related chemical reactions and the possible growth mechanism of Gd2O3:Ln3+ directional deposition on the surface of SiO2 microspheres were put forward. Upon 273 nm UV radiation excitation, SiO2@Gd2O3:Dy3+ and SiO2@Gd2O3:Eu3+ samples exhibited characteristic yellow (4F9/2–6H13/2) and blue (4F9/2–6H15/2) emissions of Dy3+ and red (5D0–7F2) emission of Eu3+, respectively. Meanwhile, multicolor emissions (warm white, yellow and orange) could be easily obtained by modulating the relative content of Dy3+ and Eu3+ in SiO2@Gd2O3:Ln3+ samples under a single excitation wavelength. Moreover, it was confirmed that Dy3+ could transfer energy to Eu3+ in the form of quadrupole–quadrupole interaction and further improved the luminescence intensity of Eu3+ by comparing experimental data with theoretical calculations. These results imply that tunable luminescence Dy3+,Eu3+ co-doped SiO2@Gd2O3 microspheres have great potential applications in multicolor displays and biolabeling fields.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2011
·Vol. 11
·期 8
·6772-6778
·
IF 1.352
Wang Zhengjun,Zhou Pingle,Liu Jie,Wang Feijiu,Peng Yinjie,Yu Xibin
ZnO:LiAc nanopaticles were successfully synthesized though a colloidal-sol technique in nonaqueous solution under ultrasonic irradiation. The luminescent characteristics from blue to red can be tunable by varying [Li]/[Zn] ratios. The possible reason of tunable luminescent characteristics
can be attributed to the increase of density of oxygen vacancies caused by Li+ adsorbed in the surface of magic-sized ZnO nanocrystals based on XRD, zeta potential and XPS results. What's more, it is found that SiO2 shell coated on ZnO:LiAc nanoparticles can improve the
surface property of ZnO nanoparticles and enhance the PL emission intensity and optical stability. Due to its excellent luminescent characteristic and optical stability, as-prepared SiO2 coated ZnO:LiAc nanoparticles may be a promising candidate for some applications in high-efficiency
low-voltage phosphor, solar cells and biological luminescent labels.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 27
·10432-10440
·
IF 4.569
Shuang-Yin Zhu,Dan Zhao,Rui-Juan Zhang,Yan-Ping Fan,Wen Liu
Bi3+/Eu3+ co-doped phosphors can realize multi-color luminescence by adjusting the concentration ratio, which makes it possible to manually control the emission color. On this basis, a series of Bi3+/Eu3+ co-doped phosphors SrLaGa3O7:xBi3+,yEu3+ were prepared. The existence of energy transfer from Bi3+ to Eu3+ was verified by spectral analysis. The emission spectra of SrLaGa3O7:xBi3+ show a wide-band peaking at 472 nm. For SrLaGa3O7:xBi3+,yEu3+, the Bi3+ → Eu3+ energy transfer occurs and a series of sharp emitting peaks of Eu3+ can be observed simultaneously. The relative luminescence intensity of Bi3+ and Eu3+ can be modulated by changing the relative concentrations of Bi3+ and Eu3+. Using this mechanism, the color tunable luminescence of SrLaGa3O7:xBi3+,yEu3+ from cyan, through white to orange, and finally to red is realized. By using a 320 nm UV chip and SLG:0.06Bi3+,0.07Eu3+ white phosphor, a white light-emitting diode (WLED) lamp was fabricated with chromaticity coordinates of (0.3199, 0.3083) and a color rendering index Ra of 82. This indicates that the prepared sample is a very promising candidate in the LED field.
研究领域:
材料科学
·
发光材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 36
·9454-9460
·
IF 4.696
Zhiyong Mao,Zhijuan Lu,Jingjing Chen,Bradley D. Fahlman,Dajian Wang
In this work, tunable luminescence of dicalcium silicate doped with Eu2+ ions is demonstrated based on crystal engineering. Five types of dicalcium silicate polymorphs (γ-, β-, αL′-, αH′-, α-Ca2SiO4) are synthesized by incorporating a crystal-phase stabilizer (CPS), in order to afford variable accommodation frameworks for the Eu2+ activator. Tunable luminescence is observed as the polymorph transforms from one crystal form into another. In addition, the luminescence of Eu2+ in peculiar crystal-phase Ca2SiO4 hosts is further customized by crystal-site engineering, which regulates the coordination environment of Eu2+ in multiple types of Ca2+ sites. The luminescence properties of our Eu2+-doped dicalcium silicate polymorphs show promising prospects for LED lighting applications.
研究领域:
材料科学
·
光电子学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yongsheng Yang,Siyuan Tang,Da Chen,Changxing Wang,Bingli Gu,Xiameng Li,Feng Xie,Gang Wang,Qinglei Guo
In this study, red-emission graphene quantum dots (R-GQDs), with tunable emission wavelength , are synthesized and explored for applications in trace water sensing, white light emitting diodes (WLEDs) and information encryption . Systematic experiments and characterizations demonstrate that the as-fabricated R-GQDs possess homogeneous size, good crystallinity and high doping concentration of nitrogen and oxygen. Moreover, tunable multicolor light emissions of R-GQDs are demonstrated by simply adjusting the polarity of surrounding solvents. As a result, solid-state fluorescence films are successfully fabricated to construct a high-quality WLED, with the CIE (Commission International d′Eclairage) coordinates (0.352, 0.380) and color temperature of 5121 K. Besides, the water quenchable fluorescence of R-GQDs enables the fabrication of a trace water sensing platform, with the low detection limit of 0.034%. Finally, the potential of our prepared R-GQDs for the application in color visual information encryption is developed. This study may pave the way for the development of GQDs, especially in optically sensing, optoelectronics and anti-counterfeiting technology.
