A5100718745- Advancements in Battery Materials
- Perovskite Materials and Applications
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Extraction and Separation Processes
- Drilling and Well Engineering
- Gas Sensing Nanomaterials and Sensors
- Enhanced Oil Recovery Techniques
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
- Advanced battery technologies research
- Advanced Chemical Sensor Technologies
- Petroleum Processing and Analysis
- Quantum Dots Synthesis And Properties
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Transition Metal Oxide Nanomaterials
- ZnO doping and properties
- Analytical Chemistry and Sensors
- Advanced Photocatalysis Techniques
- Advancements in Semiconductor Devices and Circuit Design
- Graphene research and applications
- Ferroelectric and Piezoelectric Materials
Australian National University
2025
Beijing Computational Science Research Center
2024-2025
Tsinghua University
2018-2025
Yibin University
2022-2024
Yibin Vocational and Technical College
2022-2024
China University of Petroleum, East China
2015-2024
Eindhoven University of Technology
2020-2024
Hunan University
2023-2024
West Anhui University
2024
Xidian University
2023
Mixed halide perovskites that are thermodynamically stable in the dark demix under illumination. This is problematic for their application solar cells. We present a unified thermodynamic theory this light-induced segregation based on free energy lowering of photocarriers funnelling to nucleated phase with different composition and lower band gap than parent phase. apply sequence mixed iodine-bromine perovskites. The spinodals separating metastable unstable regions composition-temperature...
In this work, NaV3O8 nanowires are proposed as a novel cathode for Na-ion battery the first time. The as-prepared characterized well by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, thermogravimetry (TG), photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Sodium insertion/extraction properties of with or without thermal treatment compared. It is found that could remove some crystal water in host, resulting contracted volume. comparison...
Photoinduced halide segregation hinders widespread application of three-dimensional (3D) mixed-halide perovskites. Much less is known about this phenomenon in lower-dimensional systems. Here, we study photoinduced mixed iodide-bromide perovskites (PEA
Previous studies have shown that the addition of low carbon alcohols can significantly enhance oil recovery in surfactant flooding and alkaline flooding. In this paper, influence middle (including n-butanol, n-pentanol, isoamyl alcohol, n-hexanol) on waterflooding, flooding, foam for enhanced heavy-oil was investigated. Foaming tests, viscosity measurements, IFT emulsification sandpack tests were conducted to investigate effects mechanisms by alcohols. The results show added has no obvious...
Light-induced halide segregation hampers obtaining stable wide-band-gap solar cells based on mixed iodide–bromide perovskites. So far, the effect of prolonged illumination performance mixed-halide perovskite has not been studied in detail. It is often assumed that leads to a loss open-circuit voltage. By simultaneously recording changes photoluminescence and cell under illumination, we demonstrate instead deteriorate by short-circuit current density voltage less affected. The concurrent red...
The two-dimensional (2D) mixed halide perovskite PEA2Pb(I1-x Br x )4 exhibits high phase stability under illumination as compared to the three-dimensional (3D) counterpart MAPb(I1-x )3. We explain this difference using a thermodynamic theory that considers sum of compositional and photocarrier free energy. Ab initio calculations show improved 2D is caused by preferred I-Br distribution, leading much lower critical temperature for segregation in dark than 3D perovskite. Moreover, smaller...
Two-dimensional (2D) organic-inorganic hybrid iodide perovskites have been put forward in recent years as stable alternatives to their three-dimensional (3D) counterparts. Using first-principles calculations, we demonstrate that equilibrium concentrations of point defects the 2D PEA
A facile ultrasonication method was used to uniformly mix nanospindle-shaped FeOOH (80-100 nm) and a conductive matrix of graphene oxide (GO) form FeOOH/GO composites. No carbon peak observed in the X-ray diffraction pattern, indicating that did not stack together dispersion very high. photoelectron spectroscopy (XPS) tests showed formation Fe-O-C bonds played positive role electron transport, revealing it has certain impact on electrochemical performance FeOOH/GO. The further characterized...
The moisture-induced instability of metal halide perovskites is one the major challenges for perovskite devices. Although compositional engineering has been widely employed to improve overall stability perovskites, its effect on received little attention. Here, we systematically study interaction water with surfaces primary AMX3 (A+ = MA+, FA+, Cs+; M2+ Pb2+, Sn2+; X− I−, Br−), by using Density Functional Theory (DFT) calculations and comprehensive chemical bonding analysis. We reveal that...
The perovskite CsPbBr3 exhibits an unusual nonmonotonic dependence of the band gap on increasing pressure to about 2.0 GPa as compared conventional semiconductors. Using first-principles calculation method, we show that under pressure, isotropic volume deformation induces considerable compression Pb–Br bond length and thus enhanced interaction between atomic orbitals antibonding valence maximum states mostly nonbonding conduction minimum states, resulting in a monotonic decrease gap. On...
Owing to the predominant merit of tunable bandgaps, tin-lead mixed perovskites have shown great potentials in realizing near-infrared optoelectronics and are receiving increasing attention. However, despite merit, there is still a lack fundamental understanding bandgap variation as function Sn/Pb ratio, mainly because films easy segregate terms both composition phase. Here, we report fully stoichiometric synthesis monocrystalline FAPb 1− x Sn I 3 nanocrystals well their atomic-scale imaging....
This study evaluates the transmission relationships and spatial correlation network structure of water resources green efficiency among seven urban agglomerations in Yellow River Basin from 2008 to 2022. Using Super-SBM model, was measured. A modified gravity model then employed assess linkage intensity cities. Social analysis applied explore structural characteristics evolution patterns network. Results reveal a fluctuating trend, characterized by “rising, falling, finally rising,” with an...