A5074344625- Luminescence Properties of Advanced Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Perovskite Materials and Applications
- Lanthanide and Transition Metal Complexes
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Radiation Detection and Scintillator Technologies
- Advanced Photocatalysis Techniques
- Gas Sensing Nanomaterials and Sensors
- Ammonia Synthesis and Nitrogen Reduction
- Microwave Dielectric Ceramics Synthesis
- Nuclear materials and radiation effects
- Glass properties and applications
- Molecular Junctions and Nanostructures
- Magnetism in coordination complexes
- bioluminescence and chemiluminescence research
- Advanced Chemical Sensor Technologies
- Solid-state spectroscopy and crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Crystallography and molecular interactions
- Hydrocarbon exploration and reservoir analysis
- Silicon Nanostructures and Photoluminescence
- Organic Electronics and Photovoltaics
- Solid State Laser Technologies
China Agricultural University
2023-2025
Sun Yat-sen University
2015-2024
Tianjin Medical University
2024
Tianjin University
2024
Civil Aviation University of China
2023-2024
Northwest University
2023-2024
Nanjing Agricultural University
2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Hebei University of Science and Technology
2024
Fuzhou University
2022-2024
White light-emitting diodes (WLEDs) with high luminous brightness, low energy consumption, long lifetime and environmental friendliness can be applied in various fields. In order to improve the quality of white light, red phosphors are necessary.
Two photoluminescent two- and three-dimensional coordination polymers consisting of Zn4O [or Zn4(OH)2] cores, dicarboxylate (isophthalate or fumarate) 4,4′-bipyridine ligands as building blocks have been hydrothermally synthesized structurally characterized.
The Ce3+ → Tb3+ Eu3+ energy-transfer process enables Eu3+5D0 7FJ line emission to be sensitized by the allowed 4f1 5d1 absorption transition in near-ultraviolet (NUV) and violet spectral regions. This strategy is applied Y2SiO5:Ce3+, Tb3+, powders, leading line-emitting red phosphors that can excited short-wavelength InGaN LEDs. blue, green, colors tuned ratio of Ce3+/Tb3+/Eu3+. Furthermore, efficiencies corresponding mechanisms are discussed detail, thermal stability evaluated. results...
K<sub>2</sub>Tb<sub>0.5</sub>Eu<sub>0.5</sub>(PO<sub>4</sub>)(WO<sub>4</sub>) red phosphor with an internal quantum efficiency of 76.45% is produced. Furthermore, the luminescence colour can be tuned from green to by adjusting ratio Tb<sup>3+</sup> and Eu<sup>3+</sup>.
A single-phase white light phosphor, Gd 2 Sr 3 B 4 O 12 :Ce 3+ ,Tb ,Sm , with balanced and preferable comprehensive performances has been developed by energy transfer, suggesting its potential value in the applications of WLEDs.
A photoluminescent inorganic−organic material formulated as [Zn3(μ3-OH)(μ2-OH)(4,4'-bpy)0.5(4,4'-oba)2]·0.5H2O (4,4'-bpy = 4,4'-bipyridine; 4,4'-oba 4,4'-oxybis(benzoate)), shown by X-ray diffraction, features a novel polynuclear zinc helical chain motif. Linkage of mixed organic ligands and chains results in 3-D network.
Energy migration (energy transfer among identical luminescence centers) is always thought to be related the concentration quenching in materials. However, novel Eu3+-doped Ba6Gd2Ti4O17 phosphor seems an exception. In series of Ba6Gd2(1- x)Ti4O17: xEu3+ ( x = 0.1, 0.3, 0.5, 0.7, and 0.9) phosphors prepared investigated, no found. Detailed investigations crystal structure properties reveal that nonoccurrence dimensional restriction energy inside lattices. Ba6Gd2Ti4O17, directly increasing...
Eu3+ ion can be effectively sensitized by Ce3+ through an energy-transfer chain of Ce3+-(Tb3+) n-Eu3+, which has contributed to the development white light-emitting diodes (WLEDs) as it favor more efficient red phosphors. However, simply serving for WLEDs one multicomponents, design n-Eu3+ energy transfer is undoubtedly underused. Theoretically, light achieved with extra blue and green emissions released from Tb3+. Herein, based on these three multicolor luminescence centers been realized in...
