A5012505338- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Radiation Detection and Scintillator Technologies
- Luminescence and Fluorescent Materials
- Nuclear materials and radiation effects
- Perovskite Materials and Applications
- Crystal Structures and Properties
- Lanthanide and Transition Metal Complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Electrochemical sensors and biosensors
- Thermal Expansion and Ionic Conductivity
- 2D Materials and Applications
- Topological Materials and Phenomena
- Inorganic Fluorides and Related Compounds
- Advanced Condensed Matter Physics
- Enzyme-mediated dye degradation
- Semiconductor Lasers and Optical Devices
- Gas Sensing Nanomaterials and Sensors
- Atomic and Subatomic Physics Research
- Mineralogy and Gemology Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Solid-state spectroscopy and crystallography
Sun Yat-sen University
2017-2024
Shaanxi Normal University
2022
South China Agricultural University
2015
Here, we report the large-scale emission color tunability in Ba3La(PO4)3:Tb3+, Sm3+ (BLPO:TS) system based on detailed discussion concentration-driven selectivity of energy transfer (ET) channels from Tb3+ to Sm3+. It is induced by concentration-dependent 5D3 and 5D4 emissions different interaction mechanisms ET via channels. In diluted scenario, red efficiently sensitized channel, while concentrated case, contribution channel dominant. Therefore, simply adjusting doping concentrations Sm3+,...
Abstract Optical multiplexing based on luminescent materials with tunable color/lifetime has potential applications in information storage and security. However, the available reported so far still suffer from several drawbacks of low efficiency or poor stability, thus restraining their further applications. Herein, we demonstrate a strategy to develop efficient stable lanthanide coordination polymers (LCPs) luminescence as new option for optical multiplexing. Their multicolor emission green...
Abstract Transparent displays (TDs) rendering “levitating” images on screen have appeared as an emerging technology toward augmented/mixed reality applications. However, the traditional phosphor design and construction severely limited TD performance owing to lack of efficient narrow‐band blue emitters stable structure. Herein, novel (full width at half maximum: 32 nm) NaLi 3 SiO 4 :Eu 2+ with a peak 467 nm key emitter is explored, it sandwiched in layered film unique design. The devised...
The structure, luminescence and valence stabilities of Eu<sup>2+/3+</sup>-doped CaMgSi<sub>2</sub>O<sub>6</sub> are studied. varied colour responses to the temperature excitation wavelengths endow their potential application in anti-counterfeiting.
In this work, the morphology, composition, crystal, and electronic structure of Ca8Mg(SiO4)4Cl2 (CMSOC) prepared by a high-temperature solid-state reaction technique are characterized first. To investigate site occupancies Eu3+ Ce3+ in CMSOC, emission spectra under well-chosen wavelength excitations corresponding excitation monitoring specific emissions measured detail for singly doped samples with different concentrations. Two kinds or luminescence found. On basis chemical environments two...
The host structure and the synchrotron radiation VUV–UV luminescence properties of samples BaMg2Si2O7 (BMSO):Ln (Ce3+, Eu2+) at different doping levels temperatures were investigated in detail. Three important aspects are studied to elucidate samples: (1) vacuum referred binding energy (VRBE) scheme is constructed with electron BMSO bands Ce3+ Eu2+ impurity aim explain thermal stabilities emissions; (2) electron–vibrational interaction analysis on narrow emission indicates a weak...
Cationic tuning for lanthanide (Ce3+/Pr3+)-activated inorganic phosphors with stable, efficient, and fast-decay 5d-4f emissions has emerged as an important strategy toward the continuing pursuit of superior scintillators. The in-depth understanding cationic effects on photo- radioluminescence lanthanides Ce3+ Pr3+ centers is requisite rational tuning. Here, we perform a systematic study structure X-ray properties K3RE(PO4)2:Ce3+/Pr3+ (RE = La, Gd, Y) to elucidate underlying their 4f-5d...
Ce3+ and Eu2+ single- double-doped CaMgSi2O6 phosphors have been prepared by a high-temperature solid-state reaction approach. The VUV–UV–vis luminescence properties are investigated at cryogenic temperatures. dependencies of intensity lifetime on temperature discussed in detail, the different thermal-quenching characteristics revealed combined with VRBE scheme. Because energy barriers lowest 5d conduction band bottom, thermal quenching does not occur below about 505 K, but that arises above...
