A5084022753- 2D Materials and Applications
- Graphene research and applications
- Perovskite Materials and Applications
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Quantum Dots Synthesis And Properties
- Optical Network Technologies
- Nanowire Synthesis and Applications
- Energy Harvesting in Wireless Networks
- Topological Materials and Phenomena
- Plasmonic and Surface Plasmon Research
- Advanced Electron Microscopy Techniques and Applications
- Solar-Powered Water Purification Methods
- Viral Infections and Vectors
- Advanced Photocatalysis Techniques
- Semiconductor Quantum Structures and Devices
- Acoustic Wave Resonator Technologies
- Photorefractive and Nonlinear Optics
- Hedgehog Signaling Pathway Studies
- Ion-surface interactions and analysis
- MXene and MAX Phase Materials
- Quantum and electron transport phenomena
Gannan Medical University
2025
Peking University
2015-2024
South China Normal University
2021-2024
Center for Life Sciences
2024
Beijing National Laboratory for Molecular Sciences
2024
Nanjing Medical University
2024
Southwest Jiaotong University
2022
Collaborative Innovation Center of Quantum Matter
2017-2021
Southern Medical University
2021
Nanfang Hospital
2021
Ionic transport in organometal halide perovskites is of vital importance because it dominates anomalous phenomena perovskite solar cells, from hysteresis to switchable photovoltaic effects. However, excited state ionic under illumination has remained elusive, although essential for understanding the unusual light-induced effects (light-induced self-poling, photo-induced segregation and slow photoconductivity response) optoelectronic applications. Here, we quantitatively demonstrate...
Nonlinear effects in two-dimensional (2D) atomic layered materials have recently attracted increasing interest. Phenomena such as nonlinear optical edge response, chiral electroluminescence, and valley spin currents beyond linear orders opened up a great opportunity to expand the functionalities potential applications of 2D materials. Here we report first observation strong second-harmonic generation (SHG) monolayer GaSe under nonresonant excitation emission condition. Our experiments show...
Due to light-induced effects in CH3NH3-based perovskites, such as ion migration, defects formation, and halide segregation, the degradation of perovskite solar cells under maximum power point is generally implicated. Here we demonstrated that effect light-enhanced migration CH3NH3PbI3 can be eliminated by inorganic Cs substitution, leading an ultrastable cell. Quantitatively, barrier for 0.62 eV dark conditions, larger than CsPbI2Br (0.45 eV); however, it reduces 0.07 illumination, smaller...
The controlled synthesis of high-quality multilayer (ML) MoS2 flakes with gradually shrinking basal planes by chemical vapor deposition (CVD) is demonstrated. These CVD-grown ML exhibit much higher mobility and current density than mechanically exfoliated due to the reduced contact resistance which mainly resulted from direct between lower layers electrodes.
The precise precursor supply is a precondition for controllable growth of two-dimensional (2D) transition metal dichalcogenides (TMDs). Although great efforts have been devoted to modulating the supply, few effective methods chalcogen feeding control were developed. Here we report strategy using active monomer grow high-quality TMDs in robust and manner, e.g., MoS2 monolayers perform representative photoluminescent circular helicity ~92% electronic mobility ~42 cm2V-1s-1. Meanwhile, uniform...
Abstract The great challenge for the growth of non-centrosymmetric 2D single crystals is to break equivalence antiparallel grains. Even though this pursuit has been partially achieved in boron nitride and transition metal dichalcogenides (TMDs) growth, key factors that determine epitaxy are still unclear. Here we report a universal methodology enabled by accurate time sequence control simultaneous formation grain nuclei substrate steps. With methodology, have demonstrated unidirectionally...
Strain serves as a powerful freedom to effectively, reversibly, and continuously engineer the physical chemical properties of two-dimensional (2D) materials, such bandgap, phase diagram, reaction activity. Although there is high demand for full characterization strain vector at local points, it still very challenging measure amplitude its direction. Here, we report novel approach monitor in 2D molybdenum diselenide (MoSe2) by polarization-dependent optical second-harmonic generation (SHG)....
Light‐induced interlayer ultrafast charge transfer in 2D heterostructures provides a new platform for optoelectronic and photovoltaic applications. The separation process is generally hypothesized to be dependent on the stackings interactions, however, quantitative characteristic detailed mechanism remain elusive. Here, systematical study model MoS 2 /WS bilayer system with variable stacking configurations by time‐dependent density functional theory methods demonstrated. results show that...
