A5090306088- Advanced Electron Microscopy Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- nanoparticles nucleation surface interactions
- GaN-based semiconductor devices and materials
- Advanced Photocatalysis Techniques
- High Temperature Alloys and Creep
- Advanced Aircraft Design and Technologies
- Machine Learning in Materials Science
- Semiconductor Quantum Structures and Devices
- Advanced Materials Characterization Techniques
- Nanowire Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Force Microscopy Techniques and Applications
- Aerospace Engineering and Energy Systems
- Electronic and Structural Properties of Oxides
- Catalysis and Oxidation Reactions
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Aerospace and Aviation Technology
- Covalent Organic Framework Applications
Friedrich-Alexander-Universität Erlangen-Nürnberg
2017-2025
Nanjing University of Science and Technology
2020-2024
North China Electric Power University
2024
Jiangxi Normal University
2023
Bayer (Germany)
2023
Ministry of Industry and Information Technology
2019-2020
Nanjing University of Aeronautics and Astronautics
2017-2020
University of Hong Kong
2020
Hong Kong University of Science and Technology
2020
Forschungsverbund Berlin
2019
Abstract The development of a robust quasi-ohmic contact with minimal resistance, good stability and cost-effectiveness is crucial for perovskite solar cells. We introduce generic approach featuring Lewis-acid layer sandwiched between dopant-free semicrystalline polymer metal electrode in cells, resulting an ideal even at elevated temperature up to 85 °C. solubility Lewis acid alcohol facilitates nondestructive solution processing on top polymer, which boosts hole injection from into by two...
Our contribution demonstrates that rhodium, an element has barely been reported as active metal for selective dehydrogenation of alkanes becomes a very active, selective, and robust catalyst when exposed to propane in the form single atoms at interface solid-supported, highly dynamic liquid Ga–Rh mixture. We demonstrate transition fully supported alloy droplet Ga/Rh ratios above 80, results drastic increase activity with high propylene selectivity. The combining from catalytic studies, X-ray...
Metal-organic frameworks (MOFs) have attracted increasing interest for broad applications in catalysis and gas separation due to their high porosity. However, the insulating feature limited active sites hindered MOFs as photocathode materials application photoelectrocatalytic hydrogen generation. Herein, we develop a layered conductive two-dimensional conjugated MOF (2D c-MOF) comprising sp-carbon based on arylene-ethynylene macrocycle ligand via CuO
The application of one kind metal-organic framework (MOF) material used in multiple fields is the most interesting research topics. In this work, four new tetra-nuclear cluster-based lanthanide frameworks (LnMOFs) [Ln2(BTDB)3(DMA)(phen)]n (Ln = Tb TbMOF, Eu EuMOF, Gd GdMOF, Tb1.830Eu0.170Tb,EuMOF, 3,5-bis(trifluoromethyl)-4',4″-dicarboxytriphenylamine H2BTDB, 1,10-phenanthroline phen) are obtained based on ligand H2BTDB that synthesized our laboratory, and precise single-crystal structure...
A significant electron-beam induced heating effect is demonstrated for liquid-phase transmission electron microscopy at low flux densities using Au nanoparticles as local nanothermometers. The obtained results are in agreement with theoretical considerations. Furthermore, the impact of beam-induced on radiolysis chemistry estimated and consequences discussed.
Utilizing ionizing radiation for in situ studies liquid media enables unique insights into nanostructure formation dynamics. As radiolysis interferes with observations, kinetic simulations are employed to understand and exploit beam-liquid interactions. By introducing an intuitive tool simulate arbitrary models chemistry, it is demonstrated that these provide a holistic understanding of reaction mechanisms. This shown irradiated HAuCl
InPBi was predicted to be the most robust infrared optoelectronic material but also difficult synthesize within In-VBi (V = P, As and Sb) 25 years ago. We report first successful growth of single crystals with Bi concentration far beyond doping level by gas source molecular beam epitaxy. The thin films reveal excellent surface, structural optical qualities making it a promising new III–V compound family member for heterostructures. is found 2.4 ± 0.4% 94 5% atoms at substitutional sites....
We investigate the structural properties of GaAsBi layers grown by molecular beam epitaxy on GaAs at substrate temperatures between 220–315 °C. Irrespective growth temperature, structures exhibited similar Bi compositions, and good overall crystal quality as deduced from X-Ray diffraction measurements. After thermal annealing low 500 °C, lowest a significant reduction lattice constant. The variation was significantly larger for Bi-containing samples than Bi-free low-temperature reference....
