A5061699092- Ferroelectric and Piezoelectric Materials
- Advanced Photocatalysis Techniques
- Multiferroics and related materials
- Dielectric properties of ceramics
- 2D Materials and Applications
- Microwave Dielectric Ceramics Synthesis
- Diamond and Carbon-based Materials Research
- Electronic and Structural Properties of Oxides
- Photonic and Optical Devices
- Cancer-related gene regulation
- Copper-based nanomaterials and applications
- Optical Coatings and Gratings
- Perovskite Materials and Applications
- Semiconductor materials and devices
- Quantum Dots Synthesis And Properties
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Graphene research and applications
- TiO2 Photocatalysis and Solar Cells
- Thin-Film Transistor Technologies
- Transition Metal Oxide Nanomaterials
- Plasmonic and Surface Plasmon Research
- Luminescence Properties of Advanced Materials
- Geothermal Energy Systems and Applications
Institute of Information Engineering
2018-2025
Chinese Academy of Sciences
2014-2025
Beijing Academy of Agricultural and Forestry Sciences
2025
Soochow University
2015-2024
Chongqing University
2011-2024
Chinese Academy of Agricultural Sciences
2023-2024
Shihezi University
2023-2024
Institute of Crop Sciences
2023-2024
Ministry of Agriculture and Rural Affairs
2023-2024
Xinjiang Production and Construction Corps
2024
The use of reactive electropositive metal contacts is proposed to lower contact resistance in MoS2 devices, based on calculations the sulfur vacancy by screened exchange (sX) hybrid functional. sX gives band gaps 1.88 eV and 1.34 for monolayer bulk MoS2. S has a formation energy 2.35 S-rich conditions, while Mo large 8.02 Mo-rich conditions. introduces defect levels 0/−1 at 1.23 −1/−2 1.28 upper gap. Its becomes small or negative EF near conduction edge, leading pinning resistances.
BiFeO3 (BFO) is of considerable interest because its potential applications in the design devices combining magnetic, electronic, and optical functionalities. Effects Gd dopant on structural, photocatalytic activity, ferromagnetic properties BFO nanoparticles have been studied. X-ray diffraction Raman spectra results Bi1−xGdxFeO3 (BGFOx, x = 0, 0.05, 0.1, 0.15) reflect that crystal structure samples remain stable for < while compositional-driven phase transition from rhombohedral to...
All‐inorganic perovskite CsPbX 3 (X = Cl, Br, I) and related materials are promising candidates for potential solar cells, light emitting diodes, photodetectors. Here, a novel architecture made of /ZnS quantum dot heterodimers synthesized via facile solution‐phase process is reported. Microscopic measurements show that heterodimer has high crystalline quality with enhanced chemical stability, as also evidenced by systematic density functional theory based first‐principles calculations....
Ferroelectric materials for photovoltaics have sparked great interest because of their switchable photoelectric responses and above-bandgap photovoltages that violate conventional photovoltaic theory. However, relatively low photocurrent power conversion efficiency limit potential application in solar cells. To improve performance, strategies focus mainly on narrowing the bandgap to better match spectrum, leaving fundamental connection between polar order effect largely overlooked. We report...
Because of the existence interface Schottky barriers and depolarization electric field, ferroelectric films sandwiched between top bottom electrodes are strongly expected to be used as a new kind solar cells. However, photocurrent with typical order μA/cm(2) is too low practical. Here we demonstrate that insertion an n-type cuprous oxide (Cu(2)O) layer Pb(Zr,Ti)O(3) (PZT) film cathode Pt contact in ITO/PZT/Pt cell leads short-circuit increasing 120-fold 4.80 mA/cm(2) power conversion...
A triangular Dy(III) single-molecule magnet (SMM) exhibiting ferroelectric bistability is assembled in an acentric space group Pna21. Hysteresis loops associated with its SMM behavior together a two-step slow relaxation of the magnetization are observed below 30 K. transition dielectric anomalies between paraelectric and phase occurs at 470
Bi 1 − x Eu FeO 3 (BEFOx) nanoparticles have been synthesized by a sol-gel method. The samples maintain the pure rhombohedral structure up to x=0.1, while an impure phase of EuFeO3 is observed at x=0.15. remenant magnetization BEFOx, which significantly higher than those in nonmagnetically rare-earth doped BiFeO3, found increase with concentration. Ferromagnetic coupling between Eu3+ and Fe3+ ions, evidenced our first-principles calculations, be main reason for such enhancement. In mean...
We developed a pulsed current deposition method to fabricate TiO2 inverse opals with highly dispersed Ag nanoparticles (NPs) as visible light driven plasmonic photocatalyst. It is observed that the incorporation of NPs can significantly improve photocatalytic activity in region. The sample time 45 s has highest measured activity, and exceeds Ag/TiO2 prepared by photochemical reduction method. Such an enhancement ascribed optimized localized surface plasmon resonance property NPs, excellent...
A series of oriented rutile TiO2 nanorod-array films are in-situ grown on fluorine-doped tin oxide (FTO) coated glass substrates from a mixed acid solution containing titanium tetraisopropoxide (TTIP), hydrochloric (HCl), acetic (HOAc), and water (H2O) by means hydrothermal reaction at 150 °C. The effect HOAc in the titania growth structure micro-morphology nanorod array films, as well photoelectric conversion properties dye-sensitized solar cells (DSSCs) has been fully investigated. It is...
