A5100624319- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Radiation Detection and Scintillator Technologies
- Luminescence and Fluorescent Materials
- Microwave Dielectric Ceramics Synthesis
- Nuclear materials and radiation effects
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- bioluminescence and chemiluminescence research
- Quantum Dots Synthesis And Properties
- Glass properties and applications
- Solid State Laser Technologies
- Chemical Synthesis and Characterization
- Solid-state spectroscopy and crystallography
- Neural Networks and Reservoir Computing
- Random lasers and scattering media
- Inorganic Fluorides and Related Compounds
- Polyoxometalates: Synthesis and Applications
- Inorganic Chemistry and Materials
- Power Systems and Renewable Energy
- Orbital Angular Momentum in Optics
- Carbon and Quantum Dots Applications
- Advanced Sensor and Energy Harvesting Materials
Hunan Normal University
2015-2024
Shanghai University
2021-2023
Hunan University
2021-2023
Chongqing University of Technology
2023
Qilu University of Technology
2022
Changsha University
2015-2020
China Resources (China)
2020
China Medical University
2017-2019
Center for Excellence in Brain Science and Intelligence Technology
2019
Chinese Academy of Sciences
2006-2019
Ba1.8–xSrxSiO4:0.1Ce3+,0.1Na+ (x = 0–1.8) phosphors were prepared by a high-temperature solid-state reaction. The emission peaks of shift from 391 to 411 nm with increasing Sr2+ content under excitation UV light at around 360 nm. Ba0.4Sr1.4SiO4:0.1Ce3+,0.1Na+ phosphor exhibits the best performance luminescence, whose absolute quantum efficiency is 97.2%, and intensity 150 °C remains 90% that room temperature. effect replacing Ba2+ on red band increase (QE) thermal stability (TS) was...
A green and high-efficiency method was developed to prepare low-cost high-quality graphene on a large scale through direct exfoliation of graphite in aqueous media using tannic acid (TA) as the stabilizer. The influence preparation parameters concentration (CG) efficiency (CG/CG,i), including TA (CTA), initial (CG,i), pH, ionic strength, sonication time, cycles, systematically investigated. Under optimum conditions, highest CG that can be attained is 1.25 mg·mL–1 with CG/CG,i equal 2.5%, 92%...
Photoluminescence quantum efficiency (QE) and thermal stability are important for phosphors used in phosphor-converted light-emitting diodes (pc-LEDs). Li4Sr1+xCa0.97-x(SiO4)2:0.03Ce3+ (-0.7 ≤ x 1.0) were designed from the initial model of Li4SrCa(SiO4)2:Ce3+, their single-phased crystal structures found to be located composition range -0.4 0.7. Depending on substitution Sr2+ Ca2+ ions, absolute QE value blue-emitting composition-optimized Li4Sr1.4Ca0.57(SiO4)2:0.03Ce3+ reaches ∼94%,...
Modulating the local environment around emitting ions with component screening to increase quantum yield and thermal stability is an effective promising strategy for design of high-performance fluorescence materials. In this work, smaller Lu3+ was introduced into La3+ site in a Mn4+-activated LaAlO3 phosphor expectation improving luminescence properties via lattice contraction induced by cation substitution. Finally, La1–xLuxAlO3:Mn4+ (x = 0–0.04) perovskite high 86.0% satisfactory achieved,...
Broadband ultraviolet (UV) excitation and red/far-red emission phosphors can effectively convert solar spectrum to enhance photosynthesis promote morphogenesis in plants. Based on the above application requirements, Eu3+ single-doped LaAl1-yGayO3 solid solutions Eu3+,Mn4+ codoped LaAl0.7Ga0.3O3 were designed synthesized this work. The LaAl0.7Ga0.3O3:0.05Eu3+ (LAG:Eu3+) phosphor exhibits a strong charge transfer band (CTB) characteristic 5D0 → 7F2 transition red (619 nm), which is very...
This work achieves dual-mode light- and heat-responsive step-by-step coloration via trap engineering in the Ba5(PO4)3Cl:Eu2+,Ce3+,F– (BPCF) phosphor. A three-step calcination (BPCF-III) strategy promotes redistribution of multitraps balances three color-centers to facilitate photoinduced electron transfer processes. The BPCF-III shows controllable color tunability due distinct energy stimulation for each color-center with different depths. powder changes from white red after 254 nm...
A series of color-tunable Ce3+ single-doped and Ce3+, Mn2+ codoped Ca2.5Sr0.5Al2O6 phosphors were synthesized by a high-temperature solid-state reaction. The crystal structure, luminescent properties, energy transfer studied. For Ca2.5Sr0.5Al2O6:Ce3+ obtained with Al(OH)3 as the raw material, three emission profiles observed. peak photoluminescence (PL) spectra excited at ∼360 nm shifts from 470 to 420 nm, while that PL 305 stays unchanged increase content. Furthermore, is situated 500 under...
Novel color-tunable and white-emitting K<sub>2</sub>BaCa(PO<sub>4</sub>)<sub>2</sub>:Eu<sup>2+</sup>,Mn<sup>2+</sup> phosphors with external quantum efficiency of 70% were developed for NUV LED.
Ce3+/Eu2+, Tb3+ and Mn2+ co-doping in single-phase hosts is a common strategy to achieve white-light phosphors via energy transfer, which provides high color rendering index (CRI) value good stability. However, not all are suitable for due inefficient transfer. In this study, the site-sensitive transfer from different crystallographic sites of Ce3+ Tb3+/Mn2+ Ca3Al2O6 has been investigated detail. The purplish-blue an electric dipole–dipole mode, calculated critical distance (Rc) suggests...
Highly efficient and stable white emission is realized in a single-doped K<sub>2</sub>Ca(PO<sub>4</sub>)F:Eu<sup>2+</sup> phosphor with Eu<sup>2+</sup> on both K<sup>+</sup> Ca<sup>2+</sup> sites.
Ca<sub>2</sub>Sr(PO<sub>4</sub>)<sub>2</sub>:Ce<sup>3+</sup>,Mn<sup>2+</sup>,Na<sup>+</sup> with n-UV-to-red conversion is favorable for the anti-aging ability of agricultural films and promotes plant growth, showing potential application in agriculture.
The tetravalent-state stability of manganese is primary importance for Mn4+ luminescence. Double perovskite-structured A2B'B″O6:Mn4+ has been recently prevalent, and the ions are assumed to substitute B″(IV-VI)O6 site stabilize at tetravalent charge state generate far-red emissions. However, some Mn-doped A2B'B″O6-type materials show no or weak luminescence such as typical Ca2MgWO6:Mn. In this work, a cation-pair co-substitution strategy proposed replace 2Ca2+ by Na+-La3+ form...
High-efficint LiGaGe 2 O 6 :Cr 3+ NIR phosphor is explored, and the quantum efficiency could be boosted by Sc-Ga substitution.
A novel approach is described for preparing anti-oil-fouling superhydrophobic surfaces. These are produced via the coating of textured hydrophobic zinc oxide on polydimethylsiloxane films to form composite coatings. The surfaces showed as well superoleophilic wetting with measured contact and sliding angles water near 160° less than 5°, respectively, 5° dodecane. It demonstrated that subsequent fouling structured significant levels an alkane liquid (oil), oil rapidly self-removed, restoring...