Abstract Compared to transition metal dichalcogenide (TMD) monolayers, rhombohedral-stacked (R-stacked) TMD bilayers exhibit remarkable electrical performance, enhanced nonlinear optical response, giant piezo-photovoltaic effect and intrinsic interfacial ferroelectricity. However, from a thermodynamics perspective, the formation energies of R-stacked hexagonal-stacked (H-stacked) are nearly identical, leading mixed stacking both H- in epitaxial films. Here, we report remote epitaxy...
There is a rising prospective in harvesting energy from the environment, as situ required for distributed sensors interconnected information society, among which water flow most potential candidate clean and abundant mechanical source. However, microscale unordered movement of water, achieving sustainable direct-current generating device with high output to drive load element still challenging, requires further exploration. Herein, we propose dynamic PN junction generator moving sandwiched...
Liquid electricity generator and hydrovoltaic technology have received numerous attentions, which can be divided into horizontal movement vertical generator. The is limited for powering the integrated miniaturized energy chip as current output direction depending on moving of water droplet, means a sustainable continuous direct-current (DC) hardly achieved because film length. On other hand, existing generators include triboelectricity or humidity gradient-based liquid generator, where...
Ultrafast electron pulses, combined with laser-pump and electron-probe technologies, allow ultrafast dynamics to be characterized in materials. However, the pursuit of simultaneous ultimate spatial temporal resolution microscopy spectroscopy is largely subdued by low monochromaticity pulses their poor phase synchronization optical excitation pulses. Field-driven photoemission from metal tips provides high light-phase synchronization, but suffers large energy spreads (3-100 eV) as driven a...
Abstract 2D graphene with tremendous novel properties is an ideal material for optical and optoelectronic applications. Meanwhile, photonic crystal fibers (PCFs) have been recognized as next‐generation that possess a designable porous structure, rich functions, different working mechanisms. Recently, the integration of PCF has formed new hybrid fiber, fiber (Gr‐PCF), which exhibits extremely strong tunable light–matter interaction across broadband spectrum range opens up interdisciplinary...
Superhydrophobic surfaces hold immense potential in underwater drag reduction. However, as the Reynolds number increases, reduction rate decreases, and it may even lead to a increase. The reason lies collapse of air mattress. To address this issue, paper develops pyramid-shaped robust superhydrophobic surface with wedged microgrooves, which exhibits high gas fraction when immersed good ability achieve complete spreading recovery mattress through replenishment case Pressure drop tests water...
Probing the crystallographic orientation of two-dimensional (2D) materials is essential to understand and engineer their properties. However, nondestructive identification lattice orientations various 2D remains a challenge due very thin nature. Here, we identify structures atomic crystals using molecules as probes by utilizing orientation-dependent molecule-substrate interactions. We discover that periodic packing guides oleamide assemble into quasi-one-dimensional nanoribbons with specific...
Controllable growth of two-dimensional (2D) single crystals on insulating substrates is the ultimate pursuit for realizing high-end applications in electronics and optoelectronics. However, most typical 2D insulator, hexagonal boron nitride (hBN), production a single-crystal monolayer remains challenging. Here, we propose methodology to realize facile inch-sized hBN monolayers various by an atomic-scale stamp-like technique. The Cu foils grown with films can stick tightly (within 0.35 nm)...
Strain is an important method to tune the properties of topological insulators. For example, compressive strain can induce superconductivity in Bi2Se3 bulk material. Topological insulator nanostructures are superior candidates utilize unique surface states due large volume ratio. Therefore, it highly desirable monitor local effects individual nanostructures. Here, we report systematical micro-Raman spectra single strained nanoribbons with different thicknesses and facets, where four optical...
Strong-field photoemission produces attosecond (10-18 s) electron pulses that are synchronized to the waveform of incident light. This nonlinear lies at heart current technologies. Here we report a new behaviour-the nonlinearity in strong-field regime sharply increases (approaching 40th power-law scaling), making use sub-nanometric carbon nanotubes and 800 nm pulses. As result, carrier-envelope phase sensitive shows greatly improved modulation depth up 100% (with total 2 nA). The...