We report the formation and phase transformation of Bi-containing clusters in Bi epilayers upon annealing. The layers were grown by molecular beam epitaxy under low (220 ) high (315 temperatures subsequently annealed using different annealing times. identified only samples that at temperature, revealing a relatively homogeneous size distribution. Depending on temperature duration, show sizes ranging from 5 to 20 nm, as well crystallographic phase, being coherently strained zincblende (zb...
Abstract PbS nanocrystals have been proven to be highly suitable for photodetector fabrication by facile solution processing, and successfully tested as photosensitive material in imaging devices. So far, their spectral response has blue‐shifted with respect that of commercial bulk detectors, due quantum confinement nanostructures smaller than the exciton Bohr radius. Here, a nanocrystal synthesis approach is introduced, allowing surpass this limit, thus push cut‐off wavelength value...
In this work, we present the first observation and high-resolution analysis of Frank partial dislocations formed upon high temperature creep inside L12 structure a superalloy. The associated planar faults are observed in multinary Co-based superalloy after [001] tensile at 850 °C 400 MPa up to plastic strain 4.6%. With their a/3〈111〉 Burgers vectors create superlattice intrinsic stacking (SISFs) by positive climb motion via vacancy condensation. High-resolution opposite end such an SISF...
Herein we introduce for the first time a reduced “grey” brookite TiO<sub>2</sub>photocatalyst, produced by thermal hydrogenation of nanoparticles, that shows remarkable noble metal free photocatalytic H<sub>2</sub>evolution.
Bottom‐up syntheses of carbon nanodots (CND) using solvothermal treatment citric acid are known to afford nanometer‐sized, amorphous polycitric acid‐based materials. The addition suitable co‐reactants in the form in‐situ synthesized N‐hetero‐π‐conjugated chromophores facilitates hereby overall functionalization. Our incentive was design a CND model that features phenazine (P‐CND) – well‐known chromophore investigate influence matrix on its redox chemistry as well photochemistry. scope our...
Bottom‐up syntheses of carbon nanodots (CND) using solvothermal treatment citric acid are known to afford nanometer‐sized, amorphous polycitric acid‐based materials. The addition suitable co‐reactants in the form in‐situ synthesized N‐hetero‐π‐conjugated chromophores facilitates hereby overall functionalization. Our incentive was design a CND model that features phenazine (P‐CND) – well‐known chromophore investigate influence matrix on its redox chemistry as well photochemistry. scope our...
Extensive annealing of (Al,Sc)N sputter films reveals an ordering scandium into basal monolayers. The structural characterisation, a thermodynamic formation model and its implications on material growth device stability is presented.
Solid-state-Dewetting (SSD) of thin films is increasingly utilized to fabricate nanoparticles for catalysis. In-depth understanding particle formation mechanism crucial control key properties catalytic particles such as size, size distribution, and structure. In contrast most studies on SSD metal smooth substrates (e.g., SiO2/Si, …), here we investigate how the topography practical substrates, electrically conductive F-SnO2 (FTO), affects Pt – with potential use nanoparticle electrodes,...
Antimony sulfide (Sb$_2$S$_3$), a compound of earth-abundant elements with highly anisotropic, quasi-layered crystal structure, triggered growing interest as solar absorber in photovoltaics and phase change material memory devices, yet challenges remain achieving high-quality thin films controlled nucleation growth for optimal performance. Here, we investigate the transformation, structure properties, degradation atomic layer deposited Sb$_2$S$_3$ using situ TEM correlative ex analysis. The...
We demonstrate elastically filtered 3D Electron Diffraction (3D ED) as a powerful alternative technique to Grazing Incidence Wide-Angle X-ray Scattering (GIWAXS) for quantitatively characterizing the structure of organic semiconductor films. Using model material system solvent vapor annealed DRCN5T:PC71BM thin film, which is employed in solar cells (OSCs), we extract structural data obtained from ED and compare with that GIWAXS, utilizing both laboratory synchrotron sources. Quantitative...
Electron tomography (ET) offers nanoscale 3D characterization of mesoporous materials but is often limited by their low scattering contrast. Here, we introduce a gallium (Ga) intrusion strategy for silica that dramatically improves imaging contrast - key benefit enables more accurate reconstructions. By infiltrating Ga through modified mercury porosimetry process, the high-angle annular dark-field (HAADF) STEM signal enhanced 5 times, resulting in 34% improvement reconstruction resolution...