A5061371376- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- Advanced Photocatalysis Techniques
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Crystal Structures and Properties
- ZnO doping and properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Layered Double Hydroxides Synthesis and Applications
- Microwave Dielectric Ceramics Synthesis
- Inorganic Fluorides and Related Compounds
- Solid State Laser Technologies
- Advancements in Solid Oxide Fuel Cells
- Multiferroics and related materials
- Phase-change materials and chalcogenides
- Zeolite Catalysis and Synthesis
- Luminescence and Fluorescent Materials
Chongqing University
2019-2025
Archetype stuffed tridymites AM2O4 typically exhibit a polar P622-structure, characterized by MO4-tetrahedra arranged in UDUDUD ring topology, where U (up) and D (down) denote the orientation of with respect to plane grids. However, most adopt centrosymmetric structures due size mismatch between A-cation cavity [M2O4]n− anionic framework, which alters topology results centrosymmetry. Therefore, innovative strategies are pressingly needed design alternative topologies facilitate fine...
Abstract The rapid advancements in solid‐state lighting have underscored the need for efficient and thermally stable phosphors light‐emitting diode (LED) applications. Herein, a red phosphor CaSc 2 O 4 :Eu 2+ ( λ ex = 450 nm, em 650 nm) is synthesized employing non‐stoichiometric strategy to increase photoluminescence quantum efficiency (PLQY). Spectroscopic crystallographic properties analysis confirm that emission band originates from Eu ions occupying single Ca site with significant...
Inspired by transformation optics, we propose a new concept for plasmonic photocatalysis creating novel hybrid nanostructure with singularity. Our geometry enables broad and strong spectral light harvesting at the active site of nearby semiconductor where chemical reaction occurs. A proof-of-concept comprising Cu2ZnSnS4 (CZTS) Au-Au dimer (t-CZTS@Au-Au) is fabricated via colloidal strategy combining templating seeded growth. On basis numerical experimental results different related...
Mn4+-doped fluorides are renowned for their highly efficient narrow-band red emission, making them promising candidates white light-emitting diodes and wide-gamut displays. However, performance degradation at high power levels insufficient moisture resistance limit application. Herein, a millimeter-sized hexagonal Rb2GeF6:Mn4+ single-crystal phosphor with superior photoluminescence quantum efficiency (QE ≈ 97%) was synthesized via one-step saturated crystallization method. The single crystal...
The site-selective Al 3+ -to-Ga substitution in doubly ordered spinel Mg 4 (Ga/Al)SbO 8 :Mn 2+/4+ can manipulate the Mn distributions, thereby resulting a tunable emission color and controllable optical thermometry sensitivity.
The d10 metal oxides with low effective mass and high mobility of photoexcited electrons have received much attention in photocatalytic water splitting. However, there are still challenges practical application due to insufficient visible light absorption. Here, an unusual phenomenon the In2+ cation PtIn6(GeO4)2O PtIn6(Ga/InO4)2 a narrow band gap is systematically investigated using density functional theory calculations. According chemical bond analysis, final edge structure results from...
AB2O4-type spinel oxides were extensively investigated as prospective magnetic, photocatalytic, cathode, and host materials. Herein, a new Mg4InSbO8 was rationally designed structurally characterized by high-resolution X-ray powder diffraction (XRPD) in combination with neutron diffraction. crystallizes the Imma-superstructure lattice dimensions of = √2/2·aC, b 3√2/2·aC, c aC, where aC is parameter cubic (Fd3̅m) archetype spinel. The formation this hitherto unreported Imma-spinel...
In addition to enhancing the activity of already-known photocatalysts, developing new ones is always desired in photocatalysis, giving more opportunities approach practical applications. Most photocatalysts are composed d0 (i.e. Sc3+, Ti4+, Zr4+) and/or d10 Zn2+, Ga3+, In3+) metal cations, and a target catalyst Ba2TiGe2O8 containing both. Experimentally, it exhibits UV-driven catalytic H2 generation rate 0.5(1) μmol h-1 methanol aqueous solution, which could be enhanced 5.4(1) by loading 1...
Semiconducting photocatalytic overall water splitting and CO2 reduction are possible solutions to the emerging worldwide challenges of oil shortage continual temperature increase, key is develop an efficient photocatalyst. Most photocatalysts contain d0, d10 or d10ns2 metals, a guiding principle desired help distinguish outstanding semiconductors. Here, bimetal oxide In2Ge2O7 was selected as target. First, density functional theory (DFT) calculations point out that nonbonding O 2p orbitals...
Different from the common perspective of average structure, we propose that locally elongated metal–oxygen bonds induced by La3+-to-Y3+ substitution to a Lewis acid α-YB5O9 generate medium-strength basic sites. Experimentally, NH3- and CO2-TPD experiments prove La3+ doping α-Y1–xLaxB5O9 (0 ≤ x 0.24) results in emergence new sites increasing concentration modifies number, not strength, acidic The catalytic IPA conversion exhibits reversal product selectivity, i.e., 93% propylene for ∼90%...
Mn4+-doped fluorides are recognized as highly efficient narrow-band emission red phosphors, showing significant potential for use in white light-emitting diodes (wLEDs) and wide-gamut displays. Nevertheless, performance deterioration at high power levels inadequate moisture resistance limit their application many lighting scenarios. Herein, we synthesized a millimeter-sized hexagonal Rb2GeF6:Mn4+ single-crystal phosphor via one-step saturated crystallization method. The single crystal...
The A-site and oxygen-vacancy ordering in Sr 2 Nd Zn O 7 are inextricably linked, disrupting one would thus destroy the other. This compound is a mixed oxide ionic electronic conductor, exhibiting dominant conduction at elevated temperatures.
Structural order-disorder plays a decisive role in the physical properties of materials, such as magnetism, second-order harmonic generation, and ionic conductivity, it is thus widely utilized to manipulate crystal structure understand structure-property correlations. Herein, we report structural polymorphism, complex temperature-driven irreversible phase transition polar oxides (Sr1-xCax)SrZn2Ga2O7. The low-temperature (LT) crystallizes Pna21 with partial Zn/Ga ordering. Upon heating,...