Phase transitions induced by activator concentration should be avoided in most cases because they usually degrade luminescent properties of inorganic phosphors. However, the LaSc3(BO3)4:xEu3+ (LSBO:xEu3+) phosphors investigated here, a delayed quenching luminescence caused Eu3+-induced phase transition from monoclinic α-LSBO to trigonal β-LSBO is proved via XRD refinements, photoluminescent spectra, fluorescence decay curves, and Raman spectra. Increasing doping Eu3+ within x lower than 0.8...
Effectively identifying and managing the priority regulation areas (PRAs) of ecosystem services (ESs) are very important for improving supply–demand relationship (SDR) ESs promoting regional sustainable development. Based on InVEST model, geographic information system (GIS) spatial analysis statistical methods, this study assessed supply demand five types in Loess Plateau from 2000 to 2020, namely, water yield, food supply, carbon storage, soil conservation recreation. The quantitative...
The application of white LEDs is hindered by the low efficiency commercial red phosphors. Here, a novel narrow-line phosphor produced terbium chain in form Ce3+–(Tb3+)n–Eu3+ Na2Y2B2O7 host and characterized with X-ray diffraction, photoluminescence (PL), PL excitation (PLE), fluorescence lifetime, energy transfer (ET) processes between rare-earth ions are discussed. formation quite content Tb3+ realized ET Ce3+–Tb3+ Tb3+–Eu3+, new concept saturation distance put forward as an explanation for...
MgF<sub>2</sub> assisted delicate synthesis and application of a bright moisture-resistant LAG:Mn<sup>4+</sup>,Mg<sup>2+</sup> phosphor.
Energy-transfer-based multi-colour emissions in YGa<sub>1.5</sub>Al<sub>1.5</sub>(BO<sub>3</sub>)<sub>4</sub>:Tb<sup>3+</sup>,Eu<sup>3+</sup> for WLEDs.
Energy transfer from Ce<sup>3+</sup> to Sm<sup>3+</sup> in orthosilicate host enhances the luminescence and shows promising application white LEDs.
A series of Ca3Y(GaO)3(BO3)4:Tb3+,Eu3+ phosphors were prepared by a high-temperature solid-state reaction. Their phase structures confirmed powder X-ray diffraction and the element distribution was measured using transmission electron microscopy elemental mapping. The photoluminescence emission excitation spectra fluorescence lifetime studied discussed in detail. results revealed that Eu3+ ions can be efficiently sensitized Tb3+ under near-UV excitation. In addition, energy transfer...
A single-component white phosphor was realized <italic>via</italic> Eu<sup>3+</sup>-Doping inside Sr<sub>3</sub>ZnTaO<sub>9</sub>(SZT). Eu<sup>3+</sup>-doping induces structural variations of SZT and its luminescence emission intensity is remarkably enhanced color rendering consequently improved.
Abstract A solvent‐vapor transport route produces centimeter‐sized single‐crystal red phosphors. The epitaxial growth to yield its core–shell structure at ambient temperature was adopted. These phosphors could be applied in all‐inorganic WLED devices. Cs 2 TiF 6 :Mn 4+ (CTFM) single crystal provides enhancement of quantum efficiency, moisture resistance, and thermal stability compared polycrystalline powders. internal efficiency can reach as high 98.7 %. To further improve waterproof...
A single phase color-tunable white light emitting Ca<sub>8</sub>ZnLu(PO<sub>4</sub>)<sub>7</sub>:Eu<sup>2+</sup>,Mn<sup>2+</sup> phosphor with high color rendering index has been rationally designed <italic>via</italic> combination of cyan and red emissions.
Due to the presence of Nb 5+ , a Mn 4+ -doped compound (denoted as CNOFM) shows very good waterproof stability, even without any surface modification. Warm WLEDs with high color rendering index have been fabricated using CNOFM red phosphor.