Ce3+-doped LiSr4(BO3)3 phosphors have been prepared by a high-temperature solid-state reaction method, and structural refinement of the host compound has performed. The excitation emission spectra in vacuum ultraviolet-ultraviolet-visible range at cryogenic temperatures reveal that Ce3+ ions preferentially occupy eight-coordinated Sr2+ sites LiSr4(BO3)3. Such experimental attribution is well corroborated calculated 4f-5d transition energies defect formation two distinct first-principles...
In this work, the crystal structure and electronic as well synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li6Y(BO3)3 (LYBO):Ce3+ phosphors were investigated in detail. The Rietveld refinement DFT calculation reveal P21/c monoclinic phase direct band gap LYBO compound, respectively. Only one kind Ce3+ 4f-5d transition is resolved terms low temperature VUV-UV excitation, UV-vis emission spectra decay curves. Furthermore, by constructing...
RbBaPO4:Eu2+ phosphors have been prepared by a high-temperature solid-state reaction method, and the structure was determined Rietveld refinement based on powder X-ray diffraction (P-XRD) data. Their VUV-UV-vis photoluminescence properties are systematically investigated with three objectives: (1) low-temperature spectra, we clarify site occupancies of Eu2+, demonstrate that doublet emission bands at ∼406 ∼431 nm originate from Eu2+ in Ba2+ [Eu2+(I)] Rb+ [Eu2+(II)] sites, respectively; (2)...
Eu2+ -, Mn2+ - and -Mn2+ -doped CaMgSi2 O6 phosphors have been prepared by a high-temperature solid-state reaction. Systematic investigation of the concentration- temperature-dependent luminescence showed that ions occupy two distinct sites in . Electron-vibration interaction (EVI) analyses revealed Huang-Rhys factors 4.73 2.82 as well effective phonon energies 313 383 cm-1 for sites. energy transfer is also discussed, its efficiency estimated lifetime spectra. The different thermal...
Abstract Optical multiplexing based on luminescent materials with tunable color/lifetime has potential applications in information storage and security. However, the available reported so far still suffer from several drawbacks of low efficiency or poor stability, thus restraining their further applications. Herein, we demonstrate a strategy to develop efficient stable lanthanide coordination polymers (LCPs) luminescence as new option for optical multiplexing. Their multicolor emission green...
We report a systematic study of the magnetoresistance, Hall effect, and electronic structure in an iodine-intercalated tungsten ditelluride (${\mathrm{WTe}}_{2}\mathrm{I}$) single crystal, which crystallizes centrosymmetric structure. ${\mathrm{WTe}}_{2}\mathrm{I}$ presents significant anisotropic magnetotransport behavior with magnetic field rotated $xz$ $yz$ planes violation Kohler's rule. Unexpectedly, nonsaturating linear magnetoresistance (LMR) was observed under parallel to $z$ axis...
Sm3+ and Ce3+ singly doped co-doped Sr3B2O6 phosphors are prepared via a high-temperature solid-state reaction method. The crystal structure phase purity characterized by X-ray diffraction (XRD) analyses. Sm3+-doped sample displays an emission in the orange-red region, with strongest line at about 648 nm possessing good luminescence thermal stability between 78 500 K. With increase content, concentration quenching is observed due to cross-relaxation (CR) processes among ions. Upon 340...
The VUV-UV-vis photoluminescence, X-ray radioluminescence, energy transfer dynamics of Ce 3+ and Eu 2+ in Sr 2 MgSi O 7 the dependencies 4f–5d transitions on local structure , Ba BaMg Si are discussed.
In this work, the coordination polyhedron stabilities and distributions of europium ions in Ca6BaP4O17 (CBPO) luminescent materials are investigated. The density functional theory (DFT)-based first principles calculation results show that PO4 tetrahedrons can tilt structure, which leads to atomic distortion O13 O12 CBPO Eu2+/Eu3+-doped systems. energy scale about ∼0.1 eV suggests polyhedrons easily influenced by dynamic factors. vacancy work as charge compensations CBPO:Eu3+, three lattice...
Palette for security. The “concentration palette” strategy enables the design of lanthanide-activated phosphors with temperature-responsive colour and orange intensity co-evolution, which are also used to fabricate superior security tag prototypes.