A5002727103- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Optical properties and cooling technologies in crystalline materials
- Magnetic properties of thin films
- 2D Materials and Applications
- Magnetic Field Sensors Techniques
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Microfluidic and Bio-sensing Technologies
- Solid-state spectroscopy and crystallography
- Nanocluster Synthesis and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Nanomaterials in Catalysis
- Magnetic Properties and Applications
- Non-Destructive Testing Techniques
- Luminescence Properties of Advanced Materials
- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Condensed Matter Physics
- Neural Networks and Reservoir Computing
- Luminescence and Fluorescent Materials
- Microwave Dielectric Ceramics Synthesis
- Organic and Molecular Conductors Research
- Cyclone Separators and Fluid Dynamics
Hebei University of Technology
2025
China University of Geosciences
2025
Zhejiang Lab
2025
Beijing Institute of Technology
2022-2024
IRD Fuel Cells (Denmark)
2024
Nanjing Tech University
2023-2024
Nanjing University
2017-2023
Collaborative Innovation Center of Advanced Microstructures
2017-2023
Sun Yat-sen University
2023
Guangzhou University of Chinese Medicine
2023
Hybrid metal/semiconductor nano-heterostructures with strong exciton-plasmon coupling have been proposed for applications in hot carrier optoelectronic devices. However, the performance of devices based on this concept has limited by poor efficiency plasmon-hot electron conversion at interface. Here, we report that interfacial excitation transfer can be substantially improved hybrid metal semiconductor consisting perovskite semiconductors. In Ag-CsPbBr3 nanocrystals, both plasmon-induced and...
Perovskite semiconductor nanocrystals with different compositions have shown promise for applications in light-emitting devices. Dark excitonic states may suppress light emission from such by providing an additional nonradiative recombination channel. Here, we study the composition dependence of dark exciton dynamics lead halides time-resolved photoluminescence spectroscopy at cryogenic temperatures. The presence a spin-related state is revealed magneto-optical spectroscopy. energy splitting...
Abstract The discovery of atomically precise nanoclusters is generally unpredictable, and the rational synthesis guided by theoretical design still in its infancy. Here we present a de novo Au 36 (SR) 24 nanoclusters, from prediction to experimental characterization their physicochemical properties. crystal structure an nanocluster perfectly matches simulated structural pattern with 4 tetrahedral units along two-dimensional growth. indeed differs isomer whose kernel dissected manner...
Epitaxial growth is one of the most commonly used strategies to precisely tailor heterostructures with well-defined compositions, morphologies, crystal phases, and interfaces for various applications. However, as epitaxial requires a small interfacial lattice mismatch between components, it remains challenge synthesis constructed by materials large and/or different chemical bonding, especially noble metal-semiconductor heterostructures. Here, we develop metal-seeded strategy prepare highly...
We demonstrate that Ag(I) complex can fix bromide on the nanocrystal surface, reduce surface trap density, and as a result efficiently passivate of CsPbBr3 nanocrystals. This passivation makes photoluminescence (PL) intensity increase several times. The PL kinetics study clearly shows decay lifetime increased after passivation. TEM XPS analyses demonstrated existence Ag surface. In addition, we utilize single-particle spectroscopy combined with in situ light analysis to further confirm...
Abstract The assembly of atomically precise metal nanoclusters offers exciting opportunities to gain fundamental insights into the hierarchical nanoparticles. However, it is still challenging control individual at a molecular or atomic level. Herein, we report dimeric Au 25 (PET) 18 (PET=2‐phenylethanethiol), where two monomers are bridged together by Ag atoms form 2 50 36 dimer. dimer unique mesomer, which has not been found in any other chiral nanoclusters. Furthermore, distinct from...
In almost any branch of chemistry or life sciences, it is often necessary to study the interaction between different components in a system by varying their respective concentrations systematic manner.
Perovskite semiconductor nanocrystals (NCs) exhibit highly efficient optical gain, which is promising for laser applications. However, the intrinsic mechanism of gain in perovskite NCs, particularly whether more than one exciton per NCs required, remains poorly understood. Here, we use two-dimensional electronic spectroscopy to resonantly probe interplay between near-band-edge transitions during buildup CsPbBr3 NCs. We find compelling evidence conclude that generated through stimulated...