Water splitting in a photoelectrochemical cell, which converts sunlight into hydrogen energy, has recently received intense research. Silicon is suitable as viable light-harvesting material for constructing such cell; however, there need to improve its stability and explore cheap efficient cocatalyst. Here we fabricate highly stable photocathodes by integrating crystalline MoS2 catalyst with ∼2 nm Al2O3 protected n+p-Si. acts protective passivative layer of the Si surface, while sputtering...
Metal nanoclusters have recently attracted extensive interest from the scientific community. However, unlike carbon-based materials and metal nanocrystals, they rarely exhibit a sheet kernel structure, probably owing to instability caused by high exposure of atoms (particularly in relatively less noble Ag or Cu nanoclusters) such structure. Herein, we synthesized novel AgCu nanocluster with sandwich-like (diameter≈0.9 nm length≈0.25 nm) introducing furfuryl mercaptan ligand (FUR) alloying...
Anisotropic uniform single-crystal nanostructures of α-MoO3 have been synthesized successfully via a novel green and facile approach, i.e., decomposition condensation peroxomolybdic acid under hydrothermal conditions. The structure morphology the products were characterized by means X-ray diffraction, transmission electron microscopy, selected area high-resolution scanning thermogravimetric/differential thermal analysis, temperature programmed decomposition-mass spectrometry, Fourier...
BiFeO 3 nanoparticles were synthesized by a sonochemical method and their magnetic behavior was investigated both experimentally theoretically. With an aid of ultrasonic irradiation, the saturated magnetization BiFeO3 at room temperature found to be increased effectively, from 0.007 0.012 μB/Fe. The postannealing x-ray photoemission spectroscopy results demonstrate that oxygen vacancies can generated due irradiation play important role increase ferromagnetism. Our first-principles...
Pb(Zr,Ti)O3 (PZT) film with a band gap of 3.6 eV was prepared on In2O3:Sn (ITO) coated glass, and then an amorphous silicon (a-Si) narrow 1.8 deposited the PZT/ITO/glass. The short-circuit current Ag/a-Si/PZT/ITO/glass sample is 2.56 mA cm−2, about 50 times greater than that Pt/PZT/ITO/glass sample. energy level a-Si well matched PZT film, which beneficial to transport UV-visible light-induced charges in photovoltaic output can be tuned by changing dopant type maximum photoelectric...
EuFeO 3 (EFO) nanoparticles were prepared by sol–gel method with an aid of tartaric acid at different calcination temperatures. The EFO samples characterized differential thermal analysis–thermogravimetry, X‐ray diffraction, Fourier transform infrared spectra, Raman transmission electron microscopy, UV‐visible diffuse reflectance spectrum, N 2 adsorption/desorption measurements, and photoluminescence spectra. photocatalytic activity the was evaluated decolorization rhodamine B aqueous...
A facile sol–gel approach with a fixed calcination temperature is developed to prepare BiFeO3 (BFO) nanoparticles, and the gel-drying adjusted control appearance of γ-Fe2O3 parasitic phase. The room ferromagnetism samples strongly dependent on temperature. When increases from 80 140 °C, saturated magnetization corresponding jumps 0.22 emu g−1 1.2 g−1, allowing nanoparticles be magnetically separated in solution. From examination by transmission electron microscopy X-ray photoelectron...
Polycrystalline BiFeO3 (BFO) films are fabricated on Pt/Ti/SiO2/Si(100) substrate as photoelectrode using sol-gel method. The microstructure, optical, and photoelectrochemical (PEC) properties of the characterized optimized by controlling film thickness. Moreover, PEC BFO dependent ferroelectric polarization, which is mainly ascribed to modulation band structure at BFO/electrolyte interface polarization. Further enhancement obtained decorating samples with appropriate amounts Ag...
The switchable photovoltaic effect in BiFeO3 thin films capacitors has been studied extensively. However, the origin of response is still under debate. Both bulk depolarization field and interface effects have used to explain observations. In this work, we fabricate epitaxial on SrTiO3 substrate with La0.7Sr0.3MnO3 Pt as electrodes. Much larger can be observed Pt/BiFeO3/La0.7Sr0.3MnO3 samples, compared La0.7Sr0.3MnO3/BiFeO3/La0.7Sr0.3MnO3. Moreover, voltage samples nearly independent...
Solar steam generation provides a renewable and environmentally friendly approach to solve the water shortage issue. The pursuit of efficient, stable, cheap photothermal agents is thus great significance. In this work, Cu nanoparticles (NPs) fabricated simply by substitution reaction, exhibit near-unity (∼97.7%) light absorption, covering broad incident angle wavelength range (200–1300 nm). Thereby, high conversion efficiency 93% achieved. excellent performance offers unique opportunity for...
Carbon quantum dots (CQDs) coated BiVO4 inverse opal (io-BiVO4) structure that shows dramatic improvement of photoelectrochemical hydrogen generation has been fabricated using electrodeposition with a template. The io-BiVO4 maximizes photon trapping through slow light effect, while maintaining adequate surface area for effective redox reactions. CQDs are then incorporated to the further improve photoconversion efficiency. Due strong visible absorption property and enhanced separation...