研究领域:
纳米材料学
·
光学传感
·
光电子学
·
分析化学
·
防伪技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 11
·9211-9222
·
IF 3.277
Bei Zhao,Li Yuan,Shanshan Hu,Xuemei Zhang,Xianju Zhou,Jianfeng Tang,Jun Yang
Novel Sc2Mo3O12:Ln3+ (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) phosphors have been synthesized via a one-step hydrothermal route using glycine (Gly) as a surfactant. The phosphors were characterized using X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), photoluminescence (PL), and luminescence decays. It was found that various surfactants had a profound influence on the crystal phase, morphology and emission intensity of the final products. Furthermore, the photoluminescence of Ln3+-doped Sc2Mo3O12 phosphors (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) was studied in detail. The energy transfer of MoO42− → Tb3+ (Dy3+) → Eu3+ and multicolor tunable emission occurred by changing the ratio of Tb3+/Eu3+ or Dy3+/Eu3+ under single wavelength excitation. Moreover, the energy transfer mechanism from Tb3+ (Dy3+) to Eu3+ was ascribed to dipole–dipole interactions and the energy transfer efficiency from Tb3+ to Eu3+ (95.3%) was higher than that from Dy3+ to Eu3+ (87.5%). Their tunable multicolor luminescence properties make Sc2Mo3O12:Ln3+ (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) phosphors suitable for many potential applications in the fields of color displays and fluorescent lamps.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
J. Zhang,Z.Y. Ma,J.G. Guo,G.M. Cai,L. Ma,X.J. Wang
Color-tunable phosphors based on a single host are superior to traditional mixed primary-color phosphors in fluorescent lamps, due to the better consistency of different color components in service. In this work, a series of Eu 3+ /Tb 3+ doped MgIn 2 P 4 O 14 phosphors were synthesized by a conventional solid state reaction method. The phosphors exhibit strong absorption around 254 nm with negligible absorption in the visible light region. Under the joint action of the co-activation, cross-relaxation, sensitization, and phonon-assistance, color-tunable reddish-orange-yellow-green-blue emission is achieved in MgIn 2 P 4 O 14 : Eu, Tb phosphors by adjusting the doping content, which demonstrates great potential for the application in fluorescent lamps.
研究领域:
材料科学
·
无机化学
·
光电子学
·
发光材料
·
固体物理
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 5
·1043-1051
·
IF 3.903
Yang Sen,Pan XiaoRui,Tang JianPu,Yao Chi,Yang DaYong
Supramolecular DNA hydrogels have been synthesized based on the assembly of DNA building-blocks such as branched DNA and long DNA chains. The structures and functions of sole-module DNA hydrogels remain limitations. New methodologies by integrating hybrid components are desired to expand the synthesis of DNA hydrogel. Herein, we synthesized a Ln 3+ -containing luminescent supramolecular hydrogel by employing the coordination and electrostatic interactions between lanthanide ions (Tb 3+ and Eu 3+ ) and linear single-stranded DNA (ssDNA). Through the coordination between ssDNA and Ln 3+ , a series of luminescent supramolecular hydrogels were synthesized, among which the Tb-G n /T n and Eu-T n hydrogels emitted the characteristic luminescence of Tb and Eu, respectively. The luminescent intensities of the hydrogels were adjusted by designing DNA sequences with programmable bases and chain lengths. Notably, the Tb/Eu co-doped luminescent supramolecular hydrogel displayed tunable luminescence from green to yellow by regulating the stoichiometric ratio of Tb/Eu. Moreover, the hydrogel had reversible luminescent stimulation responsiveness toward Ag + /L-Cys. We expected that the synthesis of Ln 3+ -containing luminescent supramolecular hydrogels enriched the strategies of the construction of DNA hydrogels, and promoted the development of stimuli-responsive supramolecular materials.
研究领域:
材料科学
·
化学
·
纳米技术
·
生物物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Mingjun Zhao,Chongyun Shao,Weichang Li,Danping Chen,Wei Chen
A strong near-infrared (NIR) fluorescent borate glass doped with tellurium (Te) clusters was developed, and spectral properties were studied. Under an oxidizing atmosphere, Te clusters could not be formed; however, under a reducing atmosphere, broadband Te-cluster NIR emission covering 600–1400 nm was successfully achieved, with a peak centered at 900 nm and a full width at half maximum (FWHM) of 270 nm. The findings demonstrated that adjusting the glass composition and TeO 2 doping concentration can significantly enhance the NIR emission of Te-doped borate glass. Furthermore, the study revealed that the photoluminescence performance of this material is highly sensitive to both temperature and excitation wavelength, demonstrating its potential for tunable luminescent properties. A NIR glass-converted LED (gc-LED) device was fabricated by integrating Te-cluster-doped borate glass with a commercial 460 nm LED, demonstrating its potential applications in night vision, non-destructive testing, and biomedical imaging. This research provides a theoretical foundation and technical pathway for developing novel ultra-broadband NIR emission glass materials .
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
近红外技术
✓ 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）