Abstract Quasi‐2D perovskites have shown great potential in achieving solution‐processed electrically pumped laser diodes due to their multiple‐quantum‐well structure, which induces a carrier cascade process that can significantly enhance population inversion. However, continuous‐wave (CW) optically lasing has yet be achieved with near‐infrared (NIR) quasi‐2D the challenges obtaining high‐quality films suitable phase distribution and morphology. This study regulates crystallization of NIR...
Compared to the well-recognition of role Cr in passive films stainless steel, relationship between structure and composition high-entropy alloys (HEAs) with is insufficiently understood. Here, using aberration-corrected transmission electron microscopy (Cs-TEM) combined corrosion electrochemical testing, we revealed that CrxMnFeCoNi are remarkably thin, typically measuring only 1.5-3 nm thickness possess a single-layer structure, which different from steels. The resistance can be notably...
ABSTRACT Ecosystem service quality is closely linked to human well‐being, and sustainable provision of ecosystem essential for ensuring regional ecological security achieving sustainability goals. An innovative valuation framework introduced that combines land use/cover change (LUCC) analysis, supply demand matrices Gini coefficient calculations assess the services (ES‐S ES‐D). Unlike traditional static methods, this approach captures intricate spatial temporal mismatches, offering new...
Perovskite semiconductor nanocrystals have emerged as an excellent family of materials for optoelectronic applications, where biexciton interaction is essential optical gain generation and quantum light emission. However, the strength remains highly controversial due to entangled spectral features exciton- biexciton-related transitions in conventional measurement approaches. Here, we tackle limitation by using polarization-dependent two-dimensional electronic spectroscopy quantify excitation...
Two-dimensional (2D) materials, such as graphene, transition metal dichalcogenides (TMDs), black phosphorus (BP) and related derivatives, have attracted great attention due to their advantages of flexibility, strong light-matter interaction, broadband absorption high carrier mobility, become a powerful contender for next-generation infrared photodetectors. However, since the thickness two-dimensional materials is on order nanometers, very weak, which limits detection performance 2D...
We present and demonstrate a novel imprint method, electrostatic force-assisted nanoimprint lithography (EFAN), where voltage applied between mold substrate generates an force that presses the into resist on substrate. have successfully used EFAN to pattern nanostructures in photocurable spin-coated wafer, with high fidelity excellent uniformity over entire substrate, ambient atmosphere without using vacuum chamber. In initial tests any process optimization, 100 nm half-pitch gratings...
Abstract Perovskite semiconductor nanocrystals have emerged as a promising family of materials for optoelectronic applications including light-emitting diodes, lasers, light-to-electricity convertors and quantum light emitters. The performances these devices are fundamentally dependent on different aspects the excited-state dynamics in nanocrystals. Herein, we summarize recent progress photoinduced carrier studied by variety time-resolved spectroscopic methods perovskite We review...
Quantum dephasing of excitonic transitions in CsPbBr3 nanocrystals has been studied using two-dimensional electronic spectroscopy at cryogenic temperatures. The exciton–phonon interactions for acoustic and optical modes exhibit different effects on the coherent dynamics transitions. homogeneous linewidth shows a proportional dependence temperature, suggesting primary channel elastic scattering between exciton modes. exciton–optical mode interaction is manifested as beatings off-diagonal...
Domain boundaries (DBs) in charge density wave (CDW) systems not only are important for understanding the mechanism of how CDW interplays with other quantum phases but also have potential future CDW-based nanodevices. However, current research on DBs materials has been mainly limited to those between homochiral domains, whereas heterochiral especially atomic layers, remain largely unexplored. Here, we studied geometric and electronic states single-layer bilayer 1T-NbSe
2H-NbSe2 is a prototypical charge-density-wave (CDW) system, exhibiting such symmetry-breaking quantum ground state in its bulk and down to single-atomic-layer limit. However, how this depends on dimensionality what governs the effect remain controversial. Here, we experimentally demonstrate robust 3 × CDW phase both freestanding substrate-supported bilayer NbSe2, far above transition temperature. We exclude environmental effects reveal strong temperature thickness dependence of Raman...
Abstract The assembly of atomically precise metal nanoclusters offers exciting opportunities to gain fundamental insights into the hierarchical nanoparticles. However, it is still challenging control individual at a molecular or atomic level. Herein, we report dimeric Au 25 (PET) 18 (PET=2‐phenylethanethiol), where two monomers are bridged together by Ag atoms form 2 50 36 dimer. dimer unique mesomer, which has not been found in any other chiral nanoclusters. Furthermore, distinct from...